IP Routing Protocols Commands

IP Routing Protocols Commands

IP Routing Protocols Commands

This chapter describes the function and displays the syntax of each IP routing command. For more information about defaults and usage guidelines, see the corresponding chapter of the Router Products Command Reference publication.

[no] aggregate-address address mask [as-set] [summary-only]
[suppress-map map-name]

To create an aggregate entry in a BGP routing table, use the aggregate-address router configuration command. To disable this feature, use the no form of this command.

address	Aggregate address.
mask	Aggregate mask.
as-set	(Optional) Generate AS set path information.
summary-only	(Optional) Filter more specific routes from updates.
suppress-map map-name	(Optional) Name of route-map to suppress.

[no] area area-id authentication
no area area-id

To enable authentication for an OSPF area, use the area authentication router configuration command. To remove an area's authentication specification or a specified area from the router's configuration, use the no form of this command.

area-id

Identifier of the area for which authentication is to be enabled. The identifier can be specified as either a decimal value or an IP address.

[no] area area-id default-cost cost

To specify a cost for the default summary route sent into a stub area, use the area default-cost router configuration command. To remove the assigned default route cost, use the no form of this command.

area-id	Identifier for the stub area. The identifier can be specified as either a decimal value or as an IP address.
cost	Cost for the default summary route used for a stub area. The acceptable value is a 24-bit number. The default cost is 1.

[no] area area-id range address mask

To consolidate and summarize routes at an area boundary, use the area range router configuration command. To disable this function, use the no form of this command.

area-id	Identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.
address	IP address.
mask	IP mask.

[no] area area-id stub

To define an area as a stub area, use the area stub router configuration command. To disable this function, use the no form of this command.

area-id

Identifier for the stub area. The identifier can be either a decimal value or an IP address.

[no] area area-id virtual-link router-id [hello-interval seconds]
[retransmit-interval seconds] [transmit-delay seconds]
[dead-interval seconds] [authentication-key password]

To define an OSPF virtual link, use the area virtual-link router configuration command with the optional parameters. To remove a virtual link, use the no form of this command.

area-id	Area ID assigned to the transit area for the virtual link. This can be either a decimal value or a valid IP address. There is no default.
router-id	Router ID associated with the virtual link neighbor. The router ID appears in the show ip ospf display. It is internally derived by each router from the router's interface IP addresses. This value must be entered in the format of an IP address. There is no default.
hello-interval	(Optional) Number of seconds between the hello packets that the router sends on an interface.
seconds	(Optional) Unsigned integer value to be advertised in the router's hello packets. The value must be the same for all routers attached to a common network. The default is 10 seconds.
retransmit- interval	(Optional) Number of seconds between link state advertisement retransmissions for adjacencies belonging to the interface.
seconds	(Optional) Expected round-trip delay between any two routers on the attached network. The value must be greater than the expected round-trip delay. The default is 5 seconds.
transmit-delay	(Optional) Estimated number of seconds it takes to transmit a link state update packet on the interface.
seconds	(Optional) Integer value that must be greater than zero. Link state advertisements in the update packet have their age incremented by this amount before transmission. The default value is 1 second.
dead-interval	(Optional) Number of seconds that a router's hello packets are not seen before its neighbors declare the router down.
seconds	(Optional) Unsigned integer value. The default is four times the hello interval. As with the hello interval, this value must be the same for all routers attached to a common network.
authentication-key	(Optional) Specific password to be used by neighboring routers.
password	(Optional) Any continuous string of characters, up to 8 bytes long, that you can enter from the keyboard. This string acts as a key that will allow the authentication procedure to generate or verify the authentication field in the OSPF header. This key is inserted directly into the OSPF header when originating routing protocol packets. A separate password can be assigned to each network on a per-interface basis. All neighboring routers on the same network must have the same password to be able to route OSPF traffic. There is no default value.

area-password [password]
no area-password [password]

To configure the IS-IS area authentication password, use the area-password router configuration command. To disable the password, use the no form of this command.

password

Password you assign.

[no] auto-summary

To restore the default behavior of automatic summarization of subnet routes into network-level routes, use the auto-summary router configuration command. To disable this feature, use the no form of this command.

[no] autonomous-system local-as

To specify the local autonomous system that the router resides in for EGP, use the autonomous-system global configuration command. To remove the autonomous system number, use the no form of this command.

local-as

Local autonomous system number to which the router belongs.

[no] bgp common-as autonomous-system [autonomous-system ... ]

To specify which autonomous systems belong to a common administration, use the bgp common-as router configuration command. To remove an autonomous system from the common administration, use the no form of this command.

autonomous-system

Autonomous system numbers that belong to a common administration.

[no] bgp confederation identifier autonomous-system

To specify a BGP confederation identifier, use the bgp confederation identifier router configuration command. To remove the confederation identifier, use the no form of this command.

autonomous-system

Autonomous system number that internally includes multiple autonomous systems.

[no] bgp confederation peers autonomous-system [autonomous-system
... ]

To configure the autonomous systems that belong to the confederation, use the bgp confederation peers router configuration command. To remove an autonomous system from the confederation, use the no form of this command.

autonomous-system

Autonomous system number.

[no] bgp default local-preference value

To change the default local preference value, use the bgp default local-preference command. To return to the default setting, use the no form of this command.

value

Local preference value. Higher is more preferred. Integer from 0 through 4294967295.

[no] bgp fast-external-fallover

To immediately reset the BGP sessions of any directly adjacent external peers if the link used to reach them goes down, use the bgp fast-external-fallover router configuration command. To disable this feature, use the no form of this command.

clear ip bgp {* | address}

To reset a BGP connection, use the clear ip bgp EXEC command at the system prompt.

*	Resets all current BGP sessions.
address	Resets only the identified BGP neighbor.

clear ip eigrp neighbors [ip-address | interface]

To delete entries from the neighbor table, use the clear ip eigrp neighbors EXEC command.

ip-address	(Optional) Address of the neighbor.
interface	(Optional) Interface type and number. Specifying this argument removes from the neighbor table all entries learned via this interface.

clear ip igmp group [group-name | group-address | type number]

To delete entries from the IGMP cache, use the clear ip igmp group privileged EXEC command.

group-name	(Optional) Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
group-address	(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.
type	(Optional) Interface type.
number	(Optional) Interface number.

clear ip mroute * | {group-name | group-address} [source-address]

To delete entries from the IP multicast routing table, use the clear ip mroute EXEC command.

*	Deletes all entries from the IP multicast routing table.
group-name	Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
group-address	Address of the multicast group. This is a multicast IP address in four-part dotted notation.
source-address	(Optional) Address of a router that is a member of the multicast group. If you specify source-address, you must specify either group-name or group-address.

clear ip route {network [mask] | *}

To delete entries from the IP routing table, use the clear ip route EXEC command.

network	Network or subnet address to remove.
mask	(Optional) Subnet mask to remove.
*	Removes all routing table entries.

[no] default-information allowed {in | out} [route-map map-tag]

To control the candidate default routing information between IGRP or Enhanced IGRP processes, use the default-information allowed router configuration command. To suppress IGRP or Enhanced IGRP candidate information in incoming updates, use the no default-information allowed in command. To suppress IGRP or Enhanced IGRP candidate information in outbound updates, use the no default-information allowed out command.

in	Allows IGRP or Enhanced IGRP exterior or default routes to be received by an IGRP or Enhanced IGRP process.
out	Allows IGRP or Enhanced IGRP exterior routes to be advertised in updates.
route-map map-tag	(Optional) Indicates that the route map should be interrogated to filter the importation of routes from this source routing protocol to the current routing protocol. The argument map-tag is the identifier of a configured route map. If you specify route-map without specifying map-tag, no routes are imported. If you omit route-map, all routes are redistributed.

[no] default-information originate

To allow the redistribution of network 0.0.0.0 into BGP, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

[no] default-information originate

To explicitly configure EGP to generate a default route, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

[no] default-information originate [route-map map-name]

To generate a default route into an IS-IS routing domain, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

originate	Originates the default route regardless of whether it resides in the routing table.
route-map map-name	(Optional) Routing process will generate the default route if the route-map is satisfied.

[no] default-information originate [always] [metric metric-value]
[metric-type type-value] {level-1 | level-1-2 | level-2}
[route-map map-name]

To generate a default route into an OSPF routing domain, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

originate	For OSPF, causes the router to generate a default external route into an OSPF domain if the router already has a default route and you want to propagate to other routers. For IS-IS, originates the default route whether or not it resides in the routing table.
always	(Optional) For OSPF, the default route always will be advertised whether or not the router has a default route.
metric metric-value	(Optional) Metric used for generating the default route. If a value is not specified for this option, and no value is specified using the default-metric router configuration command, the default metric value is 10. The value used is specific to the protocol.
metric-type type-value	(Optional) For OSPF, the external link type associated with the default route advertised into the OSPF routing domain. It can be one of two values: 1—Type 1 external route 2—Type 2 external route If a metric-type is not specified, the router adopts a Type 2 external route. For IS-IS, it can be one of two values: internal—IS-IS metric which is < 63. external—IS-IS metric which is > 64 < 128. The default is internal.
level-1	For IS-IS only, Level 1 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 1 area.
level-1-2	For IS-IS only, both Level 1 and Level 2 routes are redistributed into other IP routing protocols. It specifies if IS-IS advertises network 0.0.0.0 into both levels in a single command.
level-2	For IS-IS only, Level 2 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 2 subdomain.
route-map map-name	(Optional) Routing process will generate the default route if the route-map is satisfied.

[no] default-metric number

To set default metric values for the BGP, EGP, OSPF, and RIP routing protocols, use this form of the default-metric router configuration command. To return to the default state, use the no form of this command.

number

Default metric value appropriate for the specified routing protocol

[no] default-metric bandwidth delay reliability loading mtu

To set metrics for IGRP or Enhanced IGRP, use this form of the default-metric router configuration command. To remove the metric value and return to the default state, use the no form of this command.

bandwidth	Minimum bandwidth of the route in kilobits per second. It can be 0 or any positive integer.
delay	Route delay in tens of microseconds. It can be 0 or any positive number that is a multiple of 39.1 nanoseconds.
reliability	Likelihood of successful packet transmission expressed as a number between 0 and 255. The value 255 means 100 percent reliability, and the value 0 means no reliability.
loading	Effective bandwidth of the route expressed as a number from 0 to 255 (255 is 100 percent loading).
mtu	Minimum maximum transmission unit (MTU) size of the route in bytes. It can be 0 or any positive integer.

[no] distance weight [address mask [access-list-number]] [ip]

To define an administrative distance, use the distance router configuration command. To remove a distance definition, use the no form of this command.

weight	Administrative distance. This can be an integer from 10 to 255. (The values 0 through 9 are reserved for internal use.) Used alone, the argument weight specifies a default administrative distance that the router uses when no other specification exists for a routing information source. Routes with a distance of 255 are not installed in the routing table.
address	(Optional) IP address in four-part dotted notation.
mask	(Optional) IP address mask in four-part dotted-decimal format. A bit set to 1 in the mask argument instructs the router to ignore the corresponding bit in the address value.
access-list-number	(Optional) Number of a standard IP access list to be applied to incoming routing updates.
ip	(Optional) IP-derived routes for IS-IS. It can be applied independently for IP routes and ISO CLNS routes.

distance bgp external-distance internal-distance local-distance
no distance bgp

To allow the use of external, internal, and local administrative distances that could be a better route to a node, use the distance bgp router configuration command. To return to the default values, use the no form of this command.

external-distance	Administrative distance for BGP external routes. External routes are routes for which the best path is learned from a neighbor external to the autonomous system. Acceptable values are from 1 to 255. The default is 20. Routes with a distance of 255 are not installed in the routing table.
internal-distance	Administrative distance for BGP internal routes. Internal routes are those routes that are learned from another BGP entity within the same autonomous system. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.
local-distance	Administrative distance for BGP local routes. Local routes are those networks listed with a network router configuration command, often as back doors, for that router or for networks that are being redistributed from another process. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.

distance eigrp internal-distance external-distance
no distance eigrp

To allow the use of two administrative distances—internal and external—that could be a better route to a node, use the distance eigrp router configuration command. To reset these values to their defaults, use the no form of this command.

internal-distance	Administrative distance for IP Enhanced IGRP internal routes. Internal routes are those that are learned from another entity within the same autonomous system. It can be a value from 1 to 255.
external-distance	Administrative distance for IP Enhanced IGRP external routes. External routes are those for which the best path is learned from a neighbor external to the autonomous system. It can be a value from 1 to 255.

[no] distribute-list access-list-number in [interface-name]

To filter networks received in updates, use the distribute-list in router configuration command. To change or cancel the filter, use the no form of this command.

access-list-number	Standard IP access list number. The list explicitly specifies which networks are to be received and which are to be suppressed.
in	Applies the access list to incoming routing updates.
interface-name	(Optional) Interface on which the access list should be applied to incoming updates. If no interface is specified, the access list will be applied to all incoming updates.

[no] distribute-list access-list-number out [interface-name |
routing-process | autonomous-system-number]

To suppress networks from being advertised in updates, use the distribute-list out router configuration command. To cancel this function, use the no form of this command.

access-list-number	Standard IP access list number. The list explicitly specifies which networks are to be sent and which are to be suppressed in routing updates.
out	Applies the access list to outgoing routing updates.
interface-name	(Optional) Name of a particular interface.
routing-process	(Optional) Name of a particular routing process, or the keyword static or connected.
autonomous-system-number	(Optional) Autonomous system number.

[no] domain-password [password]

To configure the IS-IS routing domain authentication password, use the domain-password router configuration command. To disable a password, use the no form of this command.

password

Password you assign.

[no] ip address address mask [secondary]

To specify the IP address on an interface, use the ip address interface configuration command. To remove an address, use the no form of this command.

address	IP address.
mask	IP address mask.
secondary	(Optional) Address to be added as a secondary address.

[no] ip as-path access-list access-list-number {permit | deny}
as-regular-expression

To define a BGP-related access list, use the ip as-path access-list global configuration command. To disable use of the access list, use the no form of this command.

access-list-number	Integer from 1 to 199 that indicates the regular expression access list number.
permit	Permits access for matching conditions.
deny	Denies access to matching conditions.
as-regular- expression	Autonomous system in the access list using a regular expression. See the "Regular Expressions" appendix of the Router Products Command Reference publication for information about forming regular expressions.

ip community-list community-list-number {permit | deny}
community-number
no ip community-list community-list-number

To create a community list for BGP and control access to it, use the ip community-list global configuration command. To delete the community list, use the no form of this command.

community-list- number	Integer 1 through 99 that identifies one or more permit or deny groups of communities.
permit	Permits access for a matching condition.
deny	Denies access for a matching condition.
community-number	Community number configured by a set community command. Valid value is one of the following: 1 through 4294967200. You can specify a single number or multiple numbers separated by a space. internet—The Internet community. no-export—Do not advertise this route to an EBGP peer. no-advertise—Do not advertise this route to any peer (internal or external).

[no] ip default-network network-number

To select a network as a candidate route for computing the gateway of last resort, use the ip default-network global configuration command. To remove a route, use the no form of this command.

network-number

Number of the network.

[no] ip dvmrp accept-filter access-list-number [distance]

To configure an acceptance filter for incoming DVMRP reports, use the ip dvmrp accept-filter interface configuration command. To disable this feature, use the no form of this command.

access-list-number	Number of a standard IP access list. This can be a number from 0 to 99. A value of 0 means that all sources are accepted with the configured distance.
distance	(Optional) Administrative distance to the destination.

ip dvmrp default-information {originate | only}
no ip dvmrp default-information {originate | only}

To advertise network 0.0.0.0 to DVMRP neighbors on an interface, use the ip dvmrp default-information interface configuration command. To prevent the advertisement, use the no form of this command.

originate	Other routes more specific than 0.0.0.0 can also be advertised.
only	No DVMRP routes other than 0.0.0.0 are advertised.

[no] ip dvmrp metric metric [access-list-number] [protocol process-id]

To configure the metric associated with a set of destinations for DVMRP reports, use the ip dvmrp metric interface configuration command. To disable this function, use the no form of this command.

metric	Metric associated with a set of destinations for DVMRP reports. It can be a value from 0 to 32. A value of 0 means that the route is not advertised. A value of 32 is equivalent to infinity (unreachable).
access-list- number	(Optional) Number of an access list. If you specify this argument, only the destinations that match the access list are reported with the configured metric. Any destinations not advertised because of split horizon do not use the configured metric.
protocol	(Optional) Name of unicast routing protocol. It can be bgp, egp, eigrp, igrp, isis, ospf, or rip. (Note that these are the protocol names you can specify with a router protocol command.) If you specify these arguments, only routes learned by the specified routing protocol are advertised in DVMRP report messages. If you omit these arguments, only directly connected networks are advertised when DVMRP neighbors are discovered.
process-id	(Optional) Process ID number of the unicast routing protocol.

ip gdp [priority number | reporttime seconds | holdtime seconds]
no ip gdp

To enable GDP routing on an interface, use the ip gdp interface configuration command. To disable GDP routing, use the no form of this command.

priority number	(Optional) Alters the GDP priority; default is a priority of 100. A larger number indicates a higher priority. The default is 100.
reporttime seconds	(Optional) Alters the GDP reporting interval; the default is 5 seconds for broadcast media such as Ethernets, and never for nonbroadcast media such as X.25. The default is 5 for broadcast media; 0 for nonbroadcast media.
holdtime seconds	(Optional) Alters the GDP default hold time of 15 seconds. The default is 15 seconds.

[no] ip hello-interval eigrp autonomous-system-number seconds

To configure the hello interval for the IP Enhanced IGRP routing process designated by an autonomous system number, use the ip hello-interval eigrp interface configuration command. To restore the default value, use the no form of this command.

autonomous-system-number	Autonomous system number.
seconds	Hello interval, in seconds.

[no] ip hold-time eigrp autonomous-system-number seconds

To configure the hold time for the IP Enhanced IGRP routing process designated by the autonomous system number, use the ip hold-time eigrp interface configuration command. To restore the default value, use the no form of this command.

autonomous-system-number	Autonomous system number.
seconds	Hold time, in seconds.

[no] ip igmp access-group access-list-number

To control the multicast groups that hosts on the subnet serviced on an interface can join, use the ip igmp access-group interface configuration command. To disable groups on an interface, use the no form of this command.

access-list-number

Number of a standard IP access list. This can be a number from 1 to 99.

[no] ip igmp join-group group-address

To have the router join a multicast group, use the ip igmp join-group interface configuration command. To cancel membership in a multicast group, use the no form of this command.

group-address

Address of the multicast group. This is a multicast IP address in four-part dotted notation.

ip igmp query-interval seconds
no ip igmp query-interval

To configure the frequency at which the router sends IGMP host-query messages, use the ip igmp query-interval interface configuration command. To return to the default frequency, use the no form of this command.

seconds

Frequency, in seconds, at which to transmit IGMP host-query messages. The can be a number from 0 to 65535. The default is 60 seconds.

To enable ICMP Router Discovery Protocol (IRDP) processing on an interface, use the ip irdp interface configuration command. To disable IRDP routing, use the no form of this command.

multicast	(Optional) Use the multicast address (224.0.0.1) instead of IP broadcasts.
holdtime seconds	(Optional) Length of time in seconds advertisements are held valid. The default is three times the maxadvertinterval value. Must be greater than maxadvertinterval and cannot be greater than 9000 seconds.
maxadvertinterval seconds	(Optional) Maximum interval in seconds between advertisements. The default is 600 seconds.
minadvertinterval seconds	(Optional) Minimum interval in seconds between advertisements. The default is 0.75 times the maxadvertinterval. If you change the maxadvertinterval value, this value defaults to three-quarters of the new value.
preference number	(Optional) Router's preference value. The allowed range is -2³¹ to 2³¹. The default is 0. A higher value increases the router's preference level. You can modify a particular router so that it will be the preferred router to which others home. The default is 0.
address address [number]	(Optional) IP address (address) to proxy-advertise, and optionally, its preference value (number).

[no] ip multicast-routing

To enable IP multicast routing on the router, use the ip multicast-routing global configuration command. To disable IP multicast routing, use the no form of this command.

ip multicast-threshold ttl
no ip multicast-threshold [ttl]

To configure the time-to-live (TTL) threshold of packets being forwarded out an interface, use the ip multicast-threshold interface configuration command. To return to the default TTL threshold, use the no form of this command.

ttl

Time-to-live value, in hops. It can be a value from 0 to 255. The default value is 0, which means that all multicast packets are forwarded out the interface.

ip ospf authentication-key password
no ip ospf authentication-key

To assign a password to be used by neighboring routers that are using OSPF's simple password authentication, use the ip ospf authentication-key interface configuration command. To remove a previously assigned OSPF password, use the no form of this command.

password

Any continuous string of characters, up to 8 bytes long, that can be entered from the keyboard.

ip ospf cost cost
no ip cost

To explicitly specify the cost of sending a packet on an interface, use the ip ospf cost interface configuration command. To reset the path cost to the default value, use the no form of this command.

cost

Unsigned integer value expressed as the link state metric. It can be a value in the range 1 to 65535.

ip ospf dead-interval seconds
no ip ospf dead-interval

To set how long a router's Hello packets must not have been seen before its neighbors declare the router down, use the ip ospf dead-interval interface configuration command. To return to the default time, use the no form of this command.

seconds

Unsigned integer that specifies the interval in seconds; the value must be the same for all nodes on the network. The default is four times the interval set by the ip ospf hello-interval command.

ip ospf hello-interval seconds
no ip ospf hello-interval

To specify the interval between Hello packets that the router sends on the interface, use the ip ospf hello-interval interface configuration command. To return to the default time, use the no form of this command.

seconds

Unsigned integer that specifies the interval in seconds. The value must be the same for all nodes on a specific network. The default is 10 seconds.

[no] ip ospf-name-lookup

To configure OSPF to look up Domain Name System (DNS) names for use in all OSPF show EXEC command displays, use the ip ospf-name-lookup global configuration command. To disable this feature, use the no form of this command.

ip ospf network {broadcast | non-broadcast | point-to-multipoint}
no ip ospf network

To configure the OSPF network type to a type other than the default for a given media, use the ip ospf network interface configuration command. To return to the default value, use the no form of this command.

broadcast	Sets the network type to broadcast.
non-broadcast	Sets the network type to nonbroadcast.
point-to- multipoint	Sets the network type to point-to-multipoint.

ip ospf priority number
no ip ospf priority

number

8-bit unsigned integer that specifies the priority. The range is from 0 to 255. The default is 1.

ip ospf retransmit-interval seconds
no ip ospf retransmit-interval

To specify the number of seconds between link state advertisement retransmissions for adjacencies belonging to the interface, use the ip ospf retransmit-interval interface configuration command. The no form of this command resets the link state advertisement retransmission interval to the default value.

seconds

Time in seconds between retransmissions. It must be greater than the expected round-trip delay between any two routers on the attached network. The range is 1 to 65535 seconds. The default is 5 seconds.

ip ospf transmit-delay seconds
no ip ospf transmit-delay

To set the estimated time it takes to transmit a link state update packet on the interface, use the ip ospf transmit-delay interface configuration command. To return to the default value, use the no form of this command.

seconds

Time in seconds that it takes to transmit a link state update. It can be an integer in the range is 1 to 65535 seconds. The default is 1 second.

[no] ip pim {dense-mode | sparse-mode}

To enable IP multicast routing on an interface, use the ip pim interface configuration command. To disable the PIM multicast routing protocol on the interface, use the no form of this command.

dense-mode	Enables dense mode of operation.
sparse-mode	Enables sparse mode of operation.

ip pim query-interval seconds
no ip pim query-interval [seconds]

To configure the frequency of PIM router-query messages, use the ip pim query-interval interface configuration command. To return to the default interval, use the no form of this command.

seconds

Interval, in seconds, at which periodic PIM router-query messages are sent. It can be a number from 1 to 65535. The default is 30 seconds.

[no] ip pim rp-address ip-address [access-list-number]

To configure the address of a PIM rendezvous point (RP), use the ip pim rp-address global configuration command. To remove an RP address, use the no form of this command.

ip-address	IP address of a router to be a PIM RP. This is a unicast IP address in four-part dotted notation.
access-list-number	(Optional) Number of an access list that defines which RPs are members of the group. This is a standard IP access list. The number can be from 1 to 100.

ip route network [mask] {address | interface} [distance]
no ip route

To establish static routes, use the ip route global configuration command. To remove static routes, use the no form of this command.

network	IP address of the target network or subnet.
mask	(Optional) Network mask that lets you mask network and subnetwork bits.
address	IP address of the next hop that can be used to reach that network.
interface	Network interface to use.
distance	(Optional) An administrative distance.

[no] ip router isis [tag]

To configure an IS-IS routing process for IP on an interface, use the ip router isis interface configuration command. To disable IS-IS for IP, use the no form of this command.

tag

(Optional) Defines a meaningful name for a routing process. If not specified, a null tag is assumed. It must be unique among all IP router processes for a given router. Use the same text for the argument tag as specified in the router isis global configuration command.

[no] ip split-horizon

To enable the split-horizon mechanism, use the ip split-horizon interface configuration command. To disable the split-horizon mechanism, use the no form of this command.

[no] ip split-horizon eigrp autonomous-system-number

To enable IP Enhanced IGRP split horizon, use the ip split-horizon eigrp interface configuration command. To disable split horizon, use the no form of this command.

autonomous-system-number

Autonomous system number.

[no] ip summary-address eigrp autonomous-system-number address
mask

To configure a summary aggregate address for a specified interface, use the ip summary-address eigrp interface configuration command. To disable a configuration, use the no form of this command.

autonomous-system-number	Autonomous system number.
address	IP summary aggregate address to apply to an interface.
mask	Subnet mask.

[no] is-type {level-1 | level-1-2 | level-2-only}

To configure the IS-IS level at which the router operates, use the is-type router configuration command. To reset the default value, use the no form of this command.

level-1	Router acts as a station router.
level-1-2	Router acts as both a station router and an area router. This is the default.
level-2-only	Router acts as an area router only.

isis circuit-type {level-1 | level-1-2 | level-2-only}
no isis circuit-type

To configure the type of adjacency, use the isis circuit-type interface configuration command. To reset the circuit type to Level l and Level 2, use the no form of this command.

level-1	A Level 1 adjacency may be established if there is at least one area address in common between this system and its neighbors.
level-1-2	A Level 1 and 2 adjacency is established if the neighbor is also configured as level-1-2 and there is at least one area in common. If there is no area in common, a Level 2 adjacency is established. This is the default.
level-2-only	A Level 2 adjacency is established if and only if the neighbor is configured exclusively to be a Level 2 router.

[no] isis csnp-interval seconds {level-1 | level-2}

To configure the IS-IS complete sequence number PDUs (CSNP) interval, use the isis csnp-interval interface configuration command. To restore the default value, use the no form of this command.

seconds	Interval of time between transmission of CSNPs on multiaccess networks. This interval only applies for the designated router. The default is 10 seconds.
level-1	Configures the interval of time between transmission of CSNPs for Level 1 independently.
level-2	Configures the interval of time between transmission of CSNPs for Level 2 independently.

isis hello-interval seconds {level-1 | level-2}
no isis hello-interval {level-1 | level-2}

To specify the length of time between Hello packets that the router sends, use the isis hello-interval interface configuration command. To restore the default value, use the no form of this command.

seconds	Unsigned integer value. A value three times the hello interval seconds is advertised as the holdtime in the hello packets transmitted. It must be the same for all routers attached to a common network. With smaller hello intervals, topological changes are detected faster, but there is more routing traffic. The default is 10 seconds.
level-1	Configures the hello interval for Level 1 independently. Use this on X.25, SMDS, and Frame Relay multiaccess networks.
level-2	Configures the hello interval for Level 2 independently. Use this on X.25, SMDS, and Frame Relay multiaccess networks.

isis metric default-metric [delay-metric [expense-metric [error-metric]]]
{level-1 | level-2}
no isis metric {level-1 | level-2}

To configure the metric for an interface, use the isis metric interface configuration command. To restore the default metric value, use the no form of this command.

default-metric	Metric used for the redistributed route. The default metric is used as a value for the IS-IS metric. This is the value assigned when there is no QOS routing performed. Only this metric is supported by Cisco routers. You can configure this metric for Level 1 and/or Level 2 routing. The range is from 0 to 63. The default value is 10.
delay-metric	Not supported.
expense-metric	Not supported.
error-metric	Not supported.
level-1	Router acts as a station router (Level 1) only.
level-2	Router acts as an area router (Level 2) only.

isis password password {level-1 | level-2}
no isis password {level-1 | level-2}

To configure the authentication password for an interface, use the isis password interface configuration command. To disable authentication for IS-IS, use the no form of this command.

password	Authentication password you assign for an interface.
level-1	Configures the authentication password for Level 1 independently. For Level 1 routing, the router acts as a station router only.
level-2	Configures the authentication password for Level 2 independently. For Level 2 routing, the router acts as an area router only.

isis priority value {level-1 | level-2}
no isis priority {level-1 | level-2}

To configure the priority of designated routers, use the isis priority interface configuration command. To reset the default priority, use the no form of this command.

value	Sets the priority of a router and is a number from 0 to 127. The default value is 64.
level-1	Sets the priority of a router for Level 1 independently.
level-2	Sets the priority of a router for Level 2 independently.

[no] isis retransmit-interval seconds

To configure the time between retransmission of IS-IS link-state PDU (LSP) retransmission for point-to-point links, use the isis retransmit-interval interface configuration command. To restore the default value, use the no form of this command.

seconds

Time in seconds between retransmission of IS-IS LSP retransmissions. It is an integer that should be greater than the expected round-trip delay between any two routers on the attached network. The default is 5 seconds.

[no] match as-path path-list-number

To match a BGP autonomous system path access list, use the match as-path route-map configuration command. To remove a path list entry, use the no form of this command.

path-list-
number

Autonomous system path access list. An integer from 1 through 199.

[no] match community-list community-list-number [exact]

To match a BGP community, use the match community-list route-map configuration command. To remove the community list entry, use the no form of this command.

community-list- number	Community list number in the range from 1 through 99.
exact	(Optional) Indicates an exact match is required. All of the communities and only those communities in the community list must be present.

[no] match interface type number...type number

To distribute any routes that have their next hop out one of the interfaces specified, use the match interface route-map configuration command. To remove the match interface entry, use the no form of this command.

type	Interface type.
number	Interface number.

[no] match ip address access-list-number...access-list-number

To distribute any routes that have a destination network number address that is permitted by a standard access list, use the match ip address route-map configuration command. To remove the match ip address entry, use the no form of this command.

access-list-number

Number of an access list. It can be an integer from 1 through 99.

[no] match ip next-hop access-list-number...access-list-number

To redistribute any routes that have a next-hop router address passed by one of the access lists specified, use the match ip next-hop route-map configuration command. To remove the next-hop entry, use the no form of this command.

access-list-number

Number of an access list. It can be an integer from 1 through 99.

[no] match ip route-source access-list-number...access-list-number

To redistribute routes that have been advertised by routers at the address specified by the access lists, use the match ip route-source route-map configuration command. To remove the route-source entry, use the no form of this command.

access-list-number

Number of an access list. It can be an integer from 1 through 99.

[no] match metric metric-value

To redistribute routes with the metric specified, use the match metric route-map configuration command. To remove the entry, use the no form of this command.

metric-value

Route metric. This may be an IGRP five-part metric. A metric value from 0 through 4294967295.

[no] match route-type {local | internal | external [type-1 | type-2] |
level-1 | level-2}

To redistribute routes of the specified type, use the match route-type route-map configuration command. To remove the route-type entry, use the no form of this command.

local	Locally generated BGP routes.
internal	OSPF intra-area and interarea routes or Enhanced IGRP internal routes.
external [type-1 \| type-2]	OSPF external routes, or enhanced IGRP external routes. For OSPF, external type-1 matches only type 1 external routes and external type-2 matches only type 2 external routes.
level-1	IS-IS Level 1 routes.
level-2	IS-IS Level 2 routes.

[no] match tag tag-value...tag-value

To redistribute routes in the routing table that match the specified tags, use the match tag command. To remove the tag entry, use the no form of this command.

tag-value

List of one or more route tags. An integer from 0 through 4294967295.

mbranch {group-address | group-name} branch-address [ttl]

To trace a branch of a multicast tree for a specific group, use the mbranch privileged EXEC command.

group-address	Address of the multicast group. This is a multicast IP address in four-part dotted notation.
group-name	Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
branch-address	Address of a router that is a member of the group. This is a unicast IP address in four-part dotted notation.
ttl	(Optional) Time-to-live value, in seconds, that is used in trace request packets sent to the branch router. The default value is 30 seconds.

[no] metric holddown

To keep new IGRP routing information from being used for a certain period of time, use the metric holddown router configuration command. To disable this feature, use the no form of this command.

[no] metric maximum-hops hops

To have the IP routing software to advertise as unreachable those routes with a hop count higher than is specified by the command (IGRP only), use the metric maximum-hops router configuration command. To reset the value to the default, use the no form of this command.

hops

Maximum hop count (in decimal). The default value is 100 hops; the maximum number of hops that can be specified is 255. The default is 100.

metric weights tos k1 k2 k3 k4 k5
no metric weights

To allow the tuning of the IGRP or Enhanced IGRP metric calculations, use the metric weights router configuration command. To reset the values to their defaults, use the no form of this command.

tos	Type of service. Currently, it must always be zero.
k1-k5	Constants that convert an IGRP or Enhanced IGRP metric vector into a scalar quantity. The default values are as follows: k1 = 1; k2 = 0; k3 = 1; k4 = 0; k5 = 0.

mrbranch {group-address | group-name} branch-address [ttl]

To trace a branch of a multicast tree for a group in the reverse direction, use the mrbranch EXEC command.

group-address	Address of the multicast group. This is a multicast IP address in four-part dotted notation.
group-name	Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
branch-address	Address of a router that is a member of the group. This is a unicast IP address in four-part dotted notation.
ttl	(Optional) Time-to-live value, in hops, that is used in trace request packets sent to the branch router. The default value is 30.

[no] neighbor ip-address

To define a neighboring router with which to exchange routing information, use this form of the neighbor router configuration command. To remove an entry, use the no form of this command.

ip-address

IP address of a peer router with which routing information will be exchanged.

[no] neighbor ip-address [priority number] [poll-interval seconds]

To configure OSPF routers interconnecting to nonbroadcast networks, use this form of the neighbor router configuration command. To remove a configuration, use the no form of this command.

ip-address	Interface IP address of the neighbor.
priority number	(Optional) 8-bit number indicating the router priority value of the nonbroadcast neighbor associated with the IP address specified. The default is 0.
poll-interval seconds	(Optional) Unsigned integer value reflecting the poll interval. RFC 1247 recommends that this value should be much larger than the hello interval. The default is 120 seconds.

[no] neighbor {address | tag} advertisement-interval seconds

To set the minimum interval between the sending of BGP routing updates, use the neighbor advertisement-interval router configuration command. To remove an entry, use the no form of this command.

address	Neighbor address.
tag	Neighbor tag.
seconds	Time in seconds. Integer from 0 through 600. The default is 30 for external peers and 5 for internal peers.

[no] neighbor any [access-list-number]

To control how neighbor entries are added to the routing table for both EGP and BGP, use the neighbor any router configuration command. To remove a configuration, use the no form of this command.

access-list-number

(Optional) Access list number the neighbor must be accepted by to be allowed to peer with the EGP or BGP process. If no list is specified, any neighbor will be allowed to peer with the router.

[no] neighbor any third-party ip-address [internal | external]

To configure an EGP process that determines which neighbors are treated as the next hop in EGP advertisements, use the neighbor any third-party router configuration command. To remove a configuration, use the no form of this command.

ip-address	IP address of the third-party router that is to be the next hop in EGP advertisements.
internal	(Optional) Indicates that the third-party router should be listed in the internal section of the EGP update.
external	(Optional) Indicates that the third-party router should be listed in the external section of the EGP update.

[no] neighbor template-name configure-neighbors

To have the router treat temporary neighbors that have been accepted by a template as if they had been configured manually, use the neighbor configure-neighbors router configuration command. To restore the default, use the no form of this command.

template-name

User-selectable designation that identifies a particular template. This can be an arbitrary word.

[no] neighbor ip-address distribute-list access-list-number {in | out}

To distribute BGP neighbor information as specified in an access list, use the neighbor distribute-list router configuration command. To remove an entry, use the no form of this command.

ip-address	Neighbor's IP address.
access-list-number	Predefined access list number. Only standard access lists can be used with this command.
in	Access list is applied to incoming advertisements to that neighbor.
out	Access list is applied to outgoing advertisements from that neighbor.

neighbor ip-address ebgp-multihop
no neighbor ip-address

To accept and attempt BGP connections to external peers residing on networks that are not directly connected, use the neighbor ebgp-multihop router configuration command. To return to the default, use the no form of this command.

ip-address

IP address of the BGP-speaking neighbor.

[no] neighbor ip-address filter-list access-list-number {in | out | weight
weight}

To set up BGP filter, use the neighbor filter-list router configuration command. To disable this function, use the no form of this command.

ip-address	IP address of the neighbor.
access-list-number	Number of an access for the autonomous system path. You define this access list with the ip as-path access-list command.
in	Access list to incoming routes.
out	Access list to outgoing routes.
weight weight	Assigns a relative importance to incoming routes matching autonomous system paths. Acceptable values are 0 to 65535.

neighbor template-name neighbor-list access-list-number
no neighbor template-name neighbor-list

To configure BGP to support anonymous neighbor peers by configuring a neighbor template, use the neighbor neighbor-list router configuration command. To delete a template, use the no form of this command.

template-name	User-selectable designation that identifies a particular template (an arbitrary word).
access-list-number	Number of an access list. It can be a number in the range 1 through 99.

[no] neighbor ip-address next-hop-self

To disable next-hop processing of BGP updates on the router, use the neighbor next-hop-self router configuration command. To disable this feature, use the no form of this command.

ip-address

IP address of the BGP-speaking neighbor.

[no] neighbor ip-address remote-as number

To add an entry to the BGP neighbor table, use the neighbor remote-as router configuration command. To remove an entry from the table, use the no form of this command.

ip-address	Neighbor's IP address.
number	AS to which the neighbor belongs.

[no] neighbor {address | tag} route-map route-map-name {in | out}

To apply a route map to incoming or outgoing routes, use the neighbor route-map router configuration command. To remove a route map, use the no form of this command.

address	Neighbor's IP address.
tag	Neighbor tag.
route-map-name	Name of route map.
in	Apply to incoming routes.
out	Apply to outgoing routes.

[no] neighbor ip-address send-community

To specify that a COMMUNITIES attribute should be sent to a BGP neighbor, use the neighbor send-community router configuration command. To remove the entry, use the no form of this command.

ip-address

Neighbor's IP address.

[no] neighbor ip-address third-party third-party-ip-address
[internal | external]

To send updates regarding EGP third-party routers, use the neighbor third-party router configuration command. To disable these updates, use the no form of this command.

ip-address	IP address of the EGP peer.
third-party-ip-address	Address of the third-party router on the network shared by the Cisco router and the EGP peer specified by ip-address.
internal	(Optional) Indicates that the third-party router should be listed in the internal section of the EGP update. This is the default.
external	(Optional) Indicates that the third-party router should be listed in the external section of the EGP update.

[no] neighbor ip-address update-source interface

To have the router allow internal BGP sessions to use any operational interface for TCP connections, use the neighbor update-source router configuration command. To restore the interface assignment to the closest interface, which is called the best local address, use the no form of this command.

ip-address	IP address of the BGP-speaking neighbor.
interface	Loopback interface.

[no] neighbor ip-address version value

To configure the router to accept only a particular version, use the neighbor version router configuration command. To use the default version level of a neighbor, use the no form of this command.

ip-address	IP address of the BGP-speaking neighbor.
version value	Version number. The version can be set to 2 to force the router to only use Version 2 with the specified neighbor. The default is to use Version 4 of BGP and dynamically negotiate down to Version 2 if requested.

[no] neighbor ip-address weight weight

To assign a weight to a neighbor connection, use the neighbor weight router configuration command. To remove a weight assignment, use the no form of this command.

ip-address	Neighbor's IP address.
weight weight	Weight to assign. Acceptable values are 0 to 65535. Routes learned through another BGP peer have a default weight of 0 and routes sourced by the local router have a default weight of 32768.

[no] net network-entity-title

To configure a Network Entity Title (NET) for the routing process, use the net router configuration command. To remove a NET, use the no form of this command.

network-entity-title

NET that specifies the area address and the system ID for an IS-IS routing process. This argument can be either an address or a name.

[no] network network-number mask network-mask

To specify the list of networks for the BGP routing process, use this form of the network router configuration command. To remove an entry, use the no form of this command.

network-number	IP address of the network.
mask network-mask	(Optional) Network mask address.

[no] network network-number

To specify the list of networks for the EGP routing process, use this form of the network router configuration command. To remove an entry, use the no form of this command.

network-number

IP address of a peer router with which routing information will be exchanged.

[no] network network-number

To specify a list of networks for the Enhanced IGRP, IGRP, or RIP routing process, use the network router configuration command. To remove a network from the list, use the no form of this command.

network-number

IP address of the directly connected network.

[no] network address wildcard-mask area area-id

To define the interfaces on which OSPF runs and to define the area ID for those interfaces, use the network area router configuration command. To disable OSPF routing for interfaces defined with the address wildcard-mask pair, use the no form of this command.

address	IP address.
wildcard-mask	IP-address-type mask that includes "don't care" bits.
area-id	Area that is to be associated with the OSPF address range. It can be specified as either a decimal value or as an IP address. If you intend to associate areas with IP subnets, you can specify a subnet address as the area-id.

[no] network address backdoor

To specify a backdoor route to a BGP border router that will provide better information about the network, use the network backdoor router configuration command. To remove an address from the list, use the no form of this command.

address

IP address of the network to which you want a backdoor route.

[no] network address weight weight

To assign an absolute weight to a BGP network, use the network weight command. To delete an entry, use the no form of the command.

address	IP address of the network.
weight weight	Absolute weight. Integer from 0 to 65535. By default, weight is unmodified and is zero unless it has been modified by other router configuration commands.

[no] offset-list {in | out} offset [access-list-number | [type number]]

To add an offset to incoming and outgoing metrics to routes learned via RIP and IGRP, use the offset-list router configuration command. To remove an offset list, use the no form of this command.

in	Applies the access list to incoming metrics.
out	Applies the access list to outgoing metrics.
offset	Positive offset to be applied to metrics for networks matching the access list. If the offset is zero, no action is taken.
access-list- number	(Optional) Access list to be applied. If unspecified, the argument supplied to offset is applied to all metrics. If offset is zero, no action is taken. For IGRP, the offset is added to the delay component only. Must be a standard access list.
type	(Optional) Interface type to which the offset-list is applied.
number	(Optional) Interface number to which the offset-list is applied.

[no] ospf auto-cost-determination

To control how OSPF calculates default metrics for the interface, use the ospf auto-cost-determination router configuration command. To disable this feature, use the no form of this command.

[no] passive-interface type number

To disable sending routing updates on an interface, use the passive-interface router configuration command. To reenable the sending of routing updates, use the no form of this command.

type	Interface type.
number	Interface number.

[no] redistribute protocol [process-id] {level-1 | level-1-2 | level-2}
[metric metric-value] [metric-type type-value] [match {internal |
external 1 | external 2}] [tag tag-value] [route-map map-tag]
[weight weight] [subnets]

To redistribute routes from one routing domain into another routing domain, use the redistribute router configuration command. To disable redistribution, use the no form of this command.

protocol	Source protocol from which routes are being redistributed. It can be one of the following keywords: bgp, egp, igrp, isis, ospf, static [ip], connected and rip. The keyword static [ip] is used to redistribute IP static routes. The optional ip keyword is used when redistributing into IS-IS. The keyword connected refers to routes which are established automatically by virtue of having enabled IP on an interface. For routing protocols such as OSPF and IS-IS, these routes will be redistributed as external to the autonomous system.
process-id	(Optional) For bgp, egp, or igrp, this is an autonomous system number, which is a 16-bit decimal number. For isis, this is an optional tag that defines a meaningful name for a routing process. You can specify only one IS-IS process per router. Creating a name for a routing process means that you use names when configuring routing. For ospf, this is an appropriate OSPF process ID from which routes are to be redistributed. This identifies the routing process. This value takes the form of a nonzero decimal number. For rip, no process-id value is needed.
level-1	For IS-IS, Level 1 routes are redistributed into other IP routing protocols independently.
level-1-2	For IS-IS, both Level 1 and Level 2 routes are redistributed into other IP routing protocols.
level-2	For IS-IS, Level 2 routes are redistributed into other IP routing protocols independently.
metric metric-value	(Optional) Metric used for the redistributed route. If a value is not specified for this option, and no value is specified using the default-metric router configuration command, the default metric value is 0. Use a value consistent with the destination protocol.
metric-type type-value	(Optional) For OSPF, the external link type associated with the default route advertised into the OSPF routing domain. It can be one of two values: 1—Type 1 external route 2—Type 2 external route If a metric-type is not specified, the router adopts a Type 2 external route. For IS-IS, it can be one of two values: internal—IS-IS metric which is < 63. external—IS-IS metric which is > 64 < 128. The default is internal.
match {internal \| external 1 \| external 2}	(Optional) For OSPF, the criteria by which OSPF routes are redistributed into other routing domains. It an be one of the following: internal—Routes that are internal to a specific autonomous system. external 1—Routes that are external to the autonomous system, but are imported into OSPF as type 1 external route. external 2—Routes that are external to the autonomous system, but are imported into OSPF as type 2 external route.
tag tag-value	(Optional) 32-bit decimal value attached to each external route. This is not used by the OSPF protocol itself. It may be used to communicate information between Autonomous System Boundary Routers. If none is specified, then the remote autonomous system number is used for routes from BGP and EGP; for other protocols, zero (0) is used.
route-map	(Optional) Route map should be interrogated to filter the importation of routes from this source routing protocol to the current routing protocol. If not specified, all routes are redistributed. If this keyword is specified, but no route map tags are listed, no routes will be imported.
map-tag	(Optional) Identifier of a configured route map.
weight weight	Network weight when redistributing into BGP. An integer between 0 and 65535.
subnets	(Optional) For redistributing routes into OSPF, the scope of redistribution for the specified protocol.

[no] route-map map-tag [[permit | deny] | sequence-number]

To define the conditions for redistributing routes from one routing protocol into another, use the route-map global configuration command and the route-map configuration commands match and set. To delete an entry, use the no route-map command.

map-tag	Defines a meaningful name for the route map. The redistribute router configuration command uses this name to reference this route map. Multiple route maps may share the same map tag name.
permit	(Optional) If the match criteria are met for this route map, and permit is specified, the route is redistributed as controlled by the set actions. If the match criteria are not met, and permit is specified, the next route map with the same map-tag is tested. If a route passes none of the match criteria for the set of route maps sharing the same name, it is not redistributed by that set.
deny	(Optional) If the match criteria are met for the route map, and deny is specified, the route is not redistributed, and no further route maps sharing the same map tag name will be examined.
sequence-number	(Optional) Number that indicates the position a new route map is to have in the list of route maps already configured with the same name. If given with the no form of this command, it specifies the position of the route map that should be deleted.

[no] router bgp autonomous-system

To configure the Border Gateway Protocol (BGP) routing process, use the router bgp global configuration command. To remove a routing process, use the no form of this command.

autonomous-system

Number of an autonomous system that identifies the router to other BGP routers and tags the routing information passed along.

[no] router egp remote-as

To configure the Exterior Gateway Protocol (EGP) routing process, use the router egp global configuration command. To turn off an EGP routing process, use the no router egp command.

remote-as

Autonomous system number the router expects its peers to be advertising in their EGP messages.

[no] router egp 0

To specify that a router should be considered a core gateway, use the router egp 0 global configuration command. To disable this function, use the no form of this command.

[no] router eigrp autonomous-system-number

To configure the IP Enhanced IGRP routing process, use the router eigrp global configuration command. To shut down the routing process on the specified autonomous system, use the no form of this command.

autonomous-system-number

Number of the autonomous system. It identifies the routes to the other IP Enhanced IGRP routers and is used to tag the routing information.

[no] router igrp autonomous-system

To configure the Interior Gateway Routing Protocol (IGRP) routing process, use the router igrp global configuration command. To shut down an IGRP routing process, use the no form of this command.

autonomous-system

Number of a process that identifies the routes to the other IGRP routers. It is also used to tag the routing information. If you have an autonomous system number, you can use it for the process number.

[no] router isis [tag]

To enable the IS-IS routing protocol and to specify an IS-IS process for IP, use the router isis global configuration command. To disable IS-IS routing, use the no form of this command.

tag

(Optional) Meaningful name for a routing process. If it is not specified, a null tag is assumed and the process is referenced with a null tag. This name must be unique among all IP router processes for a given router.

[no] router ospf process-id

To configure an OSPF routing process, use the router ospf global configuration command. To terminate an OSPF routing process, use the no form of this command.

process-id

Internally used identification parameter for an OSPF routing process. It is locally assigned and can be any positive integer. A unique value is assigned for each OSPF routing process.

[no] router rip

To configure the Routing Information Protocol (RIP) routing process, use the router rip global configuration command. To turn off the RIP routing process, use the no form of this command.

[no] set automatic-tag

To automatically compute the tag value, use the set automatic-tag route-map configuration command. To disable this function, use the no form of this command.

[no] set community community-number [additive]

To set the BGP COMMUNITIES attribute, use the set community route-map configuration command. To delete the entry, use the no form of this command.

community-number	Valid values are 1 through 4294967200, internet, no-export, or no-advertise.
additive	(Optional) Add the community to the already existing communities.

[no] set level {level-1 | level-2 | level-1-2 | stub-area | backbone}

To indicate where to import routes, use the set level route-map configuration command. To delete an entry, use the no form of this command.

level-1	Import into a Level 1 area.
level-2	Import into Level 2 subdomain. For IS-IS destinations, this is the default.
level-1-2	Import into Level 1 and Level 2.
stub-area	Import into OSPF NSSA area.
backbone	Import into OSPF backbone area. For OSPF destinations, this is the default.

[no] set local-preference value

To specify a preference value for autonomous system path, use the set local-preference route-map configuration command. To delete an entry, use the no form of this command.

value

Preference value. An integer from 0 through 4294967295. The default is 100.

[no] set metric metric-value

To set the metric value for the destination routing protocol, use the set metric route-map configuration command. To return to the default metric value, use the no form of this command.

metric-value

Metric value or IGRP bandwidth in kilobits per second. An integer from 0 through 294967295.

[no] set metric-type {internal | external | type-1 | type-2}

To set the metric type for the destination routing protocol, use the set metric-type route-map command. To return to the default, use the no form of this command.

internal	IS-IS internal metric.
external	IS-IS external metric.
type-1	OSPF external type 1 metric.
type-2	OSPF external type 2 metric.

[no] set next-hop next-hop

To specify the address of the next hop, use the set next-hop route-map configuration command. To delete an entry, use the no form of this command.

next-hop

IP address of the next hop router.

set origin {igp | egp autonomous-system | incomplete}

To set the BGP origin code, use the set origin route-map configuration command. To delete an entry, use the no form of this command.

igp	Remote EGP.
egp	Local IGP.
autonomous-system	Remote autonomous system. This is an integer from 0 through 65535.
incomplete	Unknown heritage.

[no] set tag tag-value

To set a tag value of the destination routing protocol, use the set tag route-map configuration command. To delete the entry, use the no form of this command.

tag-value

Name for the tag. Integer from 0 through 4294967295.

[no] set weight weight

To specify the BGP weight for the routing table, use the set weight route-map configuration command. To delete an entry, use the no form of this command.

weight

Weight value. From 0 through 65535.

show ip bgp [network] [network-mask] [subnets]

To display entries in the BGP routing table, use the show ip bgp EXEC command.

network	(Optional) Network number, entered to display a particular network in the BGP routing table.
network-mask	(Optional) Displays all BGP routes matching the address/mask pair.
subnets	(Optional) Displays route and more specific routes.

show ip bgp cidr-only

To display routes with non natural network masks, use the show ip bgp cidr-only privileged EXEC command.

show ip bgp community community-number [exact]

To display routes that belong to specified BGP communities, use the show ip bgp community EXEC command.

community-number	Valid value is community number in the range from 1 through 4294967200, internet, no-export, or no-advertise.
exact	(Optional) Displays only routes that have exactly the same specified communities.

show ip bgp community-list community-list-number [exact]

To display routes that are permitted by the BGP community list, use the show ip bgp community-list EXEC command.

community-list- number	Community list number in the range from 1 through 99.
exact	(Optional) Displays only routes that have an exact match.

show ip bgp filter-list access-list-number

To display routes that conform to a specified filter list, use the show ip bgp filter-list privileged EXEC command.

access-list-number

Number of an access list. It can be a number from 1 through 199.

show ip bgp neighbors [address [routes | paths]]

To display information about the TCP and BGP connections to individual neighbors, use the show ip bgp neighbors EXEC command.

address	(Optional) Address of the neighbor whose routes you have learned from.
routes	(Optional) Displays routes to specified neighbors.
paths	(Optional) Displays autonomous system paths to specified neighbor.

show ip bgp paths

To display all the BGP paths in the database, use the show ip bgp paths EXEC command.

show ip bgp regexp regular-expression

To display routes matching the regular expression, use the show ip bgp regexp privileged EXEC command.

regular-expression

Regular-expression to match the BGP autonomous system paths.

show ip bgp summary

To display the status of all BGP connections, use the show ip bgp summary EXEC command.

show ip dvmrp route [ip-address]

To display the contents of the DVMRP routing table, use the show ip dvmrp route EXEC command.

ip-address

(Optional) IP address of an entry in the DVMRP routing table.

show ip egp

To display statistics about EGP connections and neighbors, use the show ip egp EXEC command.

show ip eigrp neighbors [type number]

To display the neighbors discovered by IP Enhanced IGRP, use the show ip eigrp neighbors EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.

show ip eigrp topology [autonomous-system-number |
[[ip-address] mask]]

To display the IP Enhanced IGRP topology table, use the show ip eigrp topology EXEC command.

autonomous-system-number	(Optional) Autonomous system number.
ip-address	(Optional) IP address. When specified with a mask, a detailed description of the entry is provided.
mask	(Optional) Subnet mask.

show ip eigrp traffic [autonomous-system-number]

To display the number of IP Enhanced IGRP packets sent and received, use the show ip eigrp traffic EXEC command.

autonomous-system-number

(Optional) Autonomous system number.

show ip igmp groups [group-name | group-address | type number]

To display the multicast groups that are directly connected to the router and that were learned via IGMP, use the show ip igmp groups EXEC command.

group-name	(Optional) Name of the multicast group, as defined in the DNS hosts table.
group-address	(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.
type	(Optional) Interface type.
number	(Optional) Interface number.

show ip igmp interface [type number]

To display multicast-related information about an interface, use the show ip igmp interface EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.

show ip irdp

To display IRDP values, use the show ip irdp EXEC command.

show ip mroute [group-name | group-address] [summary] [count]
show ip mroute [group-name [source-address] | group-address
[source-address]]

To display the contents of the IP multicast routing table, use the show ip mroute EXEC command.

group-name	(Optional) Name of the multicast group, as defined in the DNS hosts table.
group-address	(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.
summary	(Optional) Displays a one-line, abbreviated summary of each entry in the IP multicast routing table.
count	(Optional) Displays statistics about the group, source router, and multicast packets.
source-address	(Optional) Address of a router that is a member of the multicast group.

show ip ospf [process-id]

To display general information about OSPF routing processes, use the show ip ospf EXEC command.

process-id

(Optional) Process ID. If this argument is included, only information for the specified routing process is displayed.

show ip ospf border-routers

To display the internal OSPF routing table entries to an Area Border Router (ABR) and Autonomous System Boundary Router (ASBR), use the show ip ospf border-routers privileged EXEC command.

show ip ospf [process-id area-id] database
show ip ospf [process-id area-id] database [router] [link-state-id]
show ip ospf [process-id area-id] database [network] [link-state-id]
show ip ospf [process-id area-id] database [summary] [link-state-id]
show ip ospf [process-id area-id] database [asbr-summary]
[link-state-id]
show ip ospf [process-id] database [external] [link-state-id]
show ip ospf [process-id area-id] database [database-summary]

Use the show ip ospf database EXEC command to display lists of information related to the OSPF database for a specific router. The various forms of this command deliver information about different OSPF link state advertisements.

process-id	(Optional) Internally used identifier. It is locally assigned and can be any positive integer number. The number used here is the number assigned administratively when enabling the OSPF routing process.
area-id	(Optional) Area number associated with the OSPF address range defined in the network router configuration command used to define the particular area.
link-state-id	(Optional) Portion of the IP environment that is being described by the advertisement. The value entered depends on the advertisement's LS type. It must be entered in the form of an IP address. When the link state advertisement is describing a network, the link-state-id can take one of two forms: —Network's IP address (as in type 3 summary link advertisements and autonomous system external link advertisements). —Derived address obtained from the link state ID. (Note that masking a network links advertisement's link state ID with the network's subnet mask yields the network's IP address.) When the link state advertisement is describing a router, the link state ID is always the described router's OSPF router ID. When an autonomous system external advertisement (LS Type of 5) is describing a default route, its link state ID is set to Default Destination (0.0.0.0).
router	(Optional) Displays information about router link states.
network	(Optional) Displays information about network link states.
summary	(Optional) Displays summary information about network link states.
asbr-summary	(Optional) Displays summary information about Autonomous System Boundary Router link states.
external	(Optional) Displays information about autonomous system external link states.
database- summary	(Optional) Displays database summary information and totals.

show ip ospf interface [type number]

To display OSPF-related interface information, use the show ip ospf interface EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.

show ip ospf neighbor [type number] [neighbor-id] detail

To display OSPF-neighbor information on a per-interface basis, use the show ip ospf neighbor EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.
neighbor-id	(Optional) Neighbor ID.
detail	Display all neighbors given in detail (list all neighbors).

show ip ospf virtual-links

To display parameters about and the current state of OSPF virtual links, use the show ip ospf virtual-links EXEC command.

show ip pim interface [type number]

To display information about interfaces configured for PIM, use the show ip pim interface EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.

show ip pim neighbor [type number]

To list the PIM neighbors discovered by the router, use the show ip pim neighbor EXEC command.

type	(Optional) Interface type.
number	(Optional) Interface number.

show ip pim rp [group-name | group-address]

To display the rendezvous point (RP) routers associated with a sparse-mode multicast group, use the show ip pim rp EXEC command.

group-name	(Optional) Name of the multicast group, as defined in the DNS hosts table.
group-address	(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.

show ip protocols

To display the parameters and current state of the active routing protocol process, use the show ip protocols EXEC command.

show ip route [address [mask] [longer-prefixes]] | [protocol [process-id]]

Use the show ip route EXEC command to display the current state of the routing table.

address	(Optional) Address about which routing information should be displayed.
mask	(Optional) Argument for a subnet mask.
longer-prefixes	(Optional) The address and mask pair becomes a prefix and any routes that match that prefix are displayed.
protocol	(Optional) Name of a routing protocol; or the keyword connected, static, or summary. If you specify a routing protocol, use one of the following keywords: bgp, egp, eigrp, hello, igrp, isis, ospf, or rip.
process-id	(Optional) Number used to identify a process of the specified protocol.

show ip route summary

To display the current state of the routing table, use the show ip route summary EXEC command.

show ip route supernets-only

To display information about supernets, use the show ip route supernets-only privileged EXEC command.

show isis database [level-1] [level-2] [l1] [l2] [detail] [lspid]

To display the IS-IS link state database, use the show isis database EXEC command.

level-1	(Optional) Displays the IS-IS link state database for Level 1.
level-2	(Optional) Displays the IS-IS link state database for Level 2.
l1	(Optional) Abbreviation for the option level-1.
l2	(Optional) Abbreviation for the option level-2.
detail	(Optional) When specified, the contents of each LSP is displayed. Otherwise, a summary display is provided.
lspid	(Optional) Link-state protocol ID. When specified, the contents of a single LSP is displayed by its ID number.

show route-map [map-name]

To display configured route-maps, use the show route-map EXEC command.

map-name

(Optional) Name of a specific route-map.

[no] summary-address address mask {level-1 | level-1-2 | level-2}

Use the summary-address router configuration command to create aggregate addresses for IS-IS or OSPF. The no summary-address command restores the default.

address	Summary address designated for a range of addresses.
mask	IP subnet mask used for the summary route.
level-1	Only routes redistributed into Level 1 are summarized with the configured address/mask value. This keyword does not apply to OSPF.
level-1-2	The summary router is injected into both a Level 1 area and a Level 2 subdomain. This keyword does not apply to OSPF.
level-2	Routes learned by Level 1 routing will be summarized into the Level 2 backbone with the configured address/mask value. This keyword does not apply to OSPF.

[no] synchronization

To disable the synchronization between BGP and your IGP, use the synchronization router configuration command. To enable a router to advertise a network route without waiting for the IGP, use the no form of this command.

[no] table-map route-map-name

To modify metric and tag values when the IP routing table is updated with BGP learned routes, use the table-map router configuration command. To disable this function, use the no form of the command.

route-map-name

Route map name, from route-map command.

timers basic update invalid holddown flush [sleeptime]
no timers basic

To adjust EGP, RIP, or IGRP network timers, use the timers basic router configuration command. To restore the default timers, use the no form of this command.

update	Rate in seconds at which updates are sent. This is the fundamental timing parameter of the routing protocol.
invalid	Interval of time in seconds after which a route is declared invalid; it should be three times the value of update. A route becomes invalid when there is an absence of updates that refresh the route. The route then enters holddown. The route is marked inaccessible and advertised as unreachable. However, the route is still used for forwarding packets.
holddown	Interval in seconds during which routing information regarding better paths is suppressed. It should be at least three times the value of update. A route enters into a holddown state when an update packet is received that indicates the route is unreachable. The route is marked inaccessible and advertised as unreachable. However, the route is still used for forwarding packets. When holddown expires, routes advertised by other sources are accepted and the route is no longer inaccessible.
flush	Amount of time in seconds that must pass before the route is removed from the routing table; the interval specified must be at least the sum of invalid and holddown. If it is less than this sum, the proper holddown interval cannot elapse, which results in a new route being accepted before the holddown interval expires.
sleeptime	(Optional) For IGRP only, interval in milliseconds for postponing routing updates in the event of a flash update. The sleeptime value should be less than the update time. If the sleeptime is greater than the update time, routing tables will become unsynchronized.

timers bgp keepalive holdtime
no timers bgp

To adjust BGP network timers, use the timers bgp router configuration command. To reset the BGP timing defaults, use the no form of this command.

keepalive	Frequency, in seconds, with which the router sends keepalive messages to its peer. The default is 60 seconds.
holdtime	Interval, in seconds, after not receiving a keepalive message that the router declares a peer dead. The default is 180 seconds.

timers egp hello polltime
no timers egp

To adjust EGP Hello and polltime network timers, use the timers egp router configuration command. The no timers egp command resets the EGP timing defaults.

hello	Frequency, in seconds, with which the router sends hello messages to its peer. The default is 60 seconds.
polltime	Interval, in seconds, for how frequently to exchange updates. The default is 180 seconds.

[no] timers spf spf-delay spf-holdtime

To configure the delay time between when OSPF receives a topology change and when it starts a Shortest Path First (SPF) calculation, and the hold time between two consecutive SPF calculations, use the timers spf router configuration command. To return to the default timer values, use the no form of this command.

spf-delay	Delay time, in seconds, between when OSPF receives a topology change and when it starts a SPF. calculation. It can be an integer from 0 to 65535. The default time is 5 seconds. A value of 0 means that there is no delay; that is, the SPF calculation is started immediately.
spf-holdtime	Minimum time, in seconds, between two consecutive SPF calculations. It can be an integer from 0 to 65535. The default time is 10 seconds. A value of 0 means that there is no delay; that is, two consecutive SPF calculations can be done one immediately after the other.

[no] traffic share {balanced | min}

To control how traffic is distributed among routes when there are multiple routes for the same destination network that have different costs, use the traffic-share router configuration command. To disable this function, use the no form of the command.

balanced	Distributes traffic proportionately to the ratios of the metrics.
min	Uses routes that have minimum costs.

[no] validate-update-source

To have the router to validate the source IP address of incoming routing updates for RIP and IGRP routing protocols, use the validate-update-source router configuration command. To disable this function, use the no form of this command.

variance multiplier
no variance

To control load balancing in an IP Enhanced IGRP-based internetwork, use the variance router configuration command. To reset the variance to the default value, use the no form of this command.

multiplier

Metric value used for load balancing. It can be a value from 1 to 128. The default is 1, which means equal-cost load balancing.

Table of Contents

IP Routing Protocols Commands