HP 7102dl - ProCurve Secure Router Configuration Manual page 183

Viewing Backup Configurations and Troubleshooting Backup Connections
6. If the local router requires the remote router to authenticate itself, view
the running-config for the backup PPP interface (show run int ppp
<interface number>) and verify that the interface contains the correct
username and password for the peer.
The username and password the router accepts are listed under user-
name and password. Remember that these might be different than those
in the local database configured from the global configuration mode
context.
7. Turn off the debug messages by entering undebug all.
The Backup Connection Goes Up But Traffic Does Not Reach Its
Destination. Follow these steps:
1. View the route table (show ip route). The table should now include a
route to the remote network(s) that either lists the backup interface as
the forwarding interface or the peer's backup interface IP address as the
next hop address.
2. If necessary, add a static route to the remote network.
3. If you are using dynamic routing, verify that you have enabled the protocol
on the backup network. If you are using BGP to advertise local networks,
the BGP interface should be able to advertise the backup network.
The Backup Connection Goes Up When the Primary Connection Is
Still Good. This problem can be caused in two ways:
The primary interface is configured to always answer backup calls—If the
connection to the router placing the backup call is most important, this is
not necessarily a problem. However, if this setting has been configured in
error, you must change the backup call mode for the primary connection.
(See "Setting the Backup Call Mode" on page 3-61.)
The backup interface has been configured with backup settings—It is very
important to configure all backup settings, including the backup dial list
and backup call mode, on the primary interface. If, for example, you enter
a backup number in backup PPP interface 2, the router will consider it to
be a primary connection. It will notice that the PPP 2 is down, so it will
initiate a backup call.
The Router Does Not Call the Secondary Number When the First Call
Does Not Connect. You can add more than one number to a primary inter-
face's backup dial list. If, when the router attempts to initiate a backup call,
the call to the first number does not connect, the router calls the second
number.
Configuring Backup WAN Connections
3-95