as a router-id. A PIM First Hop router will register the source with the closest RP. The first RP that
receives the register will re-encapsulate the register to all other Anycast RP peers. Please refer to
Figure 9 as described in the configuration of PIM Anycast RP 100.1.1.1.
device(config)#interface loopback 2
device(config-lbif-2)#ip address 100.1.1.1/24
device(config-lbif-2)#ip pim-sparse
device(config-lbif-2)#interface loopback 3
device(config-lbif-3)#ip address 1.1.1.1/24
device(config-lbif-3)#ip pim-sparse
device(config-lbif-3)#router pim
device(config-pim-router)#rp-address 100.1.1.1
device(config-pim-router)#anycast-rp 100.1.1.1 my-anycast-rp-set
device(config-pim-router)#ip access-list standard my-anycast-rp-set
device(config-std-nacl)#permit host 1.1.1.1
device(config-std-nacl)#permit host 2.2.2.2
device(config-std-nacl)#permit host 3.3.3.3
The RP shared address 100.1.1.1 is used in the PIM domain. IP addresses 1.1.1.1, 2.2.2.2, and
3.3.3.3 are listed in the ACL that forms the self inclusive Anycast RP set. Multiple anycast-rp instances
can be configured on a system; each peer with the same or different Anycast RP set.
NOTE
The PIM software supports up to eight PIM Anycast-RP routers. All deny statements in the
anycast_rp_set acl and additional routers more than eight listed in an access list are ignored.
The example shown in the following figure is a PIM Anycast-enabled network with 3 RPs, 1 PIM-FH
router connecting to its active source and local receiver. Loopback 2 in RP1, RP2, and RP3 have the
same IP addresses 100.1.1.1. Loopback 3 in RP1, RP2, and RP3 each have separate IP addresses
configured to communicate with their peers in the Anycast RP set.
FIGURE 9 Example of a PIM Anycast RP network
Displaying information for a PIM Anycast RP interface
To display information for a PIM Anycast RP interface, enter the following command.
device(config)#show ip pim anycast-rp
Number of Anycast RP: 1
Anycast RP: 100.1.1.1
ACL ID: 200
ACL Name: my-anycast-rp-set
ACL Filter: SET
Peer List:
1.1.1.1
2.2.2.2
3.3.3.3
Syntax: show ip pim [vrf vrf-name ] anycast-rp

Displaying information for a PIM Anycast RP interface

142 FastIron Ethernet Switch IP Multicast Configuration Guide
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