Troubleshooting Pim - HP A8800 Configuration Manual

(Router A and Router D) have generated (S, G) entry, while Router E, which is not on the SPT path, does
not have multicast routing entries. You can use the display pim routing-table command to view the PIM
routing table information on each router. For example:
# Display the PIM routing table information on Router A.
[RouterA] display pim routing-table
VPN-Instance: public net
Total 0 (*, G) entry; 1 (S, G) entry
(10.110.5.100, 232.1.1.1)
Protocol: pim-ssm, Flag:
UpTime: 00:13:25
Upstream interface: Serial4/1/9/1:0
Upstream neighbor: 192.168.1.2
RPF prime neighbor: 192.168.1.2
Downstream interface(s) information:
Total number of downstreams: 1
1: GigabitEthernet3/1/1
# Display the PIM routing table information on Router D.
[RouterD] display pim routing-table
VPN-Instance: public net
Total 0 (*, G) entry; 1 (S, G) entry
(10.110.5.100, 232.1.1.1)
Protocol: pim-ssm, Flag: LOC
UpTime: 00:12:05
Upstream interface: GigabitEthernet3/1/1
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Serial4/1/9/1:0

Troubleshooting PIM

A multicast distribution tree cannot be built correctly
Symptom
None of the routers in the network (including routers directly connected with multicast sources and
receivers) have multicast forwarding entries. That is, a multicast distribution tree cannot be built correctly
and clients cannot receive multicast data.
Analysis
When PIM-DM runs on the entire network, multicast data is flooded from the first hop router
•
connected with the multicast source to the last-hop router connected with the clients. When the
Protocol: igmp, UpTime: 00:13:25, Expires: 00:03:25
Protocol: pim-ssm, UpTime: 00:12:05, Expires: 00:03:25
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