Avaya DHCP Option 242 & 176

Getting your Avaya phones to auto VLAN in the correct DHCP scope isn't complicated below are 2 strings per DHCP scope you will need.  In this example I have used a cisco switch as the DHCP server.

The first configuration shows the User network where the phones will initially boot into.  The phones will pick up either option 176 or 242 depending the model,  the first option L2Q=1 tells to phone to use 802.1q tagging, the second option L2QVLAN=11 tells the phone to reboot into vlan 11, the last option VLANTEST=0 is to turn off VLAN Testing (not really sure what on would do).

!
interface vlan 10
Desc USER NETWORK
ip address 10.10.10.1 255.255.255.128
no shut
ip ospf 1 area 10
!

ip dhcp pool USER NETWORK
   network 10.10.10.0 255.255.255.128
   default-router 10.10.10.1
   dns-server 10.10.10.12 
   option 176 ascii L2QVLAN=11
   option 242 ascii L2QVLAN=11
!

The next Scope will be defined for your Avaya handsets

!

int vlan 11

Desc VOICE NETWORK

ip address 10.10.10.129 255.255.255.128

no shut

ip ospf 1 area 10

!

ip dhcp pool VOICE NETWORK

   network 10.10.10.128 255.255.255.128

   default-router 10.10.10.129

   dns-server 10.10.10.12

   option 176 ascii MCIPADD=10.10.20.131,10.10.30.131,MCPORT=1719,HTTPDIR=/SITE1/96xx/,HTTPSRVR=10.10.40.131

   option 242 ascii MCIPADD=10.10.20.131,10.10.30.131,MCPORT=1719,HTTPDIR=/SITE1/96xx/,HTTPSRVR=10.10.40.131

!