HOWTO: Configure Windows DHCP for Avaya IP telephones
In this example we will configure Windows DHCP for Avaya IP telephones. In addition to your standard Option 003 Router you will also need a custom scope option in order for an Avaya IP phone to boot properly using DHCP. While I do reference the IP Office in this document the content is not specific to the IP Office. Options 176 and 242 are common to all Avaya IP telephones and this method would work equally well for phones connected back the an Avaya Communication Manager (aka ACM or CM)
1. Open the DHCP MMC under Control Panel>Administrative Tools>DHCP
2. Right click on the DHCP server name at the top of the tree on the left side of the screen immediately under “DHCP” and select “Set Predefined Options”.
3. Click on the [Add] button.
4. (Avaya 4600 & 5600 series IP phones) Under Name enter “Avaya Option 176” and select a Data type of “String” and a Code of “176” then click [OK].
5. (Avaya 1600 series IP phones) Repeat step 4 above to add option 242. Under Name enter “Avaya Option 242” and select a Data Type of “String” and a Code of “242” then click [OK].
From this point on things will change if you are using a single VLAN for both Voice and Data or two separate VLANs. I will cover both.
We will assume your IP Office is using the default IP address of 192.168.42.1 (modify to match your IP Office’s actual IP address).
********** If using only a single VLAN for both Voice and Data ********** 1. Expand our your DHCP scope and right click “Scope Options” and select “Configure Options”
2. Scroll down and locate option(s) 176 and/or 242. Under “String value” enter the following:
| Option 176 | MCIPADD=192.168.42.1,MCPORT=1719,TFTPSRVR=192.168.42.1 |
| Option 242 | MCIPADD=192.168.42.1,MCPORT=1719,HTTPSRVR=192.168.42.1 |
********** If using a separate VLAN for Voice and Data (we will use “11” for the Voice VLAN tag in this example) ********** 1. Expand out your DATA DHCP Scope and right click on “Scope Options” and select “Configure Options”
2. Scroll down and locate option(s) 176 and/or 242. Under “String value” enter the following:
| Both Option 176 & 242 | L2Q=1,L2QVLAN=11,VLANTEST=0 |
3. Expand out your VOICE DHCP Scope and right click on “Scope Options” select “Configure Options”
2. Scroll down and locate option(s) 176 and/or 242. Under “String value” enter the following:
| Option 176 | MCIPADD=192.168.42.1,MCPORT=1719,TFTPSRVR=192.168.42.1,VLANTEST=0 |
| Option 242 | MCIPADD=192.168.42.1,MCPORT=1719,HTTPSRVR=192.168.42.1,VLANTEST=0 |
(NOTE: There are many other values that can be entered under your option 176 and option 242 such as L2QAUD and L2QSIG but those can just as easily be set in your 46xxsettings.txt file)
The final step is to configure the IP Office to handle the TFTP/HTTP requests. Your best option is to use a standard Compact Flash card inserted into the Embedded Voicemail slot or the Embedded Voicemail Card itself to hold your .bin, .txt and .scr files. The alternative is to use Manager or some other TFTP/HTTP server running on a PC to serve up the needed files. Here are examples of both
When using a Compact Flash card or Embedded Voicemail card to hold the files internal to the IP Office Set the “TFTP Server IP Address” and the “HTTP Server IP Address” to the IP Office’s own IP address. This will tell the unit to look to itself to handle all file requests.
When using an external TFTP server such as IP Office Manager Set the “TFTP Server IP Address” to the IP Address of the PC running Manager but leave the HTTP address blank. The IP Office will relay all incoming TFTP requests and proxy all incoming HTTP requests as TFTP. This eliminates the need to setup both a TFTP and HTTP server on the target PC.