From: Grace Simon (SimonG@pcsystems.gr)
Date: Mon Oct 08 2007 - 16:04:21 ART
My understanding is passive interface just stops it sending updates out
of those interfaces.
By configuring network 7.0.0.0
You are telling the RIP process what networks to include in the updates.
Split Horizon is stopping it from advertising a route that it learnt via
that interface. If this router is a hub with two or more spokes then by
disabling the split horizon you allow the routes to be passed from one
spoke to the other.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie1101
Sent: Monday, October 08, 2007 8:31 PM
To: Cisco certification
Subject: Re: RIP Question across FR ......
Hi GS,
I have a RIP scenario here which is as follows . Here is my
configuration :-
R2
-- router rip version 2 passive-interface default no passive-interface Serial0/1/0 network 7.0.0.0 no auto-summary ! ! int s0/0/0 no ip split-horizon------------------------------------------------------------ R2#sh ip rip data 7.0.0.0/8 auto-summary 7.7.1.0/24 [1] via 7.7.13.1, 00:00:16, Serial0/1/0 7.7.3.0/24 directly connected, Loopback0 7.7.13.0/24 directly connected, Serial0/1/0 7.7.30.0/24 directly connected, FastEthernet0/1 7.7.35.0/24 directly connected, FastEthernet0/0 7.7.100.0/24 directly connected, Serial0/0/0 ! ------------------------------------------------------------
Now when I do a 'sh ip route rip' on the other end of the frame-relay link, I still see these networks that is connected to R2 even though all those interfaces are in passive-interface mode ....
R1(config)#do sir rip 7.0.0.0/24 is subnetted, 6 subnets R 7.7.0.0 [120/1] via 7.7.13.3, 00:00:15, Serial0/0/0 R 7.7.40.0 [120/1] via 7.7.13.3, 00:00:15, Serial0/0/0 R 7.7.45.0 [120/1] via 7.7.13.3, 00:00:15, Serial0/0/0 R 7.7.150.0 [120/1] via 7.7.13.3, 00:00:15, Serial0/0/0
(1) Can someone explain if I am missing something here ? (2) Since this connection is across the frame-relay link, I have turned on split-horizon as the default mode for split-horizon is turned off when we use the command 'encap frame-relay' ....
Thanks in advance,
Cheers,
ccie1101.
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