156
RPF prime neighbor: 192.168.1.2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: igmp, UpTime: 00:13:25, Expires: 00:03:25
# Display the PIM routing table on Switch D.
[SwitchD] display pim routing-table
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: Vlan-interface300
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface105
Protocol: pim-ssm, UpTime: 00:12:05, Expires: 00:03:25
The output shows that switches on the SPT path (Switch A and Switch D) have generated the correct
(S, G) entries.
Troubleshooting PIM
A multicast distribution tree cannot be correctly built
Symptom
No multicast forwarding entries are established on the routers (including routers directly connected
with multicast sources or receivers) in a PIM network. This means that a multicast distribution tree
cannot be built correctly.
Solution
To resolve the problem:
1.
Use
display ip routing-table
to verify that a unicast route to the multicast source or the RP is
available.
2.
Use
display pim interface
to verify PIM information on each interface, especially on the RPF
interface. If PIM is not enabled on the interfaces, use
pim dm
or
pim sm
to enable PIM-DM or
PIM-SM for the interfaces.
3.
Use
display pim neighbor
to verify that the RPF neighbor is a PIM neighbor.
4.
Verify that PIM and IGMP are enabled on the interfaces that directly connect to the multicast
sources or the receivers.
5.
Use
display pim interface verbose
to verify that the same PIM mode is enabled on the RPF
interface on a router and the connected interface of the router's RPF neighbor.
6.
Use
display current-configuration
to verify that the same PIM mode is enabled on all routers.
For PIM-SM, verify that the BSR and C-RPs are correctly configured.
7.
If the problem persists, contact Hewlett Packard Enterprise Support.