Users Guide

Table Of Contents
Supported
Releases
10.4.3.0 or later
Anycast RP using PIM
PIM Anycast RP provides load balancing and redundancy capabilities for Rendezvous Point (RP) routers in a multicast domain.
This feature allows you to configure two or more RPs with same IP address (RP address) in a multicast group. The shared RP
address is advertised in Interior Gateway Protocol (IGP). The RP routers that share the same RP address form an Anycast RP
set. Each router in the Anycast RP set is configured with two IP addresses: a shared RP address on the Loopback interface
and a separate, unique IP address. The unique IP address is used for communication between the RPs. The Loopback address
must be reachable to all PIM routers in the multicast domain. This configuration allows the RPs to share the load for source
registration and to act as back-up routers for each other.
PIM enables multiple RPs to inform each other about active sources. When a source registers with an RP, that RP sends a PIM
register message to all other members of the RP set informing that there is a new active source. Thus, each RP in the multicast
domain knows about the active sources of the other RPs.
IGP protocols such as OSPF routes the sources and receivers to the RPs with the best route. Packets sent to the RP address
are delivered to the nearest RP with this address. When an RP with the best route fails, IGP automatically recalculates the best
route and takes the sources and receivers to the closest operating RP. This failover mechanism ensures that connectivity is
maintained, and traffic disruption is minimal.
NOTE: PIM Anycast RP is not supported on the S3048-ON switch.
Configure PIM Anycast RP
To configure PIM Anycast RP, enable PIM-SM and IGP on the participating Loopback interfaces. Also, configure Loopback
interfaces with unique IP addresses on each of the RPs.
To configure static Anycast RP:
1. Enter CONFIGURATION mode.
OS10# configure terminal
OS10(config)#
2. Configure the rendezvous point (RP) IP address statically and specify the multicast group address range. The RP address
must be reachable across the PIM domain.
OS10(config)# ip pim rp-address 100.1.1.1 group-address 224.0.0.0/4
3. Configure PIM Anycast RP peer addresses for the specified Anycast-RP address.
OS10(config)# ip pim anycast-rp 100.1.1.1 192.10.1.1
OS10(config)# ip pim anycast-rp 100.1.1.1 192.10.2.2
OS10(config)# ip pim anycast-rp 100.1.1.1 192.10.3.3
4. Verify the configuration.
OS10# show ip pim rp mapping
Anycast-RP 100.1.1.1 members:
192.10.1.1* 192.10.2.2 192.10.3.3
PIM Group-to-RP Mappings
Group(s): 224.0.0.0/4, Static
RP: 100.1.1.1,v2
The asterisk (*) in the output denotes the local IP address.
Example configuration with PIM Bootstrap
1090
Multicast