Monitoring PIM Group-to-RP Mappings for IPv4

Purpose

Display information about PIM group-to-RP mappings. Specify the address of a group to view PIM group-to-RP mappings for a particular group. Specify the mapping keyword to display all group-to-RP mappings that the router has recorded.

Action

To display information about PIM group-to-RP mappings:

host1:8#show ip pim rp mapping 
PIM Group-to-RP mapping(s)
Group(s) 224.0.0.0/4
  RP 122.0.0.1,  priority 0,  via  AutoRP, expiryTime 88
Group(s) 224.0.1.39/32 (negative)
  RP 122.0.0.1,  priority 0,  via  AutoRP (Negative), expiryTime 88
Group(s) 224.0.1.40/32 (negative)
  RP 122.0.0.1,  priority 0,  via  AutoRP (Negative), expiryTime 88
host1:8#show ip pim rp mapping 
PIM Group-to-RP mapping(s)
Group(s) 224.0.0.0/4
  RP 134.0.0.1, priority 0, via Static, from access-list 1
Group(s) 232.0.0.0/16
  RP 134.0.0.1, priority 0, via BSR, expires in 121 seconds

Meaning

Table 36 lists the show ip pim rp command output fields.

Table 36: show ip pim rp Output Fields

Field Name

Field Description

Group(s)

Prefix of the multicast group

RP

IP address of RP router for the multicast group

priority

Priority of the router

via

Method by which the RP router was assigned: AutoRP, Static RP, or BSR

expiryTime

Time in seconds at which the RP mapping becomes invalid, unless the mapping agent (access list) reassigns the RP router to this group

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