Discussion

The anycast PIM configuration is quite similar to that for anycast RP. On the RP
routers, configure the loopback interface with the shared RP address. This address
tells other routers in the PIM-SM domain what IP address to use for the RP address.
Mark the regular loopback address as the primary address so that address is used as
the router ID by unicast routing protocols. Verify the loopback interface configuration:
aviva@RouterA> show configuration interfaces lo0
unit 0 {
family inet {
address 192.168.13.1/32 {
primary;
}
address 10.0.1.1/32;
}
}
On RouterA, 192.168.13.1 is the primary loopback address, to be used by BGP and
OSPF as the router ID, and 10.0.1.1 is the shared RP address.
Instead of configuring the shared RP address at the [edit pim rp local] hierarchy as
you did with anycast RP, you do this one level lower, at [edit pim rp local family
inet]. You must configure three parameters: the shared RP address, a list of all the
RP routers in the PIM-SM domain (called the RP set), and the primary loopback
address of the local router. The RP set must be the same on all RP routers in the
domain so that all the RPs have a consistent view of the active sources. If the lists are
different, anycast PIM will not work. The configuration shown in this recipe looks
like this:
[edit protocols]
aviva@RouterA# show
pim {
rp {
local {
family inet {
address 10.0.1.1; #