DHCP binding for vendor specific

[Jeff Horton]

This may not be configurable but I had to ask in order to correctly answer someone's question...

I have a pool of ip addresses in a DHCP pool.. I want to reserve a portion of them for a vendor specific hardware address.. Can this be done on Cisco switch?

Pool is 192.168.1.0 255.255.255.0

reserved needed is 192.168.1.120 - 150 for vendor specific hardware address..

What they are needing to do is be able to change out a bad device with a good device and only retrieve an address from the reserved pool.. Trying to keep ip addresses specific to certain devices on the LAN...

Thanks in advance...

Jeff

[Leo Laohoo]

You mean DHCP reservation?

[Jeff Horton]

Not sure how exactly to do this.. would reservation be best?

Jeff

[Leo Laohoo]

If you want it simple, yes.

[Jeff Horton]

Then reservation it is.. How do I configure the DHCP to recognize the vendor portion of the hardware address to give it a certain range of addresses within a subnet?

[Leo Laohoo]

You will need to enter the complete MAC address to the assigned IP address.

[Jeff Horton]

I understand that portion of my question but how do you configure dhcp to recognize the vendor portion of the MAC only?

[Martin Carr]

You have to configure the reservations (i.e. IP to MAC) it does nothing to 'recognise' OUI.

If you want addresses to be dynamically issued to them, you need to look toward the aforementioned client-identifier.

Martin

[Jeff Horton]

Have you used client-identifier for this before?

[Leo Laohoo · Accepted solution]

You could try DHCP Option 60. DHCP Option 60 is the Vendor Class Identifier (VCI). The VCI is a text string that uniquely identifies a type of vendor device.

[Jeff Horton]

Does the IE 3000 or IE 4000 support dhcp option 60? Having trouble with the correct configuration..

[Leo Laohoo]

IT should but I haven't tried it.