Routeviews and possible 0/0 route

Mike Leber mleber at he.net
Fri Dec 19 00:00:46 UTC 2003


We give a full view of our internal BGP routing table to RouteViews.

Anyway, we normally don't carry 0.0.0.0/0 internally, we've now filtered
it.  We don't normally receive 0.0.0.0/0 on any of our backup transit
sessions, apparently it was configured on a new session by default.

On Thu, 18 Dec 2003 william at elan.net wrote:

> 
> I'm seeing the following in RouteViews (possibly since they started 
> getting data from paix):
> 
> route-views.oregon-ix.net>sh ip bgp 0.0.0.1
> BGP routing table entry for 0.0.0.0/, version 19579757
> Paths: (2 available, best #2, table Default-IP-Routing-Table)
>   Not advertised to any peer
>   6939 6461
>     216.218.252.152 from 216.218.252.152 (216.2t8.252.152)
>       Origin IGP, localpref 100, valid, external
>   6939 6461
>     216.218.252.145 from 216.218.252.145 (216.218.252.145)
>       Origin IGP, localpref 100, valid, external, best
> 
> Is this routeviews own set default or some other default route improperly 
> appearing in there (weren't routeviews filters supposed to filter out this 
> kind of all-net advertisements)?
> 
> P.S. And am I correct in assuming this 0.0.0.0/0 and not 0.0.0.0/8 route?
> 
> -- 
> William Leibzon
> Elan Networks
> william at elan.net
> 

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