30 Jun
2015
30 Jun
'15
2:44 p.m.
On Jun 30, 2015, at 9:41 AM, Job Snijders <job@instituut.net> wrote:
In addition to the BGP community scheme, outbound as-path filters could help. Most network's list of transit providers is fairly static, it would be easiy with as-path filters to prevent announcing upstream routes to other upstreams or peering partners.
Except that this was not a route leak per se. The announced routes AS_PATH shows them as originated by the offending AS, not *propagated* by the offending AS. So the outbound AS_PATH did not retain the upstream portion of the path. --Sandy