From: Dillon Yang (gzdillon@hotmail.com)
Date: Tue Mar 08 2005 - 01:48:10 GMT-3
Hi, Bob
Thank for your message.
Yes, I'm sure the router-ids are same in BGP and OSPF.
The problem, I believe, is between sync and FR hub or Reflector.
Did you meet the situation?
dillon
----- Original Message -----
From: "Bob" <cciebob@comcast.net>
To: <ccielab@groupstudy.com>
Sent: Tuesday, March 08, 2005 8:27 AM
Subject: RE: BGP route cannot advertise to neighor (sync problem)
> Make sure your router-id is the same on the redistributing router for ospf
> and bgp. That will make the route "best"
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Dillon Yang
> Sent: Monday, March 07, 2005 9:30 AM
> To: Group Study
> Subject: Re: BGP route cannot advertise to neighor (sync problem)
>
> 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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