[j-nsp] Troubleshooting BGP

Paolo Lucente pl+list at pmacct.net
Fri Oct 9 11:06:13 EDT 2009

Just to add the greatest value i've found myself in a feature like the
"advertise-inactive" is for analysis purposes (ie. on a something that
peers to the BGP speaker) rather than routing. 


On Thu, Oct 08, 2009 at 06:41:52PM -0400, Stefan Fouant wrote:
> I see your point here, but we weren't talking about readvertising an
> IGP route into BGP, but rather how to get the inactive BGP route
> advertised.  Sure there are corner cases where advertise-inactive is
> handy, but in general I've seen it bring about many more operational
> issues than it tends to resolve...
> Just my $.02.
> On 10/8/09, Richard A Steenbergen <ras at e-gerbil.net> wrote:
> > On Thu, Oct 08, 2009 at 05:26:01PM -0400, Stefan Fouant wrote:
> >> I would agree.  I've always been under the impression that the
> >> advertise-inactive was for people who were too lazy to actually fix their
> >> underlying routing issues.  But I'd have to say it certainly came in handy
> >> on more than one occasion during my Juniper lab exams ;)
> >
> > There are many legitimate reasons why you might need to advertise a
> > route learned from your IGP via BGP. Keeping a tidy IGP is commendable
> > (though there are also many legitimate reasons why you carry extra
> > routes in your IGP to act as nexthops for your other bgp routes, vs
> > resetting everything to loopback), but IMHO refusing to configure
> > advertise-inactive to keep your network working properly in the face of
> > what is otherwise a relatively minor nit is pure masochism.
> >
> > --
> > Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> > GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
> >
> -- 
> Stefan Fouant

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