Creating A Backup Ppp Interface; Activating The Interface - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

Configuring Backup WAN Connections
Configuring a Persistent Backup Connection
A backup interface is simply a supplemental PPP interface that you create and
configure as you would any PPP interface. You must configure an IP address
for the backup PPP interface. For best security practices, ProCurve Network-
ing also recommends that you configure PPP authentication.
You do not configure the number that the backup interface will call, nor
whether the interface will answer or place backup calls (or both), from the
backup interface configuration mode context. You enter these configurations
for each primary connection from its logical interface configuration mode
context. For example, if the primary connection is Frame Relay running over
a T1-carrier line, you would enter these configurations from the Frame Relay
subinterface configuration mode context.

Creating a Backup PPP Interface

To create the backup interface, enter the following command from the global
configuration mode context:
Syntax: interface ppp <interface number>
For example, to create PPP 2, enter:
ProCurve(config)# int ppp 2
The backup PPP interface only provides backup; you cannot use it for a
primary WAN connection. The backup PPP interface, like the backup line, can
provide redundancy for more than one WAN connection.
You can also configure a separate PPP interface for each primary WAN
connection—for example, when your peers have different authentication
settings. If the router contains more than one than backup module, you should
configure a separate backup PPP interface for each module. Both backup
modules can then be active at the same time.

Activating the Interface

The PPP interface cannot make or receive backup calls unless it has been
manually activated. Enter:
ProCurve(config-ppp 2)# no shutdown
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