From: ccie1101 (ccie1101@gmail.com)
Date: Tue Oct 09 2007 - 09:36:28 ART
Hi Grace,
Yes, your understanding is correct. Since we only want one interface
on R2 to participate in RIP, therefore that particular interface will be
active and the others are passive as with the 'passive-interface default'
command.
As for split-horizon, it is turned off when we do a encapsulation
frame-relay on the router. Therefore, I turned on split-horizon since I need
this serial interface to send and receive updates on this serial interface.
The connection for this network is R2 --- serial interface --- R1.
It really buffles me, anyone care to explain this ? Argggghhh ... or
am i missing something here .....
Thanks in advance,
Cheers,
- ccie1101.
On 10/9/07, Grace Simon <SimonG@pcsystems.gr> wrote:
>
> 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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