[c-nsp] Using same AS number

[Phil Mayers]

Rudy Setiawan wrote:
> Hi all,
> 
> As per BGP rule, that if a router sees its own AS in the path, it will
> filter them out of the prefixes.
> 
> So if I have two locations with different providers and no direct
> connection to each other, what's the best way to be able to use the
> same AS and yet still sees the prefixes/routes?

use "allowas-in"

i.e.:

router bgp xxxx
  neighbor a.b.c.d allowas-in 1

Beware; I've seen different behaviour on the Ciscos (where the command 
*seems* to only be needed on eBGP peering - other iBGP peers just take 
the routes) and junipers (where the equivalent command[1] needs to be 
present on all routers in your AS)

[1] On Juniper, you need:

protocols {
     bgp {
         local-as xxxx loops 3;
     }
}


> 
> Thank you all in advance for the help.
> 
> Regards,
> Rudy
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/