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New Member

BGP rib failure on directly connected EBGP neighbours

Hi all,

I have two Routers directly connected by fast ethernet interface.

They are in different AS.

R1  config

network 20.1.46.0 mask 255.255.255.0

neighbor 20.1.46.1 remote-as 7500

we can see that R1 is advertising route 

sh ip bgp
BGP table version is 2, local router ID is 100.100.100.100
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
*> 20.1.46.0/24     0.0.0.0                  0         32768 i

R2 

R2#sh ip bgp
BGP table version is 6, local router ID is 20.1.46.1
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> 20.1.46.0/24     20.1.46.2                0             0 6500 i

R2# sh ip bgp rib-failure
Network            Next Hop                      RIB-failure   RIB-NH Matches
20.1.46.0/24       20.1.46.2           Higher admin distance              n/a


R2# sh ip route 20.1.46.2
Routing entry for 20.1.46.0/24
  Known via "connected", distance 0, metric 0 (connected, via interface)
  Routing Descriptor Blocks:
  * directly connected, via FastEthernet0/0
      Route metric is 0, traffic share count is 1

Questions

1>So my understanding is that R2 does not installed BGP External route in Main routing table as EBGP AD is 20 and its more than directly connected

route which is 0 right??????????

2> secondly my understanding is that R2 is learning about route 20.1.46.0  by two ways-------

--------------- BGP and as directly connected right???

3>Is their any way that R2 can show 20.1.46.0 as BGP route in main routing table???????

Thanks

MAhesh

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

BGP rib failure on directly connected EBGP neighbours

Hi Mahesh,

1>So my understanding is that R2 does not installed BGP External  route in Main routing table as EBGP AD is 20 and its more than directly  connected route which is 0 right??????????

Yes, that is correct.

2> secondly my understanding is that R2 is learning about route 20.1.46.0  by two ways: BGP and as directly connected right???

Yes, that is also correct.

3>Is their any way that R2 can show 20.1.46.0 as BGP route in main routing table???????

No while the network is directly connected.

Best regards,

Peter

2 REPLIES
Cisco Employee

BGP rib failure on directly connected EBGP neighbours

Hi Mahesh,

1>So my understanding is that R2 does not installed BGP External  route in Main routing table as EBGP AD is 20 and its more than directly  connected route which is 0 right??????????

Yes, that is correct.

2> secondly my understanding is that R2 is learning about route 20.1.46.0  by two ways: BGP and as directly connected right???

Yes, that is also correct.

3>Is their any way that R2 can show 20.1.46.0 as BGP route in main routing table???????

No while the network is directly connected.

Best regards,

Peter

New Member

BGP rib failure on directly connected EBGP neighbours

Hi Peter,

Many thanks for reply back.

Regards

MAhesh

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