IPv6 PIM Register Message Filter Rule

PIMv6 register messages received from a downstream multicast designated router (DR) should be filtered for reserved or any other undesirable multicast groups.

The IPv6 PIM register message filter rule interacts with configured extended IP access control lists (ACLs) at software level to take action to either permit or deny register messages for matching (S, G) IP address rules in the RP. When a deny ACL action matches, the RP sends a register stop message to the DR to further limit new register messages.

Networks that do not maintain a multicast domain and require only the IP multicast service will be required to stand up a PIM-SM router that will be incorporated into the JIE shared tree structure by establishing a peering session with an RP router. This helps to mitigate against risks in order to provide a secured IP core network. All RP devices that are peering with customer PIM-SM routers implement a PIM import policy to block multicast registration requests for reserved or any other undesirable multicast groups.

Note: In an RP, where both the PIM register message filter rule and the PIM register message rate limit are configured, filtering functionality takes precedence over rate limiting.
Note: Register message filtering depends on the availability of ACL resources in the network.

In this section:

  1. Configuring the Register Message Filter Rule for PIMv6
    Complete the following steps to configure the register message filter rule for PIMv6 so that unauthorized multicast sources or groups are blocked.
Parent topic: Multicast Listener Discovery and Source-specific Multicast Protocols