Configuring a Static Multicast Route
Static multicast routes have the functions of changing Reverse Path Forwarding (RPF) routes and connecting RPF routes.
Prerequisites
Before configuring a static multicast route, complete the following tasks:
Configuring a unicast routing protocol
Configuring basic multicast functions
Context
Static multicast route has the following functions:
Changing Reverse Path Forwarding (RPF) route
If the topology of multicast is the same as that of unicast, the transmission path of multicast data is the same as that of unicast data. Users can change the RPF route by configuring a static multicast route. Therefore a transmission path of the multicast data, which is different from the transmission path of unicast data, is established.
Connecting RPF route
In the network segment where unicast routes are blocked, when multicast static routes are not configured, packets cannot be forwarded because there is no RPF route. You can configure multicast static routes. Therefore, the system can generate RPF routes, complete RPF check, create routing entries, and guide the forwarding of packets.
When configuring a static multicast route, configure the outgoing interface through the command if the next hop is in the point-to-point format. If the next hop is not in the point-to-point format, you must use the next hop.
Procedure
- Access the system view.
- Configure a static multicast route.
ip rpf-route-static [ vpn-instance vpn-instance-name ] source-address { mask | mask-length } [ isis process-id | ospf process-id | rip process-id | bgp | static ] [ route-policy route-policy-name ] { rpf-nbr | interface-type interface-number } [ preference preference ] [ order order-number ]
The parameters of the command are explained as follows:
source-address { mask |mask-length }: specifies a source address and mask.
isis process-id, ospf process-id, rip process-id, bgp, static: specifies that the matching route must be present in the specified unicast routing protocol. protocol specifies a unicast routing protocol. process-id specifies the ID of a process.
route-policy route-policy-name: specifies the matching rule of the static multicast route.
rpf-nbr: specifies the next hop address that acts as the IP address of the RPF neighbor.
interface-type interface-number: specifies the type and the number of the outgoing interface. The outgoing interface acts as the RPF interface.
preference preference: specifies the preference of the route. The greater the preference value is, the lower the preference is.
order order-number: specifies the configuration order of routes on the same network segment.