From: OhioHondo (ohiohondo@columbus.rr.com)
Date: Fri Mar 14 2003 - 17:57:49 GMT-3
It only causes a problem when BGP has synchronization enabled, you have 2 or
more BGP routers running iBGP and the IGP for your AS is OSPF.
The BGP process checks the router-id of received iBGP prefixes against the
router-id of the OSPF learned route in the IP routing table. If the two are
not the same, the iBGP prefix is labled unsynchronized by the BGP process.
(Unsynchronized prefixes are not considered in the BGP processes calcultaion
for Best Route and are not forwarded. (i.e. If the receiving router was a
Route Reflector it would not forward the route to Route Reflector Clients.)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
ccie2be
Sent: Friday, March 14, 2003 12:58 PM
To: Group Study; Voss, David
Subject: Re: CCIE Gotchas: Watch out!
Hi,
I don't fully understand what's going on here. I just doubled checked and
confirmed that both ospf and bgp use the same process to select router id's
so, unless the router id for ospf or bgp were changed manually they would be
the same. But, even assuming the router id was changed for one of the
protocols, why would that create a problem?
jim
----- Original Message -----
From: "Voss, David" <dvoss@heidrick.com>
To: <ray_gan74@hotmail.com>; <ccielab@groupstudy.com>
Sent: Thursday, March 13, 2003 1:18 PM
Subject: RE: CCIE Gotchas: Watch out!
> 1. BGP-->OSPF redistribution
>
> What = Routes not advertised to ibgp peers.
> Why? = Router ID's of ospf and bgp don't match.
> Solution: OR use route-reflector and make sure that redistribution occurs
on
> the route-reflector into the AS.
>
>
>
>
> .
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