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This chapter explains the function and syntax of the IP multicast routing commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Cisco IOS IP and IP Routing Command Reference, Release 12.1.
To clear all group entries from the caches of Catalyst switches, use the clear ip cgmp EXEC command.
clear ip cgmp [type number]
Syntax Description
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}
Syntax Description
* 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 Internet Group Management Protocol (IGMP) cache, use the clear ip igmp group EXEC command.
clear ip igmp group [group-name | group-address | type number]
Syntax Description
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]}
Syntax Description
* Deletes all entries from the IP multicast routing table. group Can be either one of the following: 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
Syntax Description
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 Real-Time Transport Protocol (RTP) header compression structures and statistics, use the clear ip rtp header-compression EXEC command.
clear ip rtp header-compression [type number]
Syntax Description
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"]
Syntax Description
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 Real-Time Transport Protocol (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 compression, use the no form of this command.
frame-relay ip rtp header-compression [active | passive]
Syntax Description
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 Real-Time Transport Protocol (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
Syntax Description
ip-address IP address of the destination or next hop. dlci DLCI number. broadcast (Optional) Forwards broadcasts to the specified IP address.
To enable Real-Time Transport Protocol (RTP) header compression per data-link connection identifier (DLCI), use the frame-relay map ip rtp header-compression interface configuration command. To disable the compression, use the no form of this command.
frame-relay map ip ip-address dlci rtp header-compression [active | passive]
Syntax Description
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 Cisco Group Management Protocol (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]
Syntax Description
proxy (Optional) Enables CGMP and the CGMP proxy function.
To configure an acceptance filter for incoming Distance Vector Multicast Routing Protocol (DVMRP) reports, use the ip dvmrp accept-filter interface configuration command. To disable this filter, use the no form of this command.
ip dvmrp accept-filter access-list-number [distance] neighbor-list access-list-number
Syntax Description
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 Number of a neighbor list. DVMRP reports are accepted only by those neighbors on the list.
access-list number
To enable Distance Vector Multicast Routing Protocol (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-summarySyntax Description
This command has no arguments or keywords.
To advertise network 0.0.0.0 to Distance Vector Multicast Routing Protocol (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}
Syntax Description
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 Distance Vector Multicast Routing Protocol (DVMRP) reports, use the appropriate form of the ip dvmrp metric interface configuration command. To disable this function, use the appropriate no form of this command.
ip dvmrp metric metric [list access-list-number] [[protocol process-id] | dvmrp]
Syntax Description
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 Distance Vector Multicast Routing Protocol (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
Syntax Description
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 Distance Vector Multicast Routing Protocol (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]
Syntax Description
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 Distance Vector Multicast Routing Protocol (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 function, use the no form of this command.
ip dvmrp reject-non-prunersSyntax Description
This command has no arguments or keywords.
To change the number of Distance Vector Multicast Routing Protocol (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
Syntax Description
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 Distance Vector Multicast Routing Protocol (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
Syntax Description
count Number of DVMRP routes that can be advertised. The default is 7000 routes.
Syntax Description
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 Distance Vector Multicast Routing Protocol (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-routingSyntax Description
This command has no arguments or keywords.
To 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
Syntax Description
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 Internet Group Management Protocol (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
Syntax Description
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
Syntax Description
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 Internet Group Management Protocol (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
Syntax Description
seconds Frequency, in seconds, at which to send IGMP host-query messages. It can be a number from 0 to 65535. The default is 60 seconds.
To configure the maximum response time advertised in Internet Group Management Protocol (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
Syntax Description
seconds Maximum response time, in seconds, advertised in IGMP queries. The default value is 10 seconds.
Syntax Description
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
Syntax Description
group-address IP multicast group address of a group of which the router is a member.
To configure which version of Internet Group Management Protocol (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}
Syntax Description
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]
Syntax Description
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 Protocol Independent Multicast (PIM) neighbor, PIM Joins, Grafts, and Prunes are sent to it. The rpf-address argument 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 the rpf-address argument 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 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
Syntax Description
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 remove the buffer, use the no form of this command.
ip multicast cache-headersSyntax Description
This command has no arguments or keywords.
To allow IP multicast routing in a multicast-capable internetwork between two broadcast-only internetworks, use the ip multicast helper-map interface configuration command. To disable this function, use the no form of this command.
ip multicast helper-map {group-address | broadcast} {broadcast-address | multicast-address} extended-access-list-number
Syntax Description
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 access-list] kbps
Syntax Description
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 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
Syntax Description
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 function, use the no form of this command.
ip multicast use-functionalSyntax Description
This command has no arguments or keywords.
To enable Protocol Independent Multicast (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}
Syntax Description
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 rendezvous point (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]
Syntax Description
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 interface to be the Protocol Independent Multicast (PIM) domain border, use the ip pim border interface configuration command. To remove the border, use the no form of this command.
ip pim borderSyntax Description
This command has no arguments or keywords.
To configure the router to announce its candidacy as a bootstrap router (BSR), use the ip pim bsr-candidate global configuration command. To remove this router as a candidate for being a bootstrap router, use the no form of this command.
ip pim bsr-candidate type number hash-mask-length [priority]
Syntax Description
type number Interface type and number on this router from which the bootstrap router address is derived, to make it a candidate. This interface must be enabled with PIM. hash-mask-length Length of a mask (32 bits maximum) that is to be "ANDed" with the group address before the hash function is called. All groups with the same seed hash (correspond) to the same RP. For example, if this value is 24, only the first 24 bits of the group addresses matter. This fact allows you to get one RP for multiple groups. priority (Optional) Integer from 0 to 255. The bootstrap router with the larger priority is preferred. If the priority values are the same, the router with the larger IP address is the bootstrap router. The default value is 0.
To configure the frequency at which a sparse-mode Protocol Independent Multicast (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
Syntax Description
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
Syntax Description
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 Protocol Independent Multicast (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-signallingSyntax Description
This command has no arguments or keywords.
To configure a multiaccess WAN interface to be in nonbroadcast multiaccess mode, use the ip pim nbma-mode interface configuration command. To disable this function, use the no form of this command.
ip pim nbma-modeSyntax Description
This command has no arguments or keywords.
To prevent a router from participating in Protocol Independent Multicast (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
Syntax Description
access-list-number Standard IP access list that denies PIM packets from a source.
To configure the frequency of Protocol Independent Multicast (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
Syntax Description
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 Protocol Independent Multicast (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]
Syntax Description
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.
Syntax Description
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 configure the router to advertise itself as a Protocol Independent Multicast (PIM) Version 2 candidate rendezvous point (RP) to the bootstrap router, use the ip pim rp-candidate global configuration command. To remove this router as a candidate for being an RP, use the no form of this command.
ip pim rp-candidate type number [group-list access-list-number]
Syntax Description
type number IP address associated with this interface type and number on this router is advertised as a candidate RP address. group-list access-list-number (Optional) Standard IP access list number that defines the group prefixes that are advertised in association with the RP address.
Syntax Description
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 rendezvous point (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
Syntax Description
scope ttl Time-to-live value in the IP header that keeps the discovery messages within this number of hops.
To configure when a Protocol Independent Multicast (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]
Syntax Description
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 Protocol Independent Multicast (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
Syntax Description
number Maximum number of virtual circuits that PIM can open. The default is 200 virtual circuits. The range is from 1 to 65535.
To configure the Protocol Independent Multicast (PIM) version of the interface, use the ip pim version interface configuration command. To restore the default value, use the no form of this command.
ip pim version [1 | 2]
Syntax Description
1 (Optional) Configures PIM Version 1. 2 (Optional) Configures PIM Version 2.
To specify the total number of Real-Time Transport Protocol (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
Syntax Description
number Number of RTP header compression connections the cache supports, in the range from 3 to 1000. The default is 32 connections (16 calls).
To enable Real-Time Transport Protocol (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]
Syntax Description
passive (Optional) Compresses outgoing RTP packets only if incoming RTP packets on the same interface are compressed.
To limit how long a Session Directory Protocol (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
Syntax Description
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 function, use the no form of this command.
ip sdr listenSyntax Description
This command has no arguments or keywords.
To show Frame Relay Real-Time Transport Protocol (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]
Syntax Description
interface type number (Optional) Interface type and number.
To display the contents of the Distance Vector Multicast Routing Protocol (DVMRP) routing table, use the show ip dvmrp route EXEC command.
show ip dvmrp route [name | ip-address]
Syntax Description
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 Internet Group Management Protocol (IGMP), use the show ip igmp groups EXEC command.
show ip igmp groups [group-name | group-address | type number]
Syntax Description
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]
Syntax Description
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]]
Syntax Description
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 | name] [group-address | name] [detail]
Syntax Description
source-address | name (Optional) Displays cache headers matching the specified source address or name. group-address | 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]
Syntax Description
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 the bootstrap router (BSR) information, use the show ip pim bsr EXEC command.
show ip pim bsrSyntax Description
This command has no arguments or keywords.
To display information about interfaces configured for Protocol Independent Multicast (PIM), use the show ip pim interface EXEC command.
show ip pim interface [type number] [count]
Syntax Description
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]
Syntax Description
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]
Syntax Description
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 which rendezvous points (RP) is being selected for a specified group, use the show ip pim rp-hash EXEC command.
show ip pim rp-hash group
Syntax Description
group Group for which to display RP information.
Syntax Description
group-address | 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 | name}
Syntax Description
source-address | name Source address or name of the host for which the RPF information is displayed.
To show Real-Time Transport Protocol (RTP) header compression statistics, use the show ip rtp header-compression EXEC command.
show ip rtp header-compression [type number] [detail]
Syntax Description
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]
Syntax Description
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.
Posted: Wed Jul 26 14:45:59 PDT 2000
Copyright 1989-2000©Cisco Systems Inc.