Configuring Anycast Rp; Reducing Source-Active Message Flooding - Dell C9000 Series Networking Configuration Manual

Configuring Anycast RP

To configure anycast RP:
1 In each routing domain that has multiple RPs serving a group, create a Loopback interface on each RP
serving the group with the same IP address.
CONFIGURATION mode
interface loopback
2 Make this address the RP for the group.
CONFIGURATION mode
ip pim rp-address
3 In each routing domain that has multiple RPs serving a group, create another Loopback interface on
each RP serving the group with a unique IP address.
CONFIGURATION mode
interface loopback
4 Peer each RP with every other RP using MSDP, specifying the unique Loopback address as the connect-
source.
CONFIGURATION mode
ip msdp peer
5 Advertise the network of each of the unique Loopback addresses throughout the network.
ROUTER OSPF mode
network

Reducing Source-Active Message Flooding

RPs flood source-active messages to all of their peers away from the RP.
When multiple RPs exist within a domain, the RPs forward received active source information back to the
originating RP, which violates the RFP rule. You can prevent this unnecessary flooding by creating a mesh-
group. A mesh in this context is a topology in which each RP in a set of RPs has a peership with all other RPs
in the set. When an RP is a member of the mesh group, it forwards active source information only to its peers
outside of the group.
To create a mesh group, use the following command.
• Create a mesh group.
CONFIGURATION mode
ip msdp mesh-group
Multicast Source Discovery Protocol (MSDP) 695