From: D.H. Williams (draythw@gmail.com)
Date: Tue Jun 27 2006 - 14:27:32 ART
Hey Steve,
Yes, it will still advertise to it's BGP neighbors; I tried this out, I
setup an BGP AS 200 on 3 routers:
r4 ----- r3 ----- sw2 (r3 is hub running route reflection)
These guys have ospf running, on r4 I advertised 187.1.4.0 into BGP (it is
also in ospf, to setup the RIB failure you were talking about);
below are configs and show commands;
R4:
router bgp 200
no synchronization
bgp router-id 150.1.4.4
bgp log-neighbor-changes
network 187.1.4.0 mask 255.255.255.0
neighbor 187.1.134.3 remote-as 200
no auto-summary
Rack1R4#show ip bgp neighbor 187.1.134.3 adv
BGP table version is 2, local router ID is 150.1.4.4
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
*> 187.1.4.0/24 0.0.0.0 0 32768 i
R3:
Rack1R3#srb router bgp 200
router bgp 200
no synchronization
bgp router-id 150.1.3.3
bgp log-neighbor-changes
neighbor 187.1.38.8 remote-as 200
neighbor 187.1.38.8 route-reflector-client
neighbor 187.1.134.4 remote-as 200
neighbor 187.1.134.4 route-reflector-client
no auto-summary
Rack1R3#show ip route bgp
Rack1R3#show ip bgp
BGP table version is 7, local router ID is 150.1.3.3
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>i187.1.4.0/24 187.1.134.4 0 100 0 i
Rack1R3#show ip bgp nei 187.1.38.8 adv
BGP table version is 7, local router ID is 150.1.3.3
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>i187.1.4.0/24 187.1.134.4 0 100 0 i
SW2:
SW2#srb router bgp
router bgp 200
no synchronization
bgp router-id 150.1.8.8
bgp log-neighbor-changes
neighbor 187.1.38.3 remote-as 200
no auto-summary
SW2#show ip route bgp
SW2#show ip bgp
BGP table version is 10, local router ID is 150.1.8.8
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>i187.1.4.0/24 187.1.134.4 0 100 0 i
SW2#
On 6/27/06, Skinner, Stephen <Stephen.Skinner@rbs.co.uk> wrote:
>
> guys,
>
> here is one for you.
>
> I have trawled the archive`s and have found conflicting arguments.
>
> RIB - failure in BGP.
>
> this can happens because there is a better route to the network advertised
> by igp/static in IP routing table already .
> there are other thing aswell but i am just interested in this.
>
> Does the BGP router advertise those RIB-Failed routes along with its other
> routes to its BGP peers.
>
> Cisco Doc NO
> GS peps YES
>
> does anyone have any experience in this .
>
> i am thinking if the route is in BGP but not the IP routing table, it is
> still a valid route, and should therefore be advertised to other BGP
> peers ?
>
> am i wrong ?
>
> TIA
>
> Steve
>
>
>
>
>
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