[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
BGP next-hop
Yes, I believe the command is "show ip bgp rib-failure". This shows routes that are in the BGP table, theoretically eligible to be used as actual traffic-forwarding routes, but are failing to be inserted into the Routing Information Base (RIB) for one reason or another. I don't have a lab router handy to lab it up, and of course on my normal production router it comes up empty (lists column headers, but no routes) because I don't have any edge cases on there right now. But I think this is what you want.
-- Jeff Saxe
Network Engineer, Blue Ridge InternetWorks
Charlottesville, VA
________________________________________
From: Heath Jones [hj1980 at gmail.com]
Sent: Thursday, September 30, 2010 5:49 AM
To: nanog at nanog.org
Subject: BGP next-hop
Hi all,
Is there an easy way to see which iBGP routes are not being selected
due to next-hop not being in IGP?
Before and after IGP route added shown below, note both are marked as valid..
-- BEFORE IGP--
AS5000_LA#show ip bgp
BGP table version is 5, local router ID is 10.0.0.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
* i100.10.0.0/16 10.0.0.10 0 100 0 2000 3000 ?
*> 10.0.0.6 0 1000 3000 3000 ?
-- AFTER IGP--
AS5000_LA#show ip bgp
BGP table version is 6, local router ID is 10.0.0.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i100.10.0.0/16 10.0.0.10 0 100 0 2000 3000 ?
* 10.0.0.6 0 1000 3000 3000 ?
Cheers
Heath
ps. I've posted this to cisco-nsp also (a day ago) - so apologies in
advance if you are on both and seeing it twice.