Avaya Application Solutions Deployment Manual page 298

Network design
Before installing each DHCP server, obtain the following required network information:
Gateway/router IP addresses
TFTP server IP addresses
Subnet mask
Media controller (C-LAN circuit pack) IP addresses
Media controller (C-LAN circuit pack) port
TFTP server path
Telephone IP address range
- From:
- To:
DNS server addresses
The TFTP server file path is the "root" directory that is used for all transfers by the server. This is
the default directory which all files will be uploaded to, or downloaded from. In configurations
where the upgrade script and the application files are in the default directory, TFTP server path
should not be used.
Avaya can use a special option, Option 176, to pass these values. Avaya has done significant
testing of and had good success with Option 176 on the Microsoft Windows 2000 DHCP server
and the ISC DHCP server (common on Linux and Unix platforms). Results from other DHCP
servers may vary. A typical Option 176 string looks like the following string:
"MCIPADD=#.#.#.#,MCPORT=1719,TFTPSRVR=#.#.#.#,L2Q=1,L2QVLAN=0"
where
MCIPADD is the IP address of the C-LAN
MCPORT is the UDP port that is used for telephone registration
TFTPSRVR is the TFTP server that the telephone uses to look for firmware and
configuration upgrades
L2Q is 802.1Q. 1 is on, 0 is off
L2QVLAN is the VLAN that the telephone uses. Vlan ID 0 is a special vlan ID that tells the
next Layer 2 switch to replace the 0 tag with the native vlan ID on that ingress port.
See DHCP / TFTP
298 Avaya Application Solutions IP Telephony Deployment Guide
for more information.