From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Tue Feb 01 2005 - 18:10:35 GMT-3
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
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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
> >
> >
This archive was generated by hypermail 2.1.4 : Thu Mar 03 2005 - 08:51:15 GMT-3