try 'no sync' in your BGP config.
A show IP bgp would help too.
Might try 'next-hop-self' on neighbor statement to R4.
""Sean Wu"" <[EMAIL PROTECTED]> wrote in message
8rgfm3$ce4$[EMAIL PROTECTED]">news:8rgfm3$ce4$[EMAIL PROTECTED]...
> So what possible reason can cause this problem?
>
> I have four routers,
>
> R1 <-------> R2
> ^ ^
> | |
> | |
> | |
> v v
> R3 <-------> R4
>
> AS1: R1
> AS2: R2
> AS3: R3+R4
> IBGP between R3 and R4, EBGP between R1/R2, R2/R4, R1/R3
> Everything else looks fine, and almost symetric configuration on R1/R3 and
> R2/R4
> But R3 can see R2 in routing table and BGP table, while
> R4 doesn't see R1's ip in ip routing table, but it does see R1 in BGP
table
> via two different paths
>
> Any idea?
>
> Thanks,
>
>
> Sean
>
>
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