The Unique client Identifier is not valid

Question

_{Saturday, June 25, 2011 5:52 PM}

I have DHCP running on a server 2008 R2 SP1.  I havea the scope created fine and it is releasing IPs.  However, I am trying to create reservations and  having trouble.  I give the reservation a name say "PeckmanCxP" and its reserved IP address. I put nothing in for MAC or description and for supported types a choose DHCP. When I click on ADD I get the message "The unique client identifier is not valid"  what am I doing wrong????

All replies (2)

_{Tuesday, June 28, 2011 8:21 AM ✅Answered}

Hi dvua,

Thanks for posting here.

> I put nothing in for MAC or description and for supported types a choose DHCP.

System will not accept a reservation record without MAC address entry, so you may have to full this entry or will not able to properly add this record .

Creating Reservations

http://technet.microsoft.com/en-us/library/cc779507(WS.10).aspx

Thanks.

Tiger Li

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_{Monday, June 27, 2011 6:33 AM}

Have you tried adding a exclusion in your DHCP server ?Guowen Su | CCNA, CCIP, MCP, MCSA, MCSE, MCTS, MCITP, CEH | http://www.microsoft.com/en/sg/default.aspx Our Goal? VERY SATISFIED Customers. If you're not...let's talk!! Please don't vote me for answers... because i do not want others to feels that i'm cheating ? :) In any case God knows :)