From: Ron Royston (ccie6824@xxxxxxxxxxx)
Date: Wed Aug 08 2001 - 11:54:42 GMT-3
Yes.
If you have:
IGRP OSPF
R1-------R2-------R3
Lo0 Lo0
1.1.1.1/24 2.2.2.2/24
Routing decisions are prioritized and longest prefix match is chosen before
admin distance, right? You will not be able to get a routing loop here
unless you disable split horizon, mutually redistribute OSPF/IGRP, and have
the prefix lengths the same for OSPF and IGRP. You may need to use the
"area range" command. I did this a while back and this is what I got. (I'm
using IGRP because RIP is higher in admin weight than OSPF). See the route
to 40.0.0.0?:
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
10.0.0.0/24 is subnetted, 1 subnets
C 10.2.2.0 is directly connected, Ethernet1
I 30.0.0.0/8 [100/1600] via 50.0.0.1, 00:00:11, Ethernet0
I 40.0.0.0/8 is possibly down, routing via 50.0.0.1, Ethernet0
C 50.0.0.0/8 is directly connected, Ethernet0
Router#
>From: "Rick Foltz" <ccie2b@rfoltz.com>
>Reply-To: "Rick Foltz" <ccie2b@rfoltz.com>
>To: <ccielab@groupstudy.com>
>Subject: routing loop scenerio
>Date: Wed, 8 Aug 2001 08:17:23 -0500
>
>does anyone have a good example of a scenerio where a routing loop will
>form
>using 3 or 4 routers, and without messing with default timers and AD.
>
>
>Richard Foltz, CCNP-Voice, CCDP, MCSE+I, Network+, A+
>Project Team Leader, Network Services
>Smith Datacom
>713-430-2184
>3rd Attempt in RTP 11/2 and/or 3rd (CCIE with a * I Guess)
>**Please read:http://www.groupstudy.com/list/posting.html
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