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ASA VPN and QIP DHCP

Dave Henderson
on
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Last Modified: 2012-05-09
I have a Cisco ASA based VPN currently deployed in a customer data centre.  The project is an upgrade from a local VPN3000 Series Concentrator.  The final service will handle a lot more clients than the previous local one, so a scalable DHCP service is required for end clients.

The data centre is using Lucent QIP for DNS & DHCP Services which is working fine for other servers & services.

When my VPN client session is built, authentication is successful and a tunnel through the ASA to the DHCP Server is built.

In successive capture files using bi-directional access-lists placed strategically in the data centre, I see the DHCP request traffic reaching the VLAN that the QIP Server is on.  The QIP Server logs see the requests and -allegedly- respond.  But I never recieve the DHCP response.

Has anybody had the same issues?  Is there a known good fix for this?  I am also raising a TAC Case for this problem and will share any information I recieve - but would rather solve the issue here first!! :)

Cheers
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