Re: Strange BGP announcement.

[Andrew Bangs <andrewb () demon net>]

> > Problem at AS6218 perhaps ? (of course if this is the result of some
> > random corruption that can't be relied on... )
> >
> > Anyone else see anything ? 

Dave Curado wrote:
> Another note on this, I wasn't able to stop the updates
> with a filter-list... perhaps because the AS path is 
> problematic.  I had to use a distribute list instead, listing
> each of the networks that 6218 is aggregating for...

Yeah. Had that same problem when talking with one of my 
upstreams...

> Not sure if this affects anyone else or not, but:
>
> access-list 21 deny 206.53.128.0 0.0.3.255
> access-list 21 deny 206.53.128.0 0.0.0.255
> access-list 21 deny 206.53.129.0 0.0.0.255
> access-list 21 deny 206.53.130.0 0.0.0.255
> access-list 21 deny 206.53.131.0 0.0.0.255
> access-list 21 deny 206.148.144.0 0.0.3.255
> access-list 21 deny 206.190.224.0 0.0.0.255
> access-list 21 permit any

You're missing 207.142/20 and 207.142.32/19 from that list.
At least.. they were being aggregated by 6218 earlier tonight 
from my vantage point.


 Regards,
 Andrew
-- 
Andrew Bangs, Network Engineering Manager, Demon Internet Ltd
andrewb () demon net  http://www.demon.net/ http://www.demon.nl/
Network Engineering: +44 (0)181 371 1204   networks () demon net