From: Pat Chui (cui666@gmail.com)
Date: Fri Mar 11 2005 - 18:14:37 GMT-3
Daniel,
Thanks, I understood the technical aspect of my question.
I guess if I asked the questions in another way: would you use some
common practices like using LP as iBGP neighbor id's whenever
applicable? most people would say "no" per KISS rule. one can
optimize the network they build in the lab, but without points reward,
it would be worthless effort.
Pat
On Fri, 11 Mar 2005 21:35:06 +0100, Daniel Sheedy <dansheedy@gmail.com> wrote:
> Hi Pat,
>
> Rather than asking how, I think the question better asked here is... why?
>
> Why would we want to use a loopback address to peer with? Basically, to
> provide an IP address that won't change, even if the path to the router does
> change. ie.. Serial line collapses, but the ISDN suddenly pops up.
> Therefore, the peering starts again, over the new path.
>
> So, instead of rushing off and using loopbacks all the time, ask the simple
> question...
> If the link goes down, that BGP is established over, is there another route
> going to be available? If not.. then there is no point to setting up
> peering with loopbacks.
> If another route will be available, then you will need to pick an IP address
> that will aways be available, like the loopback IP addresses. Then we have
> to make sure that the loopbacks are known to the other side as well... but
> thats another story.
>
> hth
>
> Dan Sheedy
>
> ----- Original Message -----
> From: "Pat Chui" <cui666@gmail.com>
> To: <ccielab@groupstudy.com>
> Sent: Friday, March 11, 2005 8:12 PM
> Subject: Re: Encryption and QOS
>
> > Hi, Group
> >
> > Do you define a loopback for iBGP sessions? it's a common practice in
> > production networks, but in ccie lab, is it worthwhile to configure
> > the loopback for the purpose? and if not, do you just randomly pickup
> > ip addresses on the neighbor routers?
> >
> > TIA
> > Pat
> >
> > _______________________________________________________________________
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