All things related to multicast

[Peter John Hill <>]

Avoid BSR and sparse-dense mode. With auto-rp and anycast, you don't 
need any form of dense mode! If you network is pretty small and 
redundancy is not an issue, then you don't need anycast and multiple 
rps that anycast allows. There is still config that needs to be done to 
make anycast, sparse-mode, and auto-rp to work.

This is the config for one of our two core RP's

ip multicast-routing
ip multicast multipath

interface Loopback0
 description Management Interface
 ip address 128.2.4.249 255.255.255.255
 ip pim sparse-mode
 ip sap listen
!
! This IP address below is shared with our other core router
!
interface Loopback1
 description Anycast RP Interface
 ip address 128.2.1.130 255.255.255.255
 ip pim sparse-mode
!
!   So you can see below that the ip pim rp-address is the anycast rp 
address
!
ip pim rp-address 128.2.1.130 30
!    So we are telling leaf routers that ask that the rp address is the 
unique loopback0 address
ip pim rp-candidate Loopback0 group-list 11
ip pim send-rp-announce Loopback0 scope 32 group-list 11
ip pim send-rp-discovery Loopback0 scope 32

access-list 11 deny   224.0.1.39
access-list 11 deny   224.0.1.40
access-list 11 permit 224.0.0.0 15.255.255.255
access-list 30 permit 128.2.4.250
access-list 30 permit 128.2.4.249
access-list 30 permit 224.0.1.39
access-list 30 permit 224.0.1.40


On Wednesday, September 4, 2002, at 11:10  AM, Marshall Eubanks wrote:

> Thanks, Brent;
>
>    I just glanced over this, so correct me if I am wrong...
>
>   I notice that the cookbook does not talk about setting up a RP, but
> seems to treat the new network as if it will be a
> seperate PIM domain, and so will need a RP.
>
> Is it assuming that auto-RP will create a RP in this (assumed
> CISCO) domain ? But then, shouldn't it require setting PIM to "sparse 
> dense" ?
> On the other hand, isn't auto-rp the default, so that if
> you want to use BSR you have
> to turn it off  and turn on BSR ? Or am I missing something, and
> the cookbook assumes that the PIM RP will be in Abilene?
>
> In any case, it seems to me that the cookbook should address the care 
> and
> feeding of RP's.
>
> Marshall