From: Wade Edwards (wade.edwards@powerupnetworks.com)
Date: Wed Oct 16 2002 - 17:37:34 GMT-3
If you are using IBGP between the neighbors then you don't need to use
the multihop option. I know that in the past I have had to do the
multihop parameter to get the EBGP neighbors to form if it is from
loopback to loopback.
-----Original Message-----
From: Paglia, John (USPC.PCT.Hopewell) [mailto:JPaglia@NA2.US.ML.com]
Sent: Wednesday, October 16, 2002 3:01 PM
To: 'ccielab@groupstudy.com'
Subject: EBGP Multihop's necessity with loopback addresses
I recently heard that if you are establishing your BGP neighbors using
'update source loopback 0', you should also use the 'ebgp-mu' cmd, even
if
the neighbors are directly connected...the reason being that your
loopback
is NOT directly connected to the neighbor. However, in my experiments I
have
never done this for neighbors that are directly connected, yet have
established peerings successfully.
Is there validity to this statement, and if so, under which
circumstances is
it absolutely vital, other than the 'non-physically or nbma topology'
scenarios??? Something tells me that this may be an older IOS issue or
something like that.
John
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