Troubleshooting Multicast Routing And Forwarding; Multicast Static Route Failure - HP A5500 SI Switch Series Configuration Manual

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Route selection rule: preference-preferred
Load splitting rule: disable
[SwitchC] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: Vlan-interface101, RPF neighbor: 20.1.1.2
Referenced route/mask: 50.1.1.0/24
Referenced route type: multicast static
Route selection rule: preference-preferred
Load splitting rule: disable
The output shows that the RPF routes to Source 2 exist on Switch B and Switch C. The routes are the
configured static routes.

Troubleshooting multicast routing and forwarding

Multicast static 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 multicast static route fails.
Analysis
If the multicast static route is not configured or updated correctly to match the current network
conditions, the route entry and the configuration information of multicast static route do not exist in
the multicast routing table.
If a better route is found, the multicast static route might also fail.
Solution
Use the display multicast routing-table static config command to view the detailed configuration
1.
information of multicast static routes to verify that the multicast static route has been correctly
configured and that the route entry exists.
Use the display multicast routing-table static command to view the information of multicast static
2.
routes to verify that the multicast static route has been correctly configured and that the route entry
exists in the multicast routing table.
Check the type of the next hop interface of the multicast static route. If the interface is not a point-to-
3.
point interface, be sure to specify the next hop address for the outgoing interface when you
configure the multicast static route.
Check that the multicast static route matches the specified routing protocol. If a protocol was
4.
specified in multicast static route configuration, enter the display ip routing-table command to check
if an identical route was added by the protocol.
Check that the multicast static route matches the specified routing policy. If a routing policy was
5.
specified when the multicast static route was configured, enter the display route-policy command to
check the configured routing policy.
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