From: Geert Nijs (geert.nijs@simac.be)
Date: Fri Jun 11 2004 - 09:12:09 GMT-3
Yep. Inter-SUB-AS links are considered "external", so you'll need multihop to link sub-ASs if you use loopbacks...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
tycampbell@comcast.net
Sent: vrijdag 11 juni 2004 13:36
To: ccielab@groupstudy.com
Subject: BGP Confederation peering question
When do a confederation, and all the neighbor peering is done with loopbacks, if the sub-AS is different, should you use ebgp-multihop ? I know that it is not done for routers in the same AS, but was wondering if it was needed within the confederation also, for a sub-AS
for example..
r1
int loop0
ip add 10.2.2.2 255.255.255.255
router bgp 65234
bgp confed id 400
bgp confed peer 65321
nei 10.1.1.1 remote 65321
nei 10.1.1.1 update-source loop0
nei 10.1.1.1 ebgp-mutlihop 2
r2
int loop0
ip add 10.1.1.1 255.255.255.255
router bgp 65321
bgp confed id 400
bgp confed peer 65234
nei 10.2.2.2 remote 65234
nei 10.2.2.2 update-source loop0
nei 10.2.2.2 ebgp-multihop 2
Thanks!
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