alias vlan interfaces on the ACE

Unanswered Question
Jul 10th, 2009

I am getting up to speed the ACE module and seeing lots of cases where an alias is configured on both, the client and server side vlan interfaces. Is this a requirement?

Thanks..

I have this problem too.
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axfalk Fri, 07/10/2009 - 13:28

Thnx for your response. I can see how the alias concept would come in to play when configuring a fault tolerant vlan as part of the redundancy. Is it also commonly used for a vlan int on the ACE?

Thanks again

dario.didio Sun, 07/12/2009 - 23:16

Hi,

Yes it is. If you have a pair of ACEs in routed mode, you should use aliases on your VLAN interfaces.

This VLAN address should then be used by your servers as default-gateway on the server side, and as next-hop for you upstream routers on client-side.

This way, if the primary ACE fails, the next-hop address and default-gateway of your upstream routers and servers don't have to be changed because the IP Address remains the same.

Take a look at following doc for configuration guidelines: http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/v3.00_A1/configuration/rtg_brdg/guide/vlansif.html#wp1034811

HTH,

Dario

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