HP VPN Firewall Appliances Network Management Configuration Guide

573
1: GigabitEthernet0/1
Protocol: igmp, UpTime: 00:04:25, Expires: never
(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: GigabitEthernet0/1
Protocol: pim-dm, UpTime: 00:04:25, Expires: never
The output shows that Router A is the RPF neighbor of the firewall and the multicast data from
Router A is delivered over a GRE tunnel to the firewall.
Troubleshooting multicast routing and forwarding
This section describes common multicast routing and forwarding problems and how to troubleshoot
them.
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 the static multicast route is not configured or updated correctly to match the current network
conditions, the route entry and the configuration information of static multicast route do not exist in
the multicast routing table.
• If a better route is found, the static multicast route might also fail.
Solution
1. Use the display multicast routing-table static command to view the information of static multicast
routes to verify that the static multicast route has been correctly configured and that the route entry
exists in the multicast routing table.
2. Check the type of the next-hop interface of the static multicast route. If the interface is not a
point-to-point interface, be sure to specify the next hop address for the outgoing interface when
you configure the static multicast route.
3. Check that the static multicast route matches the specified routing protocol. If a protocol was
specified in static multicast route configuration, use the display ip routing-table command to verify
that an identical route was added by the protocol.
4. Check that the static multicast route matches the specified routing policy. If a routing policy was
specified when the static multicast route was configured, use the display route-policy command to
check the configured routing policy.