Thursday, May 14, 2015

Avaya DHCP Settings Option 242 Server 2012

q: The customer called about new Avaya phones that will only display “Waiting for LLDP” which apparently means they cannot lease an IP from the DHCP server.

a: It was directed to us to add the following setting using the IP of the IP Office Avaya server but their new Windows Server 2012 DHCP Server didn't have that option.  The following details how to add it. Part One describes how to Create the Option, Part two describes how to assign it a value and enable it.

242 16xxOptions MCIPADD=192.168.1.10,MCPORT=1719,HTTPSERVER=192.168.1.10

NOTE: This assumes you're using the same VLAN for voice and data.


  1. Open DHCP / Expand DHCP Server
  2. Right click on IPv4
  3. Click "Set Predefined Options"
  4. Click Add
  5. Use these values for the Option Type:
  6. Click OK to Create the Option.
  7. With the new Option Name selected, enter the Avaya String: MCIPADD=192.168.1.10,MCPORT=1719,HTTPSERVER=192.168.1.10
  8. Click OK
  9. Expand IPv4
  10. Expand Scope
  11. Right click on "Scope Options"
  12. Click "Configure Options"
  13. Scroll to the bottom and check/enable your new 242 option (The value should be pre-populated from step 10.
  14. Click OK
  15. Then reboot your phones to test.