Line Maintenance; Troubleshooting With Loopbacks; Troubleshooting Ppp For The Isdn Connection - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

Configuring Demand Routing for Primary ISDN Modules
Troubleshooting Demand Routing

Line Maintenance

You can also perform some basic maintenance on your ISDN line. Enter:
Syntax: maintenance [restart-d | reset]
Use the restart-d option to reset and restart the D channel. This may help in
cases where there is a problem in the call process and one of the channels
becomes hung.
Use the reset option to reset the port hardware. Occasionally the port
interface may get into a loop if the disconnect process isn't completed before
the connection is lost. To reset all the channels and the port hardware, enter:
ProCurve(config-bri 1/1)# maintenance reset

Troubleshooting with Loopbacks

A loopback call tests the ability of the router to initiate and terminate an ISDN
call, verifying that the ISDN circuit is up and running. To test and diagnose
your ISDN lines, you can set loopbacks using the following commands:
Syntax: loopback network [b1 | b2 | both]
Syntax: loopback local [b1 | b2 | all]
Use the network option to set a loopback toward the switch. This tests that
the line between your router and the switch is operational. Use the local
option to set a loopback within your local network. This tests whether there
is a problem within your LAN that is preventing the connection.
You can specify which B channel you want to test using the b1, b2, and both
options. Using the b1 or b2 options sets up a loopback call using the channel
you specified and the D channel. To test both B channels and the D channel,
enter the all option.

Troubleshooting PPP for the ISDN Connection

Because PPP is the Data Link Layer for dial-up connections, you may need to
troubleshoot the negotiation of a PPP session or PPP authentication (if you
have configured authentication for the connections). Table 8-17 lists the
debug commands you can use to monitor PPP interfaces.
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