From: Ronnie Angello (ronnie.angello@gmail.com)
Date: Tue Jun 12 2007 - 16:43:33 ART
BGP sync is disabled by default in 12.2(8)T and later.
On 6/12/07, Brian Dennis <bdennis@internetworkexpert.com> wrote:
>
> If BGP synchronization is enabled, there must be a match for the prefix in
> the IP routing table in order for an internal BGP (iBGP) path to be
> considered a valid path. BGP synchronization is enabled by default in
> Cisco
> IOS. Software. If the matching route is learned from an Open Shortest Path
> First (OSPF) neighbor, its OSPF router ID must match the BGP router ID of
> the iBGP neighbor. Most users prefer to disable synchronization with use
> of
> the no synchronization BGP subcommand.
>
> http://www.cisco.com/warp/public/459/25.shtml#background
>
> --
>
> Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
> bdennis@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 775-745-6404 (Outside the US and Canada)
>
>
>
>
> On 6/12/07 11:54 AM, "Filyurin, Yan" <yan.filyurin@eds.com> wrote:
>
> > Hello Group Study. I have heard of issue that occassionally happens
> > with mismatch of BGP router id and OSPF router id. From what I
> > understand based on some research it only happens when synchronization
> > is enabled and you peer either single hop or multihop. And I've heard
> > the problem is very famous and has been undoing of many CCIE candidates.
> > I've never ran into anything like that during my practice labs or in
> > real life, so was wondering if I could find out more.
> >
> > Thank you
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
-- Ronald Angello CCIE #17846
This archive was generated by hypermail 2.1.4 : Sun Jul 01 2007 - 17:24:48 ART