Re: IRDP on Catalyst - New sort of Question Try this in your lab

From: Shaun Nicholson (Shaun.Nicholson@xxxxxx)
Date: Fri Sep 29 2000 - 19:43:24 GMT-3


   
Thats good but now make this work

                 R1 ------------- R2
                   | |
                 ISL ISL
                   | |
                  C1 ----ISL----C2

This will not work with HSRP or IRDP if the ISL trunk between C1 and C2 fail.
By not work I mean a client on C1 can not connect to a host on C2 in the same s
ubnet.
With HSRP both R1 and R2 become active so from C2 it goes to R2 and gets sent b
ack down to C2.

This is because the interfaces running HSRP or IRDP cannot see each others keep
 alives (this does not pass over the router link between R1 and R2).
Now finaly on to my question how do I make it work so that when the ISL trunk f
ails between C1 and C2 1.1.1.50/24 on C1 can ping 1.1.1.51/24 on C2.
You can however ping 2.2.2.50/24 on vlan 2 on C1 as its crossing subnets.

I know why it wont work I want to know how to make it work so no smart answers
please guy and girls.

Any takers
Thanks

Shaun

kbaumgar@cisco.com on 09/29/2000 06:00:00 PM
To: lter@rmconsulting.com@Internet
cc: ccielab@groupstudy.com@Internet (bcc: Shaun Nicholson/MD/KAIPERM)
Subject: Re: IRDP on Catalyst

Well not seeing the topology of the network I am guess here.
But it could be something like this.

         CAT ----------------------- R1
            |
            --------------------------- R2

Then configure two trunk ISL ports and configure ISL on R1 and R2.
Define trunk R1 with a lower priority (will be the priority trunk used)
than R2. So in this example clients that are connected on the CAT
will go to R1 first and if this trunk fails go to R2.

  Just a guess ....

Kevin

At 01:59 PM 9/29/00 -0700, you wrote:
>Hi.
>
>Is anybody know what is mean - "configure Catalyst so that client choose r1
>as primary gateway and r2 as seconday gateway"......
>I think that r1 and r2 configured for IRDP (with priority..) but what is
>about Catalist...
>The only I can guess - that you should do "set ip redirect enable" on
>catalyst...
>
>Any others guess?
>
>



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