[c-nsp] Redistributing static routes in BGP

Ibrahim Abo Zaid ibrahim.abozaid at gmail.com
Wed Apr 23 16:33:50 EDT 2008


Yes Gary this is a default behavior performed by BGP Scanner process which
validates NH reachability and manages BGP advertisements and BGP doesn't
advertise routes not exist in RIB

but if u configure a static route with NH as IP instead of interface , even
if the interface went down and its connected route removed from RIB , IOS
assumes NH IP will still reachable over supernet or default route and so the
route still in RIB although it is stale and still advertised in BGP .


but if you need to make BGP process reacts faster to NH reachability , you
can deploy NH address tracking feature (which is enabled by default in newer
IOS but its timers are tunable)


best regards
--Abo Zaid
On 4/23/08, Tassos Chatzithomaoglou <achatz at forthnet.gr> wrote:
>
>
>
> Peter Rathlev wrote on 23/4/2008 8:48 μμ:
>
> >
> > (Or convince Cisco to implement BFD for static routes in regular IOS...)
> >
> > Regards,
> > Peter
>
> Isn't that supported in SRC? Or maybe i misunderstood the regular
> keyword...
>
> --
> Tassos
>
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> >
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