Troubleshooting Multicast Routing And Forwarding; Static Multicast Route Failure - HP 5920 series Configuration Manual

[SwitchC] display pim routing-table
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
Protocol: pim-dm, Flag: WC
UpTime: 00:04:25
Upstream interface: NULL
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface200
(10.1.1.100, 225.1.1.1)
Protocol: pim-dm, Flag: ACT
UpTime: 00:06:14
Upstream interface: Tunnel0
Upstream neighbor: 50.1.1.1
RPF prime neighbor: 50.1.1.1
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface200
The output shows that Switch A is the RPF neighbor of Switch C and the multicast data from Switch A is
delivered over a GRE tunnel to Switch C.

Troubleshooting multicast routing and forwarding

Static multicast route failure

Symptom
No dynamic routing protocol is enabled on the routers, and the physical status and link layer status of
interfaces are both up, but the static multicast route fails.
Analysis
• If a static multicast route is not correctly configured or updated to match the current network
conditions, it does not exist in the static multicast routing table.
If a better route is found, the static multicast route might also fail.
•
Solution
Use the display multicast routing-table static command to display information about static
1.
multicast routes to verify that the static multicast route has been correctly configured and the route
entry exists in the static multicast routing table.
Check the type of the interface that connects the static multicast route to the RPF neighbor. If the
2.
interface is not a point-to-point interface, be sure to specify the address for the RPF neighbor.
Protocol: igmp, UpTime: 00:04:25, Expires: never
Protocol: pim-dm, UpTime: 00:04:25, Expires: never
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