CSS Multiple IP Addresses to interface

Unanswered Question
Jun 28th, 2007

Can you have more than one IP Address on an interface?

If so, how do you configure this?

I have this problem too.
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Gilles Dufour Fri, 06/29/2007 - 03:41

circuit VLAN30

ip address 192.168.30.120 255.255.255.0

ip virtual-router 7 priority 110 preempt

ip redundant-interface 7 192.168.30.204

ip critical-service 7 upstream

ip address 192.168.31.120 255.255.255.0

wilson_1234_2 Fri, 06/29/2007 - 04:27

Thanks for the reply.

i am not sure I understand the config here,

The two IP Addresses of the interface 192.168.30.120

192.168.31.120

The rest (reference 7)is pointing to a redundant interface?

My situation is that I have the CSS ip Address in the DR subnet and I have my services and VIPs in the HQ subnet.

I have it working with two interfaces at the moment, but was wondering how to config it with a single interface.

I tried to set up trunking on a single interface, but could not get it to wotk with an old 2900 cat switch I have.

skumar1969 Sun, 07/01/2007 - 20:39

Just type your new ip address under the circuit VLAN. See below. It will accept the second ip address as well. I never used these sort of assignments in production deployments. I presume it would be similar to putting a secondary ip address on the router interface. Tell us how it works for you.

circuit VLAN790

description "client Segment"

ip address 192.168.196.134 255.255.255.192

ip address 193.168.196.134 255.255.255.192

thanks

Gilles Dufour Mon, 07/02/2007 - 00:07

ok, so what you want actually is to configure trunking.

There is not much to do there, just use the command trunk [the CSS can only do dot1Q] and select the default vlan with the command 'default' inside your vlan.

once trunking will be working, you can configure an ip inside each vlan.

Gilles.

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