From: Dillon Yang (gzdillon@hotmail.com)
Date: Mon Mar 07 2005 - 12:29:48 GMT-3
I think it is a sync problem, not router-id.
I'd met a situation like this:
R5 bgp 5, reflector server, FR spoke
ospf
R2 bgp 5,reflector client, FR hub
ospf
R1 bgp 5, reflector client, FR spoke
directly
R3 bgp 3
If I enable sync, the R2 can not receive routes from R3 for R5 declares it is not best.
If I disable syn, the R2 receives all routes from R3.
Any advice?
dillon
> Bob Sinclair <bsin@cox.net> wrote:
> KC
>
> Could you send the output of "sh ip route 3.0.0.0" ? This will verify the RID
> of the OSPF ASBR. I see that the bgp source RID is 172.16.123.1 from
> neighbor address 172.16.123.3. The "via" 172.16.123.3 in the sh ip route
> output does not necessarily indicate the RID of the OSPF ASBR, however.
>
> Bob Sinclair
> CCIE #10427, CCSI 30427, CISSP
> www.netmasterclass.net
>
> ----- Original Message -----
> From: k c
> To: ccielab@groupstudy.com
> Sent: Saturday, February 19, 2005 11:23 AM
> Subject: BGP route cannot advertise to neighor (sync problem)
>
>
> Hi Group,
>
> R2 cannot advertise 3.0.0.0/8 to R1 due to synchronization. But why? BGP and
> ospf router ids are the same. ospf has route 3.0.0.0/8 and bgp has 3.0.0.0/8
> route, why it cannot be advertised to R1
> R2 config:
> router bgp 64600
> synchronization
> bgp router-id 172.16.123.2
> bgp log-neighbor-changes
> network 2.2.2.0 mask 255.255.255.0
> neighbor 172.16.123.1 remote-as 100
> neighbor 172.16.123.3 remote-as 64600
> no auto-summary
> sh ip route ospf
> O IA 3.0.0.0/8 [110/65] via 172.16.123.3, 00:31:32, Serial4/0
> sh ip bgp
> * i3.0.0.0 172.16.123.3 0 100 0 i
> R2#sh ip bgp 3.0.0.0
> BGP routing table entry for 3.0.0.0/8, version 14
> Paths: (1 available, no best path)
> Not advertised to any peer
> Local
> 172.16.123.3 from 172.16.123.3 (172.16.123.1)
> Origin IGP, metric 0, localpref 100, valid, internal, not
> synchronized
>
> Thanks,
>
>
>
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