Peer Filtering

Martin Barry marty at
Tue Feb 3 01:34:11 UTC 2009

$quoted_author = "Paul Stewart" ;
> I would like to know whether folks are limiting their peering sessions
> (BGP peering at public exchanges) only by max-prefix typically?  Are we
> the only folks trying to filter all peers using IRR information?
No, you're not the only ones.
> We've run across several peers now with 10,000+ prefixes who do not
> register barely half their prefixes in an IRR ... meaning that we deny
> the rest by default.

Most peering agreements I have read require either registration of routes in
an appropriate place or notification to the other party of an appropriate
filter for their routes and/or AS path.

In Au we have multi-lateral peering exchanges and at least the one $work is
on requires registration of routes with the exchange provider who generates
the appropriate filters.

supine: From the Latin for "lying on one's back," to be supine has come to mean
"inactive." But as Damien Hirst suggests with his maxim "Minimum effort for
maximum effect," there's nothing wrong with being inactive. 

"An Idler's Glossary" -

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