Understanding Dial Backup

Dial backup is a feature that reestablishes network connectivity through one or more backup ISDN dialer interfaces after a primary interface fails. The backup dialer interfaces are activated only when the primary interface fails. ISDN backup connectivity is supported on all interfaces except lsq-0/0/0. When the primary interface is reestablished, the ISDN interface is disconnected.

Related Topics

• Junos OS Feature Support Reference for SRX Series and J Series Devices