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AnyConnect Clients - DHCP and DDNS - InfoBlox

Hi All, 


We are working on deploying AnyConnect as our new VPN client.  We are using ASA 5545x's.  

Currently, the clients are using a pre-set address pool created from (separated in 16 groups to make it manageable).


Our old VPN setup used statically assigned IPs that resolved to the machine's hostname (  Our current AnyConnect/ASA combo is not resolving and we are having some trouble getting it set up.  Here is what we want to accomplish:


1.  AnyConnect client connects - requests DHCP address from our DHCP server (Infoblox cluster).

2.  DHCP address is assigned to client.  DNS resolves this address to the hostname of the machine (   

3.  DNS updates dynamically, so if the host address changes, DNS is updated accordingly.  


Everything works fine from a connection standpoint with the address pools, but DHCP and host names do not currently resolve.  I've looked into setting up a DHCP relay on the ASA.  Is that the right approach?  If using a relay, do we need to set up a dedicated interface to pass those requests?  Right now, we have two interfaces set up - an internal and an external.  I don't think the relay is working properly because I think the traffic needs to pass from the internal interface (where the clients are sitting once connected) to another interface set up specifically for a relay.  Am I incorrect in this assumption?  


This is my first time setting this up, so any input is appreciated!


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