North American Network Operators Group

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Re: Reducing Usenet Bandwidth

  • From: Stephen Griffin
  • Date: Mon Feb 11 21:32:49 2002

In the referenced message, Jared Mauch said:
> 	I think you are refering to cisco bugid: CSCdv47188
> -- snip --
> If the first entry in the Multicast Border Gateway Protocol (MBGP)
> routing table is supernet of the destination IP address or the MBGP
> route exists but does not have the best path, Reverse Path Forwarding
> (RPF) lookup will fail or return a unicast Border Gateway Protocol (BGP)
> route if a unicast BGP route exists.
> Workaround: Remove the first entry or add a dummy route that is
> smaller than the first entry. In case of a MBGP route without a best
> path, change the network configuration to ensure that the specified
> destination address has the best path.
> -- snip --

This does seem to resemble the issue, but in my discussion with cisco
it didn't seem they intended on deploying resources on the corner
cases I described. I'll check to see how the above bug relates to
those issues.