Command Reference Guide

SROS Command Line Interface Reference Guide PPP Interface Configuration Command Set

Technology Review

This technology review provides information regarding specific backup router behavior (i.e., when the router will

perform backup, where in the configuration the Secure Router OS accesses specific routing information, etc.):

Dialing Out

1. The Secure Router OS determines to place an outbound call when either the Layer 1 or Layer 2 has a failure.

2. When placing outbound calls, the Secure Router OS matches the number dialed to a PPP interface.

3. When placing the call, the Secure Router OS uses the configuration of the related PPP interface for

authentication and IP negotiation.

4. If the call fails to connect on the first number dialed, the Secure Router OS places a call to the second number

if configured. The second number to be dialed references a separate PPP interface.

Dialing In

1. The Secure Router OS receives an inbound call on a physical interface.

2. CallerID is used to match the

backup number

command to the configured PPP interface.

3. If a match is found, the call connects and the Secure Router OS pulls down the primary connection if it is not

already in a down state.

4.If no match is found from CallerID, the call is terminated.