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This chapter describes the function and displays the syntax of each DECnet command. For more information about defaults and usage guidelines, see the corresponding chapter of the Router Products Command Reference publication.
access-list access-list-number {permit | deny} source source-mask
no access-list
To create a standard access list, use the access-list global configuration command. Use the no form of this command to delete the entire access list.
| access-list-number | Integer you choose between 300 and 399 that uniquely identifies the access list. |
| permit | Permits access when there is an address match. |
| deny | Denies access when there is an address match. |
| source | Source address. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All addresses are in decimal. |
| source-mask | Mask to be applied to the address of the source node. Bits are set wherever the corresponding bits in the address should be ignored. All masks are in decimal. |
access-list access-list-number {permit | deny} source source-mask
[destination] [destination-mask]
no access-list
To create an extended access list, use the access-list global configuration command. Use the no form of this command to delete the entire access list.
| access-list-number | Integer you choose between 300 and 399 that uniquely identifies the access list. |
| permit | Permits access when there is an address match. |
| deny | Denies access when there is an address match. |
| source | Source address. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All addresses are in decimal. |
| source-mask | Mask to be applied to the address of the source node. All masks are in decimal. |
| destination | (Optional) Destination node's DECnet address in decimal format. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. |
| destination-mask | (Optional) Destination mask. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All masks are in decimal. |
access-list access-list-number {permit | deny} source source-mask
[destination destination-mask eq | neq [source-object |
destination-object | identification | any]]
no access-list
The optional argument source-object consists of the following string:
src [[eq | neq | gt | lt] object-number] [exp regular expression]
[uic [group, user]]
The optional argument destination-object consists of the following string:
dst [[eq | neq | gt | lt] object-number] [exp regular expression]
[uic [group, user]]
The optional argument identification consists of the following string:
[id regular expression] [password regular expression] [account
regular expression]
To create an access list that filters connect initiate packets, use the access-list global configuration command. Use the no form of this command to disable the access list.
| access-list-number | Integer you choose between 300 and 399 that uniquely identifies the access list. |
| permit | Permits access when there is an address match. |
| deny | Denies access when there is an address match. |
| source | Source address. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All addresses are in decimal. |
| source-mask | Mask to be applied to the address of the source node. All masks are in decimal. |
| destination | (Optional) Destination node's DECnet address in decimal format. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All addresses are in decimal. |
| destination-mask | (Optional) Destination mask. DECnet addresses are written in the form area.node. For example, 50.4 is node 4 in area 50. All masks are in decimal. |
| eq | neq | Use either of these keywords:
eq--item matches the packet if all the specified parts of source-object, destination-object, and identification match data in the packet. neq--item matches the packet if any of the specified parts do not match the corresponding entry in the packet. |
| source-object | (Optional) Contains the keyword src and one of the following optional keywords:
eq | neq | lt | gt--equal to, not equal to, less than, or greater than. These keywords must be followed by the argument object-number, a numeric DECnet object number. exp--stands for expression; followed by a regular expression that matches a string. uic--stands for user identification code; followed by a numeric user ID (UID) expression.The argument [group, user] is a numeric UID expression. In this case, the bracket symbols are literal; they must be entered. The group and user parts can be specified in decimal, in octal by prefixing the number with a 0, or in hex by prefixing the number with 0x. The uic expression is displayed in show displays as an octal number. |
| destination-object | (Optional) Contains the mandatory keyword dst and one of the following optional keywords:
eq | neq | lt | gt--equal to, not equal to, less than, or greater than. These keywords must be followed by the argument object-number, a numeric DECnet object number. exp--stands for expression; followed by a regular expression that matches a string. uic--stands for user identification code; followed by a numeric user ID (UID) expression. In this case, the bracket symbols are literal; they must be entered. The group and user parts can either be specified in decimal, in octal by prefixing the number with a 0, or in hex by prefixing the number with 0x. The uic expression is displayed in show displays as an octal number. |
| identification | (Optional) Uses any of the following three keywords:
id--regular expression; refers to user ID. password--regular expression; the password to the account. account--regular expression; the account string. |
| any | Item matches if any of the specified parts do match the corresponding entries for source-object, destination-object, or identification. |
clear decnet counters
To clear DECnet counters that are shown in the output of the show decnet traffic EXEC command, use the clear decnet counters EXEC command.
decnet access-group access-list number
To create a DECnet access group, use the decnet access-group interface configuration command.
| access-list-number | Either a standard or extended DECnet access list. A standard DECnet access list applies to destination addresses. The value (or values in the case of extended lists) can be in the range 300 through 399. |
decnet advertise decnet-area hops cost
no decnet advertise [decnet-area]
To configure border routers to propagate Phase IV areas through an OSI backbone, use the decnet advertise global configuration command. To disable this feature, use the no decnet advertise command.
| decnet-area | Phase IV area that you want propagated. |
| hops | Hop count to be associated with the route being advertised. The default is 0. |
| cost | Cost to be associated with the route being advertised. The default is 0. |
decnet [network-number] area-max-cost value
To set the maximum cost specification value for interarea routing, use the decnet area-max-cost global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). The default is network 0. |
| value | Maximum cost for a route to a distant area that the router may consider usable; the router treats as unreachable any route with a cost greater than the value you specify. A valid range for cost is from 1 through 1022. This parameter is only valid for area routers. The default is 1022. |
decnet [network-number] area-max-hops value
To set the maximum hop count value for interarea routing, use the decnet area-max-hops global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| value | Maximum number of hops for a usable route to a distant area. The router treats as unreachable any route with a count greater than the value you specify. A valid range for the hop count is from 1 through 30. The default is 30 hops. |
decnet congestion-threshold number
no decnet congestion-threshold
Use the decnet congestion-threshold interface configuration command to set the congestion-experienced bit if the output queue has more than the specified number of packets in it. A number value of zero or the no form of this command prevents this bit from being set. Use the no form of this command to remove the parameter setting and set it to 0.
| number | Number of packets that are allowed in the output queue before the system will set the congestion experience bit. This value is an integer between 0 and 0x7fff. The value zero prevents this bit from being set. Only relatively small integers are reasonable. The default is 1 packet. |
[no] decnet conversion nsap-prefix
To allow Phase IV routers (running Software Release 9.1 or later) to run in a Phase V network and vice versa, enable conversion with the decnet conversion global configuration command. To disable conversion, use the no form of this command.
| nsap-prefix | Value used for the IDP field when constructing NSAPs from a Phase IV address |
decnet cost cost-value
no decnet cost
To set a cost value for an interface, use the decnet cost interface configuration command. Use the no form of this command to disable DECnet routing for an interface.
| cost-value | Integer from 1 through 63. There is no default cost for an interface, although a suggested cost for FDDI is 1, for Ethernet is 4, and for serial links is greater than 10. |
decnet encapsulation {pre-dec | dec}
To provide DECnet encapsulation over Token Ring, use the decnet encapsulation interface configuration command.
| pre-dec | Configures routers for operation on the same Token Ring with routers running software versions prior to Release 9.1. In this mode, Cisco routers cannot communicate with non-Cisco equipment. Referred to as Cisco-style encapsulation. |
| dec | Provides encapsulation that is compatible with other Digital equipment. All Cisco routers must be running Software Release 9.1 or later. The default is dec. |
decnet hello-timer seconds
no decnet hello-timer
To change the interval for sending broadcast hello messages, use the decnet hello-timer interface configuration command. To restore the default value, use the no form of this command.
| seconds | Interval at which the router sends hello messages. It can be a decimal number in the range 1 through 8191 seconds. The default is 15 seconds. |
decnet in-routing-filter access-list-number
no decnet in-routing-filter
To provide access control to hello messages or routing information received on an interface, use the decnet in-routing-filter interface configuration command. Use the no form of this command to remove access control.
| access-list-number | Standard DECnet access list. This list applies to destination addresses. The value can be in the range 300 through 399. |
decnet first-network map virtual-address second-network real-address
To establish an address translation for selected nodes, use the decnet map global configuration command.
| first-network | DECnet network numbers in the range 0 through 3. |
| virtual-address | Numeric DECnet address (10.5, for example). |
| second-network | DECnet network number you map to; DECnet numbers range from 0 through 3. |
| real-address | Numeric DECnet address (10.5, for example). |
decnet [network-number] max-address value
To configure the router with a maximum number of node addresses, use the decnet max-address global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| value | A number less than or equal to 1023 that represents the maximum node address possible on the network. In general, all routers on the network should use the same value for this argument. The default is 1023. |
decnet [network-number] max-area area-number
To set the largest number of areas that the router can handle in its routing table, use the decnet max-area global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| area-number | Area number from 1 through 63. Like the decnet max-address global configuration command value, this argument controls the sizes of internal routing tables and of messages sent to other nodes. All routers on the network should use the same maximum address value. The default is 63. |
decnet [network-number] max-cost cost
To set the maximum cost specification for intra-area routing, use the decnet max-cost global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| cost | Cost from 1 through 1022. The default is 1022. |
decnet [network-number] max-hops hop-count
To set the maximum hop count specification value for intra-area routing, use the decnet max-hops global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| hop-count | Hop count from 1 through 30. The router ignores routes that have a hop count greater than the corresponding value of this parameter. The default is 30 hops. |
decnet [network-number] max-paths value
To define the maximum number of equal-cost paths to a destination that the router will keep in its routing table, use the decnet max-paths global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| value | Decimal number equal to the maximum number of equal-cost paths the router will save. The valid range is from 1 through 31. The default is 1. |
decnet [network-number] max-visits value
To set the limit on the number of times a packet can pass through a router, use the decnet max-visits global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| value | Number of times a packet can pass through a router. It can be a decimal number in the range 1 through 63. If a packet exceeds value, the router discards the packet. Digital recommends that the value of the max-visits parameter be at least twice that of the max-hops parameter, to allow packets to still reach their destinations when routes are changing. The default is 63 times. |
[no] decnet multicast-map multicast-address-type functional-address
Use the decnet multicast-map interface configuration command to specify a mapping between DECnet multicast addresses and Token Ring functional addresses, other than the default mapping. The no form of this command deletes the specified information.
| multicast-address-type | Type of multicast address that is used. The following are valid values:
iv-all-routers All Phase-IV routers iv-all-endnodes All Phase-IV endnodes iv-prime-all-routers All Phase IV Prime routers |
| functional-address | Functional MAC address that this multicast ID will map to. In the form of "c000.xxxx.yyyy." See Table 15-2 of the Router Products Command Reference publication for the default mapping. |
decnet [network-number] node-type {area | routing-iv}
To specify the node type, use the decnet node-type global configuration command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| area | Router participates in the DECnet routing protocol with other area routers, as described in the Digital documentation, and routes packets from and to routers in other areas. This is sometimes referred to as Level 2, or interarea, routing. An area router does not just handle interarea routing; it also acts as an intra-area or Level 1 router in its own area. |
| routing-iv | Router acts as an intra-area (standard DECnet Phase IV, Level 1 router) and ignores Level 2 routing packets. In this mode, it routes packets destined for other areas to a designated interarea router, exchanging packets with other end-nodes and routers in the same area. |
decnet out-routing-filter access-list-number
no decnet out-routing-filter
To provide access control to routing information being sent out on an interface, use the decnet out-routing-filter interface configuration command. Use the no form of this command to remove access control.
| access-list-number | Standard DECnet access list applying to destination addresses. The value can be in the range 300 through 399. |
decnet path-split-mode {normal | interim}
To specify how the router will split the routable packets between equal-cost paths, use the decnet path-split-mode global configuration command with the appropriate keyword.
| normal | Normal mode, where equal-cost paths are selected on a round-robin basis. This is the default. |
| interim | Traffic for any particular (higher-layer) session is always routed over the same path. This mode supports older implementations of DECnet (VMS Versions 4.5 and earlier) that do not support out-of-order packet caching. Other sessions may take another path, thus using equal-cost paths that a router may have for a particular destination. |
[no] decnet route-cache
To enable fast-switching, use the decnet route-cache interface configuration command. To disable fast switching, use the no form of this command.
decnet router-priority value
To elect a designated router to which packets will be sent when no destination is specified, use the decnet router-priority interface configuration command.
| value | Priority of the router. This can be a number in the range 0 through 127. The larger the number the higher the priority. The default priority is 64. |
decnet [network-number] routing [iv-prime] decnet-address
no decnet routing
To enable DECnet routing, use the decnet routing global configuration command. To disable DECnet routing, use the no form of this command.
| network-number | (Optional) Network number in the range 0 through 3. Specified when using Address Translation Gateway (ATG). If not specified, the default is network 0. |
| iv-prime | (Optional) Enables DECnet Phase IV Prime routing. |
| decnet-address | Address in DECnet format X.Y, where X is the area number and Y is the node number. |
decnet routing-timer seconds
no decnet routing-timer
To specify how often the router sends routing updates that list the hosts that the router can reach, use the decnet routing-timer interface configuration command. Use the no form of this command to disable the routing update timer.
| seconds | Time, in seconds, from 1 through 65535. The default is 40 seconds. |
ping
Use the DECnet ping privileged EXEC command to send DECnet echo packets to test the reachability of a remote host over a DECnet network.
ping decnet {host | address}
Use the ping decnet user EXEC command to send DECnet echo packets to test the reachability of a remote host over a DECnet network.
| host | DECnet host of system to ping |
| address | DECnet address of system to ping |
show decnet
Use the show decnet privileged EXEC command to display the global DECnet parameters.
show decnet interface [type number]
Use the show decnet interface EXEC command to display the global DECnet status and configuration for all interfaces, or the status and configuration for a specified interface.
| type | (Optional) Interface type |
| number | (Optional) Interface unit number |
show decnet map
Use the show decnet map EXEC command to display the address mapping information used by the DECnet Address Translation Gateway.
show decnet neighbors
Use the show decnet neighbors privileged EXEC command to display all Phase IV and Phase IV Prime adjacencies and the MAC address associated with each neighbor.
show decnet route [decnet-address]
Use the show decnet route EXEC command to display the DECnet routing table.
| decnet-address | (Optional) DECnet address and, when specified, the first hop route to that address is displayed. |
show decnet traffic
The show decnet traffic EXEC command shows the DECnet traffic statistics, including datagrams sent, received, and forwarded.
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