Technical Tip: Configuring DHCP Options for Avaya IP Phones

[FortiKoala]

Description

This article describes configuring DHCP Options for Avaya IP Phones.

Scope

FortiNAC.

Solution

The network contains Avaya IP phones that may not have PCs connected to them.
There is a need to assign a voice VLAN and tag the VLAN over 802.1Q.

Although these values can be assigned by programming them directly to the Avaya IP phone, it can also be done automatically using DHCP options.  Network Sentry's DHCP server can be configured to assign these values. When the phone connects to a network where Network Sentry acts as the DHCP server (such as a Registration VLAN), Network Sentry will provide these configurations.

Requirements:
Admin access to the Campus Manager CLI.
Avaya 4621/4602 IP phones.
Avaya 3800 IP phones.

Important: Once dhcpd.conf is customized, Configuration Wizard can no longer be used to add DHCP scopes. The next time ConfigWizard is run, the edits will be overwritten.  Therefore, if needing to re-run ConfigWizard to change other configurations (ip, static routes, etc), be sure to back up the dhcpd.conf first, then replace once ConfigWizard is run.

Procedure:

1. Access Network Sentry Server/Application Server CLI.
2. Type config <enter> to navigate to /bsc/siteConfiguration directory.
3. Make a backup copy of the dhcpd.conf file.
4. Stop the DHCP service:
   
   service dhcpd stop
   
   
5. Make the following edits using VI to the /bsc/siteConfiguration/dhcpd.conf file at the top of the DHCP file place the following lines:
   
    *  option AVAYA176 code 176 = text;
    *  option AVAYA242 code 242 = text;
   
   At the bottom of the registration scope place the following lines:
   
    * option AVAYA176 "MCIPADD=10.2.241.5,MCPORT=1719,TFTPDIR=/avaya/IPT46_R9.033b/,TFTPSRVR=10.0.10.108,L2Q=1,L2QVLAN=241,VLANTEST=60";
    * option AVAYA242 "MCIPADD=10.2.241.5,MCPORT=1719,TFTPDIR=/avaya/IPT46_R9.033b/,TFTPSRVR=10.0.10.108,L2Q=1,L2QVLAN=241,VLANTEST=60";
   
   
6. Save the configuration changes.
7. Start the DHCP service.

service dhcpd start

Explanation of commands:

option AVAYA176 code 176 = text; --> Enables option commands for Avaya 4621 and 4602 IP Phones.

option AVAYA242 code 242 = text;  --> Enables option commands for Avaya 3800 IP Phones.

TFTPDIR=/avaya/IPT46_R9.033b/  --> TFTP directory where the IP phones get information.

TFTPSRVR=10.0.10.108  -->TFTP Server IP address.

L2Q=1  --> Enable Q tag.

L2QVLAN=241  --> Assign VLAN 241 to the IP phone.

VLANTEST=60  --> Test the VLAN for 60 seconds upon bootup.