Static DHCP IP to Mac-address reservation


I want to be able to supply static IP's to MAC's in an office, but the ASA Firewall cannot do this. There are no onsite servers doing DHCP leasing and everything is done from the ASA Firewall. However for MAC updates, we cannot run updates when the IP addresses change.

What are the best options available to me to have static IP reservations, is there a router or device that can replace the firewall and have static reservations?

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Nick RhodeIT DirectorCommented:
Since it is not supported, nor do you have a DHCP server involved. Why don't you manually assign the addresses?  Shorten your scope of the DHCP server and leave a block of addresses out of DHCP range.

Example.  DHCP is -
Change the scope to -

Addresses - will be excluded from DHCP range so you can use those to assign as statics.

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Nick, could he dynamically assign the addresses, then create a pool which excluded that range?  Or would the clients' leases eventually expire having detected no manual entry?
e-itregisterAuthor Commented:
So even though we cannot do static reservations on the firewall, adding them manually on each MAC, it would still work cause it would be within the scope, correct?
Yes, that's correct.
But, as Nick said you need to exclude static range from DHCP, and since those IP addresses are in the same network range everything will work.
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