From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sat Oct 21 2006 - 13:49:57 ART
If you are referring to the CCIE lab then there aren't any rules. If they ask you to make them passive then do. If they don't ask then don't make them passive.
In the real world if you don't want to waste CPU cycles you can make any interface that will not have a "neighbor" passive (i.e loopback).
HTH,
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Laurent Dupraz
Sent: Saturday, October 21, 2006 12:58 AM
To: ccielab@groupstudy.com
Subject: Passive-interface for loopback0
Dear all,
what are the rules concerning loopback 0 passive-interface:
for example:
OSPF:
int loopback0
ip add x.x.x.x x.x.x.x
!
router ospf 1
net ...
passive-interface loopback0
! ================================= I think not needed
RIP
int loopback0
ip add x.x.x.x x.x.x.x
!
router RIP
net ...
passive-interface loopback0
! ================================= I think needed
EIGRP
int loopback0
ip add x.x.x.x x.x.x.x
!
router EIGRP 1
net ...
passive-interface loopback0
! ================================= I think needed
Thanks for your support
Laurent
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