Unity Express with VLANs

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Mar 10th, 2008
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I am trying to design a solution with CCM 6.O on 7815 machine. Voice mail requirement is very small number, and I am trying to use Unity Express here.

I have a complicated LAN with lot of VLANs.

Is there any problem to install Unity Express on multi-VLAN environment ?

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Overall Rating: 4.5 (2 ratings)
Brandon Buffin Mon, 03/10/2008 - 06:42
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No, there is no problem with this. You will just need to be sure that you can route between VLANs where necessary.


nkariyawasam Mon, 03/10/2008 - 21:08
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Hi Brandon,

Thanks for the ansewr. The reason why I ask this quesiton is that, when refering to the document "Cisco Unified Communications SRND Based on Cisco Unified Communications Manager 6.x" on CCO link:


On Unity Express chapter it says;

"Best Practices for Deploying Cisco Unity Express -

Ensure that the IP phones having Cisco Unity Express as their voicemail destination are located on the same LAN segment as the router hosting Cisco Unity Express. "

I am hust trying to wee whether this is an essential requirement and if we do not meet the requiremnt, what kind of issues will be there.


Brandon Buffin Tue, 03/11/2008 - 05:43
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It is a best practice to have your phones and CUE in the same VLAN. In my mind, there would have to be a very compelling reason to deviate from this. That being said, I believe the statement indicating the the phones and CUE must be located on the same LAN segment is referring to the fact that having subscriber phones separated from CUE by a WAN link is unsupported as mentioned in the following link. I don't believe this is referring to separation by VLAN.


Hope this helps.



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