# Configuring the switch call server IP address TLV

Use this procedure to define the local call server IP addresses that switch ports can advertise to Avaya IP phones.

You can define IP addresses for a maximum of 8 local call servers.

| Important
| The switch does not support the advertisement of IPv6 addresses to Avaya IP phones.

## Procedure steps

1. From the navigation tree, double-click Edit.

2. In the Edit tree, click Diagnostics.

3. In the Diagnostics tree, click 802.1AB.

4. In the 802.1AB tree, click Avaya.

5. In the Avaya work area, click the Local Call Servers tab.

6. Click CallServerNum to select a port.

7. In the port row, configure as required.

8. On the toolbar, click Apply.

## Variable definitions

The following table describes the variables associated with the Local Call Servers tab.

Variable | Value
--- | ---
CallServerNum | Displays the call server number.
CallServerAddressType | Displays the call server IP address type.
CallServerAddress | Defines the local call server IP address to advertise.