nanog mailing list archives

Re: router startup behavior


From: Danny McPherson <danny () tcb net>
Date: Tue, 15 Jan 2002 22:31:04 -0700


  

The routers in question run a BGP redistribution process every 
60 seconds and it just happened to run (quite often) just as 
filters were being rewritten, resulting in "the gunk" not being 
tagged as "keep internal" and therefore being advertised 
externally.  A subsequent run of the BGP process realized a 
policy was in place withdrew the routes.  

I should clarify here:

A subsequent run of the BGP resdistribution process with the 
newly rewritten policy in place resulted in the routes being 
tagged with the appropriate "keep internal" community and "re-
advertised".  Upon receipt of the now tagged routes, routers that
had previously announced the untagged routes withdrew them (per 
egress policy specification).

-danny


Current thread: