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Wednesday, April 21, 2010

Question 5

What are the different methods when creating Rendezvous Points?


1 comments:

Packets Analyzed said...

There are 3 methods used when creating Rendezvous points.

Static assignment
"ip pim rp-address 10.1.1.1 (ACL)" command is entered on all routers, can be used to dictate what groups use what RP.
All other routers point to the RP
RP points to itself

Auto-RP (Cisco-Only) - Uses 224.0.1.39 and 224.0.1.40 (uses "ip pim sparse-dense-mode" on all interfaces - dense mode to discover the RP then uses sparse mode) or use "ip pim sparse-mode" and add the following command "ip pim auto rp listener" allows dense mode exception for 224.0.1.39/40
RP - "ip pim send-rp-announce serial 1/0 scope (ttl) group-list (ACL)" can be used to dictate what groups use what RP.
"ip pim send-rp-discovery scope (ttl)"- discovers what RP's are used for what multicast groups (called mapping-agent) best placed on the hub

Bootstrap Router (BSR-IETF)"ip pim sparse-mode" only. uses 224.0.0.13 (link local multicast)BSR is like the mapping agent in Auto-RP. RP is the same in both Auto and BSR.
BSR candidates "ip pim bsr-candidate serial 1/0 (hash#)(pri#)"
RP candidates "ip pim rp-candidate serial 1/0(ttl) (priority) group-list #
BSR elected based on highest priority or highest IP. You may want to share multicast IP's with your ISP but you do not want to have 1 multicast domain with your ISP. When communincated with ISP on all edge interfaces use "ip pim bsr-border, this will share PIM messages but not bsr messages.

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