[j-nsp] Sending iBGP prefixes to another iBGP neighbour

Mike Williams mike.williams at comodo.com
Thu May 5 13:17:57 EDT 2016


Wow, fast responses!

Simply setting "cluster <32bit thing>", turning the MX104 into a route 
reflector, sorted it right out.


Thanks all.

Mike WilliamsOn Thursday 05 May 2016 17:37:06  wrote:
> Hey all,
> 
> I could very well either be doing this completely wrong, or attempting to do
> the impossible, but...
> 
> We have BIRD on Linux using BGP to send prefixes to the MX104 over a direct
> connection, I need to send those prefixes to an MX80 directly connected to
> the 104.
> 
> At the 104 end of the 104<->80 peering there is just an export policy, that
> simply matches on "from protocol bgp" and the BGP community assigned the
> prefixes I want, then accept and next-hop self.
> 
> In isolation, the policy works.
> 
> > test policy blah <prefix>/32
> 
> ...
> ...
> 
> Policy blah: 1 prefix accepted, 0 prefix rejected
> 
> 
> The MX104 never actually advertises any prefixes to the MX80 though.
> 
> > show route advertising-protocol bgp <mx80>
> 
> ... zilch ...
> 
> 
> Is there some inbuilt protection preventing iBGP prefixes from being sent to
> another iBGP neighbour?
> Or am I just doing it wrong?
> 
> advertise-peer-as and as-override have no impact.
> 
> 
> Thanks

-- 
Mike Williams


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