From: Bajo (bajoalex@gmail.com)
Date: Tue Feb 01 2005 - 18:19:36 GMT-3
Thanks Brian for clarifying.
JD must be talking about the RID auto selection process which,
apparently, one can override by using the router-id command.
On Tue, 1 Feb 2005 16:10:35 -0500, Brian McGahan
<bmcgahan@internetworkexpert.com> wrote:
> The router-id does not have to be based off of an IP address assigned to
> the router. See the below output:
>
> Rack1R5#show ip bgp | in router ID
> BGP table version is 14, local router ID is 150.1.5.5
> Rack1R5#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Rack1R5(config)#router bgp 100
> Rack1R5(config-router)#bgp router-id 1.2.3.4
> Rack1R5(config-router)#end
> Rack1R5#
> Rack1R5#show ip bgp | in router ID
> BGP table version is 1, local router ID is 1.2.3.4
> Rack1R5#show ip int brief | in 1.2.3.4
> Rack1R5#
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Bajo
> > Sent: Tuesday, February 01, 2005 2:49 PM
> > To: Jonathan ZD
> > Cc: CCIE - GS
> > Subject: Re: BGP Router-ID
> >
> > Jonathan it will be valid only if
> >
> > a) either the address is a loopback interface or
> > b) a physical interface address.
> >
> > The interface does NOT need to be running BGP.
> >
> > Take a look at Jeff Doyle's Routing TCP/IP Vll, page 154.
> >
> >
> > On Tue, 1 Feb 2005 12:03:22 -0800, Jonathan ZD <Nuvo25@hotmail.com>
> wrote:
> > > Is it neccessary that BGP Router-ID has to be reachable by its BGP-
> > peers. For
> > > example, if the following configuration valid?
> > >
> > > Rtr 01
> > >
> > > router bgp 100
> > > bgp router-id 1.1.1.1
> > > nei 192.168.21.2 remot 100
> > >
> > > ---------
> > >
> > > Rtr 02
> > >
> > > router bgp 100
> > > bgp router-id 2.2.2.2
> > > nei 192.168.21.1 remot 100
> > >
> > > *** The router-id (1.1.1.1 and 2.2.2.2), in this case, is not
> reachable
> > by IGP
> > > between both routers.
> > >
> > > ----------
> > >
> > > Thanks
> > >
> > >
> _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> > >
> >
> >
> > --
> > Regards,
> >
> > Bajo
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
-- Regards,Bajo
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