Re: pim auto-rp priority missing?

Summary of a top of my head (for AutoRP, not for BSR)

1. Configure "ip pim rp-address x.x.x.x" where x.x.x.x is an address of the
backup. By default, PIM prefers dynamically discovered RP before statically
configured, therefore AUTO-RP selection will be PRIMARY. Manually configured
will be the STANDBY. This is a combination of dynamic/static mappings, and
needs fully functional auto-rp first.

2. Higher/lower IP address for PRIMARY/STANDBY

3. Same RP address, interconnect with MSDP (will not function without MSDP)

4. Advertise PRIMARY for specific scope (like /24 prefix) and broader scope
for STANDBY (like the whole /4 mcast prefix). Router will natively prefer
best match, and therefore more specific scope. Beware - #4 can be
problematic in practice.

On Fri, Apr 3, 2009 at 5:28 PM, Wouter Prins <wp_at_null0.nl> wrote:

> hi list,
>
> I was wondering how to create a backup RP for a certain group when using
> Auto-RP. I cannot configure any priorities as you can when configuring it
> for use with a bsr?
> I checked the doccd but i am not able to find a similar function? How does
> the mapping-agent decide which RP to use when two RP's announce them same
> groups in Auto-RP mode?
>
> Thanks,
> --
> Wouter Prins
> wp_at_null0.nl
> 0x301FA912
>
>
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