drew.weaver at thenap
Jan 22, 2008, 10:15 AM
Views: 3067
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RTBH - anyone using this?
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I’m following this guide:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6642/prod_white_paper0900aecd80313fac.pdf
if anyone knows of a better one please do enlighten me ☺
Everything works a lot better than I imagined it would except for one issue and one question.
Question: There is simply no reason to be exporting the routes from the edge routers to the triggers if I am reading this document correctly. Rather than using prefix or filter lists, is there a handy way to make the edge routers not send routes to the trigger server (using a command in that peer-group?)
The issue I am having is kind of strange and I’ve never ran across it before like many of my issues…..
RTBH has you add a static route on the edge routers which acts as a next-hop for the routes which are sent by the trigger server/router. For whatever reason the routes sent by the trigger server/router aren’t being entered into my routing table on the Edge routers because it is giving me RIB failures:
LAB01#sh ip bgp nei 10.1.0.11 routes
BGP table version is 476702490, local router ID is 10.1.0.9
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
r>iblocked/28
192.0.2.1 0 200 0 i
LAB01#sh ip route 192.0.2.1
Routing entry for 192.0.2.1/32
Known via "static", distance 1, metric 0 (connected)
Tag 50
Redistributing via ospf 1
Routing Descriptor Blocks:
* directly connected, via Null0
Route metric is 0, traffic share count is 1
Route tag 50
Clearly there is a route to 192.0.2.1 with a destination of Null so it does appear to be a valid route, yet bgp refuses to add the “blocked/28” route to the routing table.
Has anyone ran into this before?
Thanks!
-Drew
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RTBH - anyone using this?
