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This chapter describes the function and displays the syntax for IP multicast routing commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Network Protocols Command Reference, Part 1.
To clear all group entries from the Catalyst switches' caches, use the clear ip cgmp EXEC command.
clear ip cgmp [type number]| type number | (Optional) Interface type and number. |
To delete routes from the DVMRP routing table, use the clear ip dvmrp route EXEC command.
clear ip dvmrp route {* | route}| * | Clears all routes from the DVMRP table. |
| route | Clears the longest matched route. Can be an IP address, a network number, or an IP DNS name. |
To delete entries from the IGMP cache, use the clear ip igmp group EXEC command.
clear ip igmp group [group-name | group-address | type number]| 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 number | (Optional) Interface type and number. |
To delete entries from the IP multicast routing table, use the clear ip mroute EXEC command.
clear ip mroute {* | group [source]}| * | Deletes all entries from the IP multicast routing table. |
| group | Can be either one of the following:
· Name of the multicast group, as defined in the DNS hosts table or with the ip host command. · IP address of the multicast group. This is a multicast IP address in four-part, dotted notation. |
| source | (Optional) If you specify a group name or address, you can also specify a name or address of a multicast source that is transmitting to the group. A source does not need to be a member of the group. |
To delete entries from the Auto-RP cache, use the clear pim auto-rp EXEC command.
clear ip pim auto-rp rp-address| rp-address | Clears only the entries related to the RP at this address. If this argument is omitted, the entire Auto-RP cache is cleared. |
To clear RTP header compression structures and statistics, use the clear ip rtp header-compression EXEC command.
clear ip rtp header-compression [type number]| type number | (Optional) Interface type and number. |
To delete a Session Directory Protocol (sdr) cache entry or the entire sdr cache, use the clear ip sdr EXEC command.
clear ip sdr [group-address | "session-name"]| group-address | (Optional) Deletes all sessions associated with the IP group address. |
| "session-name" | (Optional) Deletes only the sdr cache entry with the specified name. |
To enable RTP header compression for all Frame Relay maps on a physical interface, use the frame-relay ip rtp header-compression interface configuration command. To disable the feature, use the no form of this command.
frame-relay ip rtp header-compression [active | passive]| active | (Optional) Compresses all outgoing RTP packets. This is the default. |
| passive | (Optional) Compresses the outgoing RTP/UDP/IP header only if an incoming packet had a compressed header. |
To enable both RTP and TCP header compression on a link, use the frame-relay map ip compress interface configuration command. To disable both RTP and TCP header compression, use the no form of this command.
frame-relay map ip ip-address dlci [broadcast] compress| ip-address | IP address of the destination or next hop. |
| dlci | DLCI number. |
| broadcast | (Optional) Forwards broadcasts to the specified IP address. |
To enable RTP header compression per DLCI, use the frame-relay map ip rtp header-compression interface configuration command. To disable the feature, use the no form of this command.
frame-relay map ip ip-address dlci rtp header-compression [active | passive]| ip-address | IP address of the destination or next hop. |
| dlci | DLCI number. |
| active | (Optional) All outgoing RTP packets are compressed. This is the default. |
| passive | (Optional) Compresses the outgoing RTP/UDP/IP header only if an incoming packet had a compressed header. |
To enable CGMP on an interface of a router connected to a Catalyst 5000 switch, use the ip cgmp interface configuration command. To disable CGMP routing, use the no form of this command.
ip cgmp [proxy]| proxy | (Optional) Enables CGMP and the CGMP proxy function. |
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.
ip dvmrp accept-filter access-list-number [distance] neighbor-list access-list-number| 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. |
| neighbor-list access-list number | Number of a neighbor list. DVMRP reports are accepted only by those neighbors on the list. |
To enable DVMRP auto-summarization if it was disabled, use the ip dvmrp auto-summary interface configuration command. To disable the feature, use the no form of this command.
ip dvmrp auto-summaryTo 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.
ip dvmrp default-information {originate | only}| 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. |
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.
ip dvmrp metric metric [list access-list-number] [[protocol process-id] | dvmrp]| 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). |
| list access-list-number | (Optional) Number of an access list. If you specify this argument, only the multicast 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, such as bgp, eigrp, igrp, isis, ospf, rip, or static or dvmrp.
If you specify these arguments, only routes learned by the specified routing protocol are advertised in DVMRP report messages. |
| process-id | (Optional) Process ID number of the unicast routing protocol. |
| dvmrp | (Optional) Allows routes from the DVMRP routing table to be advertised with the configured metric or filtered. |
| route-map map-name | Unicast routes are subject to route-map conditions before being injected into DVMRP. Route-maps cannot be used for DVMRP routes. |
To change the metrics of advertised DVMRP routes and thus favor or not favor a certain route, use the ip dvmrp metric-offset interface configuration command. To restore the default values, use the no form of this command.
ip dvmrp metric-offset [in | out] increment| in | (Optional) The increment value is added to incoming DVMRP reports and is reported in mrinfo replies. The default for in is 1. |
| out | (Optional) The increment value is added to outgoing DVMRP reports for routes from the DVMRP routing table. The default for out is 0. |
| increment | Value added to the metric of a DVMRP route advertised in a Report message. |
To configure an interpacket delay of a DVMRP report, use the ip dvmrp output-report-delay interface configuration command. To restore the default values, use the no form of this command.
ip dvmrp output-report-delay milliseconds [burst]| milliseconds | Number of milliseconds that elapse between transmissions of a set of DVMRP report packets. The number of packets in the set is determined by the burst argument. The default number of milliseconds is 100 milliseconds. |
| burst | (Optional) The number of packets in the set being transmitted. The default is 2 packets. |
To configure the router so that it will not peer with a DVMRP neighbor if that neighbor does not support DVMRP pruning or grafting, use the ip dvmrp reject-non-pruners interface configuration command. To disable the feature, use the no form of this command.
ip dvmrp reject-non-prunersTo change the number of DVMRP routes allowed before a syslog warning message is issued, use the ip dvmrp routehog-notification global configuration command. To restore the default value, use the no form of this command.
ip dvmrp routehog-notification route-count| route-count | Number of routes allowed before a syslog message is triggered. The default is 10,000 routes. |
To change the limit on the number of DVMRP routes that can be advertised over an interface enabled to run DVMRP, use the ip dvmrp route-limit global configuration command. To configure no limit, use the no form of this command.
ip dvmrp route-limit count| count | Number of DVMRP routes that can be advertised. The default is 7000 routes. |
To configure a DVMRP summary address to be advertised out the interface, use the ip dvmrp summary-address interface configuration command. To remove the summary address, use the no form of this command.
ip dvmrp summary-address address mask [metric value]| address | Summary IP address that is advertised instead of the more specific route. |
| mask | Mask on the summary IP address. |
| metric value | (Optional) Metric that is advertised with the summary address. The default is 1. |
To enable DVMRP unicast routing on an interface, use the ip dvmrp unicast-routing interface configuration command. To disable the feature, use the no form of this command.
ip dvmrp unicast-routingTo control the multicast groups that hosts on the subnet serviced by 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.
ip igmp access-group access-list-number version| access-list-number | Number of a standard IP access list. This can be a number from 1 to 99. |
| version | Changes IGMP version. Default is version 2. |
To cause the system to forward all IGMP Host Reports and Leave messages received on the interface to the specified IP address, use the ip igmp helper-address interface configuration command. To disable such forwarding, use the no form of this command.
ip igmp helper-address ip-address| ip-address | IP address to which IGMP Host Reports and Leave messages are forwarded. Specify the IP address of an interface on the central router. |
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.
ip igmp join-group group-address| group-address | Address of the multicast group. This is a multicast IP address in four-part, dotted notation. |
To configure the frequency at which the Cisco IOS software 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.
ip igmp query-interval seconds| 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 configure the maximum response time advertised in IGMP queries, use the ip igmp query-max-response-time interface configuration command. To restore the default value, use the no form of this command.
ip igmp query-max-response-time seconds| seconds | Maximum response time, in seconds, advertised in IGMP queries. The default value is 10 seconds. |
To configure the timeout time before the router takes over as the querier for the interface, after the previous querier has stopped querying, use the ip igmp query-timeout interface configuration command. To restore the default value, use the no form of this command.
ip igmp query-timeout seconds| seconds | Number of seconds that the router waits after the previous querier has stopped querying and before it takes over as the querier. |
To configure the router to be a statically connected member of the specified group on the interface, use the ip igmp static-group interface configuration command. To remove the router as a member of the group, use the no form of this command.
ip igmp static-group group-address| group-address | IP multicast group address of a group that the router is a member of. |
To configure which version of IGMP the router uses, use the ip igmp version interface configuration command. To restore the default value, use the no form of this command.
ip igmp version {2 | 1}| 2 | IGMP Version 2. |
| 1 | IGMP Version 1. |
To configure a multicast static route (mroute), use the ip mroute global configuration command. To remove the route, use the no form of this command.
ip mroute source mask [protocol as-number] {rpf-address | type number} [distance]| source | IP address of the multicast source. |
| mask | Mask on the IP address of the multicast source. |
| protocol | (Optional) Unicast routing protocol that you are using. |
| as-number | (Optional) Autonomous system number of the routing protocol you are using, if applicable. |
| rpf-address | Incoming interface for the mroute. If the Reverse Path Forwarding address rpf-address is a PIM neighbor, PIM Joins, Grafts, and Prunes are sent to it. The rpf-address can be a host IP address of a directly connected system or a network/subnet number. When it is a route, a recursive lookup is done from the unicast routing table to find a directly connected system. If rpf-address is not specified, the interface type number is used as the incoming interface. |
| type number | Interface type and number for the mroute. |
| distance | (Optional) Determines whether a unicast route, a DVMRP route, or a static mroute should be used for the RPF lookup. The lower distances have better preference. If the static mroute has the same distance as the other two RPF sources, the static mroute will take precedence. The default is 0. |
To configure IP multicast fast switching, use the ip mroute-cache interface configuration command. To disable IP multicast fast switching, use the no form of this command.
ip mroute-cacheTo configure an administratively scoped boundary, use the ip multicast boundary interface configuration command. To remove the boundary, use the no form of this command.
ip multicast boundary access-list-number| access-list-number | Standard IP access list number identifying an access list that controls the range of group addresses affected by the boundary. |
To allocate a circular buffer to store IP multicast packet headers that the router receives, use the ip multicast cache-headers global configuration command. To disable the feature, use the no form of this command.
ip multicast cache-headersTo allow IP multicast routing in a multicast-capable internetwork between two broadcast-only internetworks, use the ip multicast helper-map interface configuration command. To prevent this feature, use the no form of this command.
ip multicast helper-map {group-address | broadcast} {broadcast-address || group-address | Multicast group address of traffic to be converted to broadcast traffic. Use this with the broadcast-address. |
| broadcast | Specifies the traffic is being converted from broadcast to multicast. Use this with the multicast-address. |
| broadcast-address | Address to which broadcast traffic is sent. Use this with the group-address. |
| multicast-address | Specifies the IP multicast address to which the converted traffic is directed. Use this with the broadcast keyword. |
| extended-access-list-number | IP extended access list that controls which broadcast packets are translated, based on the UDP port number. |
To control the rate a sender from the source-list can send to a multicast group in the group-list, use the ip multicast rate-limit interface configuration command. To remove the control, use the no form of this command.
ip multicast rate-limit {in | out} [video | whiteboard] [group-list access-list] [source-list| in | Only packets at the rate of kbps or slower are accepted on the interface. |
| out | Only a maximum of kbps will be transmitted on the interface. |
| video | (Optional) Rate limiting is performed based on the UDP port number used by video traffic. Video traffic is identified by consulting the sdr cache. |
| whiteboard | (Optional) Rate limiting is performed based on the UDP port number used by whiteboard traffic. Whiteboard traffic is identified by consulting the sdr cache. |
| group-list access-list | (Optional) Specifies the access list number that controls which multicast groups are subject to the rate limit. |
| source-list access-list | (Optional) Specifies the access list number that controls which senders are subject to the rate limit. |
| kbps | Kilobits-per-second transmission rate. Any packets sent at greater than this value are silently discarded. If this command is configured, the default value is 0, meaning that no traffic is permitted. Therefore, set this to a positive value if you use this command. |
To enable IP multicast routing, use the ip multicast-routing global configuration command. To disable IP multicast routing, use the no form of this command.
ip multicast-routingTo configure the time-to-live (TTL) threshold of packets being forwarded out an interface, use the ip multicast ttl-threshold interface configuration command. To return to the default TTL threshold, use the no form of this command.
ip multicast ttl-threshold ttl-value| ttl-value | 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. |
To enable the mapping of IP multicast addresses to the Token Ring functional address 0xc000.0004.0000, use the ip multicast use-functional interface configuration command. To disable the feature, use the no form of this command.
ip multicast use-functionalTo enable PIM on an interface, use the ip pim interface configuration command. To disable PIM on the interface, use the no form of this command.
ip pim {dense-mode | sparse-mode | sparse-dense-mode}| dense-mode | Enables dense mode of operation. |
| sparse-mode | Enables sparse mode of operation. |
| sparse-dense-mode | The interface is treated in the mode in which the group operates. |
To configure a router to accept Joins or Prunes destined for a specified RP and for a specific list of groups, use the ip pim accept-rp global configuration command. To remove that check, use the no form of this command.
ip pim accept-rp {address | auto-rp} [group-access-list-number]| address | RP address of the RP allowed to send Join messages to groups in the range specified by the group access list. |
| auto-rp | Join and Register messages are accepted only for RPs that are in the Auto-RP cache. |
| group-access-list-number | (Optional) Access list that defines which groups are subject to the check. |
To configure the frequency at which a sparse-mode PIM router sends periodic sparse-mode Join/Prune PIM messages, use the ip pim message-interval global configuration command. To return to the default interval, use the no form of this command.
ip pim message-interval seconds| seconds | Interval, in seconds, at which periodic sparse-mode Join and Prune PIM messages are sent. It can be a number from 1 to 65535. The default is 60 seconds. |
To configure the minimum traffic rate to keep virtual circuits from being idled, use the ip pim minimum-vc-rate interface configuration command. To restore the default value, use the no form of this command.
ip pim minimum-vc-rate pps| pps | Rate, in packets per second, below which a VC is eligible for idling. The default value is 0, which means all VCs are eligible for idling. The range is from 0 to 4294967295. |
To enable PIM to open ATM multipoint switched virtual circuits for each multicast group that a receiver joins, use the ip pim multipoint-signalling interface configuration command. To disable the feature, use the no form of this command.
ip pim multipoint-signallingTo configure a multiaccess WAN interface to be in nonbroadcast, multiaccess mode, use the ip pim nbma-mode interface configuration command. To disable this feature, use the no form of this command.
ip pim nbma-modeTo prevent a router from participating in PIM (for example, to configure stub multicast routing), use the ip pim neighbor-filter interface configuration command. To remove the restriction, use the no form of this command.
ip pim neighbor-filter access-list-number| access-list-number | Standard IP access list that denies PIM packets from a source. |
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.
ip pim query-interval seconds| 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. |
To configure the address of a PIM rendezvous point (RP) for a particular group, use the ip pim rp-address global configuration command. To remove an RP address, use the no form of this command.
ip pim rp-address ip-address [group-access-list-number] [override]| ip-address | IP address of a router to be a PIM RP. This is a unicast IP address in four-part, dotted notation. |
| group-access-list-number | (Optional) Number of an access list that defines for which multicast groups the RP should be used. This is a standard IP access list. The number can be from 1 to 100. |
| override | (Optional) Indicates that if there is a conflict between the RP configured with this command and one learned by Auto-RP, the RP configured with this command prevails. |
To filter incoming Auto-RP announcement messages coming from the RP, use the ip pim rp-announce-filter global configuration command. To remove the filter, use the no form of this command.
ip pim rp-announce-filter rp-list access-list-number group-list access-list-number| rp-list access-list-number | Standard access list of RP addresses that are allowable for the group ranges supplied in the group-list access-list-number. |
| group-list access-list-number | Standard access list that describes the multicast groups the RPs serve. |
To use Auto-RP to configure which groups the router is willing to act as RP for, use the ip pim send-rp-announce global configuration command. To deconfigure this router to be the RP, use the no form of this command.
ip pim send-rp-announce type number scope ttl group-list access-list-number| type number | Interface type and number that identify the RP address. |
| scope ttl | Time-to-live value that limits the announcements. |
| group-list access-list-number | Access list that describes the group ranges for which this router is the RP. |
To configure the router to be an RP-mapping agent, use the ip pim send-rp-discovery global configuration command. To restore the default value, use the no form of this command.
ip pim send-rp-discovery scope ttl| scope ttl | Time-to-live value in the IP header that keeps the discovery messages within this number of hops. |
To configure when a PIM leaf router should join the shortest path source-tree for the specified group, use the ip pim spt-threshold global configuration command. To restore the default value, use the no form of this command.
ip pim spt-threshold {kbps | infinity} [group-list access-list-number]| kbps | Traffic rate in kilobits per second. |
| infinity | Causes all sources for the specified group to use the shared-tree. |
| group-list access-list-number | (Optional) Indicates what groups the threshold applies to. Must be a standard IP access list number. If the value is 0 or is omitted, the threshold applies to all groups. |
To change the maximum number of virtual circuits that PIM can open, use the ip pim vc-count interface configuration command. To restore the default value, use the no form of this command.
ip pim vc-count number| number | Maximum number of virtual circuits that PIM can open. The default is 200 virtual circuits. The range is from 1 to 65535. |
To specify the total number of RTP header compression connections that can exist on an interface, use the ip rtp compression-connections interface configuration command. To restore the default value, use the no form of this command.
ip rtp compression-connections number| number | Number of connections the cache supports, in the range from 3 to 256. The default is 16 connections. |
To enable RTP header compression, use the ip rtp header-compression interface configuration command. To disable RTP header compression, use the no form of this command.
ip rtp header-compression [passive]| passive | (Optional) Compresses outgoing RTP packets only if incoming RTP packets on the same interface are compressed. |
To limit how long an sdr cache entry stays active in the cache, use the ip sdr cache-timeout global configuration command. To restore the default value, use the no form of this command.
ip sdr cache-timeout minutes| minutes | Time, in minutes, that an sdr cache entry is active in the cache. |
To enable the Cisco IOS software to listen to session directory advertisements, use the ip sdr listen interface configuration command. To disable the feature, use the no form of this command.
ip sdr listenTo query what neighboring multicast routers are peering with the local router, use the mrinfo EXEC command.
mrinfo [hostname-or-address] [source-address-or-interface]| hostname-or-address | (Optional) Queries the DNS name or IP address of the multicast router. If omitted, the router queries itself. |
| source-address-or-interface | (Optional) Source address used on mrinfo requests. If omitted, the source address is based on the outbound interface for the destination. |
To display IP multicast packet rate and loss information, use the mstat user EXEC command.
mstat source [destination] [group]| source | DNS name or the IP address of the multicast-capable source. |
| destination | (Optional) DNS name or address of the destination. If omitted, the command uses the system at which the command is typed. |
| group | (Optional) DNS name or multicast address of the group to be displayed. Default address is 224.2.0.1 (the group used for MBONE Audio). |
To trace the path from a source to a destination branch for a multicast distribution tree, use the mtrace user EXEC command.
mtrace source [destination] [group]| source | DNS name or the IP address of the multicast-capable source. This is a unicast address of the beginning of the path to be traced. |
| destination | (Optional) DNS name or address of the unicast destination. If omitted, the mtrace starts from the system at which the command is typed. |
| group | (Optional) DNS name or multicast address of the group to be traced. Default address is 224.2.0.1 (the group used for MBONE Audio). When address 0.0.0.0 is used, the software invokes a weak mtrace. A weak mtrace is one that follows the RPF path to the source, regardless of whether any router along the path has multicast routing table state. |
To send an ICMP Echo Request to a multicast group, use the ping EXEC command.
ping [group-name-or-address]| group-name-or-address | (Optional) Sends an ICMP Echo Request to the specified multicast group. |
To show Frame Relay's RTP header compression statistics, use the show frame-relay ip rtp header-compression EXEC command.
show frame-relay ip rtp header-compression [interface type number]| interface type number | (Optional) Interface type and number. |
To display the contents of the DVMRP routing table, use the show ip dvmrp route EXEC command.
show ip dvmrp route [name | ip-address]| name | ip-address | (Optional) Name or IP address of an entry in the DVMRP routing table. |
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.
show ip igmp groups [group-name | group-address | type number]| 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. |
To display multicast-related information about an interface, use the show ip igmp interface EXEC command.
show ip igmp interface [type number]| type | (Optional) Interface type. |
| number | (Optional) Interface number. |
To display the contents of the IP fast-switching cache, use the show ip mcache EXEC command.
show ip mcache [group [source]]| group | (Optional) Displays the fast-switching cache for the single group. The group argument can be either a Class D IP address or a DNS name. |
| source | (Optional) If source is also specified, displays a single multicast cache entry. The source argument can be either a unicast IP address or a DNS name. |
To display the contents of the circular cache-header buffer, use the show ip mpacket EXEC command.
show ip mpacket [source-address-or-name] [group-address-or-name] [detail]| source-address-or-name | (Optional) Displays cache headers matching the specified source address or name. |
| group-address-or-name | (Optional) Displays cache headers matching the specified group address or group name. |
| detail | (Optional) In addition to the summary information, displays the rest of the IP header fields on an additional line, plus the first 8 bytes after the IP header (usually the UDP port numbers). |
To display the contents of the IP multicast routing table, use the show ip mroute EXEC command.
show ip mroute [group-name | group-address] [source] [summary] [count] [active kbps]
| group-name | group-address | (Optional) IP address, name, or interface of the multicast group as defined in the DNS hosts table. |
| source | (Optional) IP address or name of a multicast source. |
| summary | (Optional) Displays a one-line, abbreviated summary of each entry in the IP multicast routing table. |
| count | (Optional) Displays statistics about the group and source, including number of packets, packets per second, average packet size, and bits per second. |
| active kbps | (Optional) Displays the rate that active sources are sending to multicast groups. Active sources are those sending at a rate of kbps or higher. The kbps argument defaults to 4 kbps. |
To display information about interfaces configured for PIM, use the show ip pim interface EXEC command.
show ip pim interface [type number] [count]| type | (Optional) Interface type. |
| number | (Optional) Interface number. |
| count | (Optional) Number of packets received and sent out the interface. |
To list the PIM neighbors discovered by the Cisco IOS software, use the show ip pim neighbor EXEC command.
show ip pim neighbor [type number]| type | (Optional) Interface type. |
| number | (Optional) Interface number. |
To display active rendezvous points (RPs) that are cached with associated multicast routing entries, use the show ip pim rp EXEC command.
show ip pim rp [group-name | group-address] [mapping]| group-name | (Optional) Name of the group about which to display RPs. |
| group-address | (Optional) Address of the group about which to display RPs. |
| mapping | (Optional) Displays all group-to-RP mappings that the router is aware of (either configured or learned from Auto-RP). |
To display ATM virtual circuit status information for multipoint VCs opened by PIM, use the show ip pim vc EXEC command.
show ip pim vc [group-or-name] [type number]| group-or-name | (Optional) IP multicast group or name. Displays only the single group. |
| type number | (Optional) Interface type and number. Displays only the single ATM interface. |
To display how IP multicast routing does Reverse-Path Forwarding (RPF), use the show ip rpf EXEC command.
show ip rpf source-address-or-name| source-address-or-name | Source name or address of the host for which the RPF information is displayed. |
To show RTP header compression statistics, use the show ip rtp header-compression EXEC command.
show ip rtp header-compression [type number] [detail]| type number | (Optional) Interface type and number. |
| detail | (Optional) Displays details of each connection. |
To display the session directory cache, use the show ip sdr EXEC command.
show ip sdr [group | "session-name" | detail]| group | (Optional) Displays the sessions defining the multicast group in detail format. |
| "session-name" | (Optional) Displays the single session in detail format. The session name is enclosed in quotation marks (" "). |
| detail | (Optional) Displays all sessions in detail format. |
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