From: Luis Rueda (luis.rueda@comsat.com.co)
Date: Mon May 01 2006 - 15:45:32 ART
Keep also in mind that AutoRP is a PIMv1 feature while BSR is PIMv2,
just in case you get something like use PIMv2.
Regards,
Luis
-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
Petr Lapukhov
Enviado el: Monday, May 01, 2006 7:48 AM
Para: Kobus Van Rooyen
CC: ccielab@groupstudy.com
Asunto: Re: BSR-candidate vs IP PIM SEND-RP-DISCOVERY
Basically, there are some important differences between AutoRP and BSR.
1) AutoRP uses two PIM Dense mode groups to collect and dessiminate
RP-to-groups mapping information. So you need groups 224.0.1.39/40 to be
in dense mode.
That's why you need either "pim sparse-dense mode" or "autorp listener +
pim sparse".
2) BSR on the other hand, floods it's announces hop-by-hop, using PIM
messages.
This flooding is constrained with RPF checks When RP hears BSR, it
_unicasts_ it's group set back to bootstrap router. BSR grabs that
information, and adds RP to group set mappings to BSR announces.
3) With AutoRP mapping agent maps groups to RPs. With BSR every PIM
router receives full RPs to groups mappings list. And every router maps
groups to RPs on it's own.
4) You may have multiple mapping agents with AutoRP. They just need to
announce consistent mapping information. With BSR, a single bootstrap
router is elected.
If it fails, another candidate takes over BSR role.
HTH
Petr
2006/5/1, Kobus Van Rooyen <cciein2010@webmail.co.za>:
>
> My require assistance with above. When must one use BSR-candidate vs
> "ip pim send-rp-discovery" in multicast when asked to setup one router
> to be responsible for RP mappings?
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