BGP-EIGRP Redistribution

[cisco.net]

Dear Experts,

We have stucked with a redistribution scenerio of BGP-EIGRP & EIGRP-BGP.

Connectivity is like, We have a core network of 4 EIGRP routers (R1-R2-R3-R4)  and from R2 & R3 1-1 BGP configured Rts are connected respectively.

redistribution commands configured but still BGP Rtr to EIGRP RTr is not reachable. and reverse is happening fine i.e EIGRP to BGP reachability is fine.

router eigrp 100
redistribute bgp 200
network 100.192.12.16 0.0.0.3
default-metric 10000 100 255 100 1500
no auto-summary
!

router bgp 200
no synchronization
bgp log-neighbor-changes
bgp redistribute-internal
redistribute eigrp 100
neighbor 100.100.50.2 remote-as 100
no auto-summary

[cadet alain]

Hi,

please post topology diagram( no with Visio please) and also tell us on which router are the config you posted then do a sh ip bgp and sh ip ro bgp as well as sh ip ro eigrp on each router.

Regards.

Alain.

[cisco.net]

Hi Alain,

Configuration belongs to R2 (EIGRP Rtr (Edge Rtr which is connected to BGP Rtr-A). Same commands are configured at R3 (EIGRP rtr which is connected to BGP RTR-B).

[cadet alain]

but still BGP Rtr to EIGRP RTr is not reachable. and reverse is happening fine i.e EIGRP to BGP reachability is fine

Could you explain further and post the outputs I asked in previous post as well as sh ip int br and sh run | s bgp and sh run | s eigrp if you don't provide annotated diagram.

Regards.

Alain.

[Latchum Naidu]

Hi,

See the below which I have configured in my network and working well in both ways.

router eigrp 300
redistribute connected
redistribute static
redistribute bgp 4100 metric 10000 1000 255 1 1500
network 192.168.xxx.0
network 192.168.xxx.0
no auto-summary

router bgp 4100
no synchronization
bgp router-id 10.46.21.1
bgp log-neighbor-changes
bgp bestpath as-path ignore
bgp redistribute-internal
network 10.10.10.0 mask 255.255.255.0
network 10.20.20.0 mask 255.255.255.0
network 10.30.300.0 mask 255.255.255.0
redistribute connected
redistribute static
neighbor 10.46.2.xx remote-as 1
neighbor 10.46.2.xx soft-reconfiguration inbound
neighbor 192.168.xxx.0 remote-as 4100
neighbor 192.168.xxx.1 password 7 **********************
maximum-paths 3
no auto-summary

Hope the above will help you.

Please rate the helpfull posts.
Regards,
Naidu.

[cisco.net]

Hi Alain,

Well, let me again try to make myself clear about the topology.

We having a four EIGRP running rtr (R1-R2-R3-R4)

EIGRP R1 is connected to a BGP-R2

EIGRP R3 is connected to a BGP-R1

EIGRP R2 & R4 are simply a EIGRP speaking router acting as a Transit for connectivity.

Now When we are pinging from EIGRP R3 to BGP R2 ..the same is fine. But when we are pinging reverse it's not happening,

In short , the communication between both the BGP RTRs is not happening , they are still unrechable for each other.

[Jon Marshall]

It's still not clear how this is setup eg.

you say pinging from R3 -> BGP R2 is fine but the reverse doesn't work but then conclude from that that the BGP routers are not communicating with each other. But R3 is not a BGP speaking router.

Also i'm assuming BGP R1 AND R2 are different routers from EIGRP R1 & R2 ? - is that correct.

It really would help us to help you if you could -

1) supply a very brief topology diagram - can simply be a quick drawing, nothing complicated

2) describe the exact nature of the problem ie. when you mention pinging be specific about what is the source and what is the destination

Jon