[Xorp-users] Questions on multicast routing.

[Ben Greear]

Pavlin Radoslavov wrote:
>> Ok, thanks for that info.  I think I'll spend a few minutes
>> trying to understand the BSR code a bit to make sure it's not just
>> some simple problem.  I like the idea of everything just being automated,
>> since my routers may come and go from the network.
>>
>> The bootstrap code is in pim/pim_bsr.cc primarily?
> 
> It is in pim/pim_bsr.cc and pim/pim_proto_bootstrap.cc. The related
> PIM Cand-RP-Adv code is in pim/pim_proto_cand_rp_adv.cc.
> Note that when a multicast PIM Bootstrap message is received, it
> might be rejected for some reasons. One reason could be if the
> message didn't come from the RPF router toward the Cand-BSR router
> in the message. Hence, if the unicast routing is not working
> properly, the Bootstrap mechanism might fail.
> 
> If you want to understand how the BSR works in general, it is better
> to read the BSR spec (RFC 5059).

My problem was embarrassingly simple:

I just didn't have a cand-bsr entry in the bootstrap section, just a cand-rp.

Is that ever valid?  If not, maybe it would be worth warning loudly on
startup to help clueless users?

It seems to be routing fine in my 2-router scenario...I'll try much larger
configs shortly!

Thanks,
Ben



-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com