This procedure describes how to add or modify a Loopback Address.
Modifying, Enabling and Disabling a Loopback Interface
To modify a Loopback Interface:
- Click the expand ( ) Icon next to the entry you wish to modify.
- Edit the entry properties as required.
To enable a Loopback Interface:
- Select the check box next to the entry you wish to enable.
- Click the Enable ( ) icon at the top of the table.
To disable a Loopback Interface:
- Select the check box next to the entry you wish to disable.
- Click the Disable ( ) icon at the top of the table.
Configuring Loopback Interfaces
Sonus SBC 1000/2000
Loopback IP: 172.16.40/24
In this example the Cisco device can ping 22.214.171.124. But, by default, it is unable ping 172.16.40.1. So a static route must be established on the Cisco device before it can reach 172.16.40.0/24 through 126.96.36.199.
The advantage of using a loopback interface is that SIP may use 172.16.40.1 in its configuration, and the interface IP addresses may be changed without impacting current calls in progress or SG configurations. When interface IP addresses are changed, it may affect RTP/RTCP packets using that interface, as would any network-level change. Calls in progress or SG configurations on the Sonus SBC 1000/2000 and other SIP-layer peers of Sonus SBC 1000/2000 will not have to be suspended, re-configured, torn-down, or re-established in any way. The applications use IP addresses completely isolated from the IP addresses that are used on the links/networks.
Identification/Status - Field Definitions
The Identification/Status Panel controls the network identity of the port and its administrative state (Up or Down). It also provides the port's current service status and when that status last changed.