about Auto-RP

ariela · ‎04-22-2007

Hi folks,

the topology is like this:

S - RP - MA - PIM R - Hosts

I've two questions about Auto-RP PIM mode:

1) from S (sources) to RP, and from RP to MA (mapping agent), I need to use 'sparse-dense' mode, or is enough 'sparse-mode' (without autorp listener)?

2) the best practice with Auto-RP is to use sparse mode with autorp listener, or sparse-dense mode with a "sink" RP for unknown mGroups?

Any advice will be appreciated

Regards

Andrea

Harold Ritter · ‎04-22-2007

1) Unless all the PIM routers are directly connected to the RP, you absolutely need sparse-dense mode (without autorp listener of course).

2)I would tend toward the first option, although the second one is also commonly seen. In all honesty, my personal preference is to use anycast RP.

Hope this helps,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

ariela · ‎04-22-2007

Thanks for your answer,

, if I well understood, in a word, from S to RP, and from RP to MA, I've to use sparse-dense mode. Then, from MA to all PIM routers, I could use also sparse-mode with autorp listener .. correct?

Anycast RP? I normally use Anycast RP for RP redundancy, then use Auto-RP to propagate the information (rp-announce common-IP on RP, then rp-announce-filter on MA with the common-IP only).

Any advice will be appreciated

Regards

Andrea

Harold Ritter · ‎04-22-2007

Andrea,

This is not I was eluding to. If you use one startegy you should stick to it all the way.

As I stated, I would rather suggest Anycast RP as it allows you to configure the RP statically on all PIM routers and it offers redundancy at the same time.

Hope this helps,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México