Cisco asa 5520 Moving DHCP off of Firewall over to DHCP Server

[KEVIN MCCOY]

Hey Folks, were trying to move DHCP off of our Firewall right now over to our Server that is running DHCP. I take it that as long as we have identical scopes including the reserverations and changing lease times for our machines to get new DHCP leases, we shouldn't see any issues arise. Is there anything else to take into consideration before proceeding?

[balaji.bandi]

how is your helper address configured, that need to be pointed to new Server address.

[KEVIN MCCOY]

would i find the helper address on the ASA firewall?

[balaji.bandi]

As standard, ASA is connected to Switch, and switch have the configuration of IP helper, iam not sure about your case.

so if you can post configration we can able to suggest you. (you have any network topology- how they are connected new DHCP Server and users )

[mkazam001]

You would ip helper pointing to the DHCP Server either on the ASA or switches if they are Layer 3:

ASA(config)# dhcprelay server 10.1.1.1 outside
ASA(config)# dhcprelay enable inside

interface FastEthernet0/0
ip helper-address 10.1.1.1

Hope that helps!

Azam

[johnlloyd_13]

hi,

could you post a show run dhcpd?

the DHCP server config on the ASA is pretty straightforward. just make sure the client machines can ping/reach the new DHCP server.

issue a no dhcpd enable <INTERFACE> for each scope/subnet and do a test.