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Cisco UC540 - Remote phone registration - L2L IPsec VPN

Posted on 2013-12-06
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Last Modified: 2013-12-19
I have a client that would like to have a system phone at her home office. At her home there is an ASA with an L2L IPSec tunnel configured to the office where the UC540 is located. The UC540 is located at 192.168.1.254 on the remote network so I made sure the phone can ping that address. I've also noticed that the UC540 has other interfaces that I suspect need to be available to the remote phone. Specifically it has 10.12.13.1, 10.1.10.2. I've made sure to allow all of these addresses available to the remote network but the phone doesn't seem to register. It is a 7962. I figure if it can see the UC540, it should be able to register just as a phone on the local network would. Is this correct? What would I need to do to the phone / VPN to allow this to function?

Thanks!
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Question by:farroar
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Expert Comment

by:agonza07
ID: 39702404
Did you configure the TFTP server on the remote phone?
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Author Comment

by:farroar
ID: 39702419
No I did not. I can't seem to find the location where that is specified. I see an option for "Unified CM Configuration" and under that menu "Unified CM 1" there is an IP set of 10.12.13.1 but no editable fields and no mention of TFTP settings. Where should I look?
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Author Comment

by:farroar
ID: 39702458
Check my last. I found the TFTP server settings on the phone. It is currently set at 192.168.1.254 which is the IP address of the UC540. I do not have the option to edit it however, but I believe that to be the correct address. Should I factory reset the phone?
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Accepted Solution

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agonza07 earned 500 total points
ID: 39702553
Does the phone register properly at the main office?
Btw, Here's how you set the TFTP manually.
http://helpdesk.pressone.net/index.php?pg=kb.page&id=34

On the UC540 turn on TFTP debugging and see if you see the phone hitting the router.
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Author Closing Comment

by:farroar
ID: 39729468
This wasn't my issue, but it was good to know. Turned out to be a routing issue.
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