A few things to remember:
- multicast groups 224.0.1.39 and 224.0.1.40 are used for RP announce and discovery respectively.
- ip pim autorp listener used for sparse mode interfaces/routers so that they can receive the rp announce info in dense mode.
- I need to brush up on 10.5 - For BSR, using ip pim bsr-border will ensure dynamic RP announcements from one AS aren't propagated to the neighboring AS. For AutoRP, set up a filter to block traffic e for 224.0.1.39 and .40 and apply the filter with a multicast boundry, ie,
#int s1/0.26
#ip pim sparse-mode
#ip multicast boundary 24
#access-list 24 deny 224.0.1.39
#access-list 24 deny 224.0.1.40
#access-list 24 permit 224.0.0.0 0.15.255.255
