# Configuring source interface

## About this task

Use the following procedure to set a loopback interface IP as source IP address for a specific application.

## Procedure

1. From the navigation tree, double-click IP.
2. In the IP tree, click IP.
3. In the work area, click the Source Interface tab.
4. In the table, double-click the cell under the InterfaceType column heading for setting a CLIP interface.
5. Click loopback.
6. Repeat steps 4 and 5 as required.
7. In the table, double-click the cell under the InterfaceId column heading.
8. Type a numerical value from 1 to 16.
9. Repeat steps 7 and 8 as required.
10. On the toolbar, click Apply.

## Variable definitions

The following table describes the fields for the Source Interface tab

Field | Description
--- | ---
AppId | Indicates the source interface for radius, syslog, tacacs, snmp-traps, ssh, and telnet.
InterfaceType | Indicates the interface type and you can assign loopback for the source interface.
InterfaceId | Indicates the loopback interface identifier. Values range from 1 to 16.