From: smaljure@xxxxxxxxxxxxxxxxx
Date: Fri Sep 29 2000 - 22:39:00 GMT-3
Hi Shaun
How about creating a tunnel int on R1 and R2. (This tunnel will use the
"other" link between R1 and R2.
R1's suninterface fa0/0.1 (VLAN 1) will only bridge...
Configure IRB and create BVI with 1.1.1.2/24.
So when the ISL between C1 and C2 is up, configure so the tunnel int
(bridging) is blocking
If the ISL between C1 and C2 goes down, then the tunnel should go into
forwarding...
Basically even on R2, u will need to bridge on fa0/0.1 and create a BVI with
IP address 1.1.1.3/24
Do HSRP between BVI on R1 and BVI on R2....( A relevant question here would
be when will the BVI go down? will it go down if int fa0/0.1 goes down?
Don't know the answer to this one)
Same logic for VLAN 2...fa0/0.2 should bridge..bvi2 on both routers should
route..another tunnel to bridge only vlan 2 traffic..
I have not tried this one. So I do not know if this will work. Let me know
what u guys think
Sanjay
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 subnet.
With HSRP both R1 and R2 become active so from C2 it goes to R2 and gets
sent back 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 fails 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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