Troubleshooting Multicast Routing And Forwarding; Multicast Static Route Failure; Multicast Data Fails To Reach Receivers - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
As shown above, the RPF routes to Source 2 exist on Switch B and Switch C. The
source is the configured static route.

7.6 Troubleshooting Multicast Routing and Forwarding

7.6.1 Multicast Static Route Failure

I. Symptom
No dynamic routing protocol is enabled on the routers, and the physic status and link
layer status of interfaces are both up, but the multicast static route fails.
II. Analysis
If the multicast static route is not configured or updated correctly to match the
current network conditions, the route entry does not exist in the multicast route
configuration table and multicast routing table.
If the optimal route is found, the multicast static route may also fail.
III. Solution
1) In the configuration, you can use the display multicast routing-table static
config command to view the detailed configuration information of multicast static
routes to verify that the multicast static route has been correctly configured and the
route entry exists.
2) In the configuration, you can use the display multicast routing-table static
command to view the information of multicast static routes to verify that the
multicast static route has been correctly configured and the route entry exists in
the multicast routing table.
3) Check the next hop interface type of the multicast static route. If the interface is not
a point-to-point interface, be sure to specify the next hop address to configure the
outgoing interface when you configure the multicast static route.
4) Check that the multicast static route matches the specified routing protocol. If a
protocol was specified in multicast static route configuration, enter the display ip
routing-table command to check if an identical route was added by the protocol.
5) Check that the multicast static route matches the specified routing policy. If a
routing policy was specified when the multicast static route was configured, enter
the display route-policy command to check the configured routing policy.

7.6.2 Multicast Data Fails to Reach Receivers

I. Symptom
The multicast data can reach some routers but fails to reach the last hop router.
Chapter 7 Multicast Routing and Forwarding
7-17
Configuration