From: Daniel Sheedy (dansheedy@gmail.com)
Date: Fri Mar 11 2005 - 17:35:06 GMT-3
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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