Configuring a Persistent Backup
Connection
If your company needs a constant WAN connection between two offices, you
should configure a persistent backup connection. Then, if the primary con-
nection fails, the persistent backup connection will be established immedi-
ately, and it will remain up until the primary WAN connection is available
again.
To set up a persistent backup connection, you configure:
a physical interface (the BRI or modem interface)
a logical interface (which is a PPP interface) for the backup connection
backup settings on the logical interface for the primary WAN connection
Configuring the Physical Interface for a Persistent Backup
Connection
For persistent backup connections, you can configure a BRI interface for ISDN
lines or a modem interface for an analog connection over a regular
telephone line.
Configuring a BRI Interface (ISDN Only)
For a BRI interface, you must configure:
ISDN signaling type
local directory number (LDN)
service profile ID (SPID) for North America only
You must also activate the interface.
Accessing the Configuration Mode Context. To begin configuring the
BRI interface, move to the BRI interface configuration mode context:
Syntax: interface bri <slot>/<port>
For example, you might enter:
ProCurve(config)# interface bri 1/3
Configuring Backup WAN Connections
Configuring a Persistent Backup Connection
3-49