Re: [pim] Re: BSM: is it bidir or ASM

[Nidhi Bhaskar <nbhaskar at cisco.com>]

> > I'll discuss with other authors and get back to you. The options seem
> > to be to either explicitly make a decision to include only one range
> > at the BSR or see if we can find a backwards compatible way to include
> > both...
>
> Great, one other point for you to consider is how things can get messed
> up on the BSR itself.
>
> The BSR is responsible for tracking all the RP-candidates and so it would
> know that one RP was bidir while the other was ASM and so it may refer
> to its RP-cache and find a different RP than the BSR clients would.
> (This might be an implementation question, but I'm pretty sure that
> most implementations will have this problem)

Yes, I think this is an implementation issue.

The spec already states that the BSM may contain only a subset of the
mapping cache available at the BSR. We could add in some text to
indicate that when this is the case the BSR should only consider this
subset to determine the groups mode/RP. But it seems obvious...

Nidhi.

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