77
[SwitchA] interface vlan-interface 102
[SwitchA-Vlan-interface102] pim dm
[SwitchA-Vlan-interface102] quit
# Enable IP multicast routing and PIM-DM on Switch B in the same way Switch A is configured.
(Details not shown.)
4.
Display RPF information for Source 2 on Switch B and Switch C.
[SwitchB] display multicast rpf-info 50.1.1.100
[SwitchC] display multicast rpf-info 50.1.1.100
No output is displayed because no RPF routes to Source 2 exist on Switch B or Switch C.
5.
Configure a static multicast route:
# Configure a static multicast route on Switch B and specify Switch A as its RPF neighbor on the
route to Source 2.
[SwitchB] ip rpf-route-static 50.1.1.100 24 30.1.1.2
# Configure a static multicast route on Switch C and specify Switch B as its RPF neighbor on
the route to Source 2.
[SwitchC] ip rpf-route-static 10.1.1.100 24 20.1.1.2
Verifying the configuration
# Display RPF information for Source 2 on Switch B.
[SwitchB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: Vlan-interface102, RPF neighbor: 30.1.1.2
Referenced route/mask: 50.1.1.0/24
Referenced route type: multicast static
Route selection rule: preference-preferred
Load splitting rule: disable
# Display RPF information for Source 2 on Switch C.
[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
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.
Solution
To resolve the problem: