From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Fri Jan 05 2001 - 11:35:31 GMT-3
Curtis,
a rule of thumb that I have heard is that for OSPF loopbacks are good to
keep the RID stable and you can
choose to make the loopbacks routable if you wish to use them for
IBGP. To determine this, are there multiple paths between your IBGP
neighbors? If yes - make loopback routable and use that
as your neighbor address. If no - use the physical interface, because if
the physical interface goes away so does your path to the IBGP
neighbor.
Julie Ann
At 09:22 AM 1/5/2001 -0500, Curtis Phillips wrote:
>Hello,
>
>I was thinking about a loopback addressing atategy for the lab and wondered
>whether others had developed a specific plan. I consider loopbacks essential
>for OPSF adjacency development, BGP internal peering sessions,and probably for
>the introduction of network segments into the configuration.
>
>I think it would be nice to create loopbacks that identify the router of
>origin, For example 1.1.1.1 for router 1, 2.2.2.2 for router 2 etc.
>
>As any OSPF RIDs would be altered by addition of higher numbered loopback
>addresses, is there a strategy the anticipates this?
>
>Although real-world practice may be to use loopbacks to source BGP updates for
>IBGP, does anyone see any problems with using physical interfaces in the lab
>environment?
>
>Anything else I am missing here?
>
>Thanks,
>
>Curtis
>
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