Setting The Backup Call Mode - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

N o t e
You configure separate backup connections for every PVC in a Frame Relay
network or ATM connection. Therefore, you enter the backup commands
from the Frame Relay or ATM subinterface. The analog or ISDN line can only
provide active backup for one PVC at a time. Analog and ISDN lines establish
a point-to-point connection to another router.

Setting the Backup Call Mode

The role a router takes in the backup call process depends on the backup call
mode you assign to the primary connection's logical interface. If you allow the
connection to originate calls, the router will, by default, initiate the dial-out
process 10 seconds after the connection fails. (You can change this default
waiting interval. See "Setting Backup Timers" on page 3-66.) It will then begin
the dial-out process described below.
If you allow the router to only answer calls, it will wait to receive a call to back
up the connection. The router will then begin the dial-in process described in
"Dialing In" on page 3-61.
Dialing Out. When the Secure Router OS places a backup call, it follows
these steps (see Figure 3-15):
1. The Secure Router OS places an outbound call, dialing the number stored
in the backup dial list. This list is configured individually in the logical
interface for each primary connection. The name and number of the
backup PPP interface (the logical interface that maintains the backup
connection) are also stored in the backup dial list. For example, if the
backup PPP interface is PPP 2, PPP 2 is stored in the primary interface's
backup dial list with the number the PPP 2 interface should call for
backup. This number is that of the analog or BRI module on the router on
the other side of the connection. (See Figure 3-16.)
Configuring Backup WAN Connections
Configuring a Persistent Backup Connection
3-59