3Com 10014299 Use the DCC Debugging Information to Locate Problems

Troubleshooting DCC 747

Use the DCC Debugging Information to Locate ProblemsEnabling DCC debuggingExecute the following commands in system view for displaying the DCC debugging information:

[Router] debugging dialer event

[Router] debugging dialer packet

[Router] info-center enable

Output debugging information for the interconnection failure between DCC and the remote end and diagnosis In this section, the debugging information that may be output when DCC cannot reach the remote end will be displayed and explained. The user can solve the problems with the solutions recommended in this section.

Tabl e 774 DCC Fault Messages

Message Fault

DCC: Receive CALL_DISC_IND The debugging information is probably output

because:

The physical connection between the local and

remote ends is down, phone cable is not securely

connected to the router, or the quality of phone

line is not good.

PPP authentication is not correctly configured, so

the PPP authentication is failed.

Remote DCC authentication is failed, because

name in the commands dialer user and dialer

route configured for DCC is inconsistent with

name configured for PPP authentication, and the

dialer route at the remote end does not contain

the local network address.

The remote end disconnects the connection

because the remote DCC idle-timeout timer has

timed out.

Solution:

If PPP configuration is incorrect or name

configurations are inconsistent, implement the

configuration as shown in the above example.

If it is the problem of the network address, apply

the following measures in the configuration of the

remote end: Add the dialer route corresponding to

the network address of the local router on the

remote router. Alternatively, remove all the dialer

routes configured at the remote end, and use the

dial number.

DCC: link negotiation Down on

interface ***

The link is probably disconnected because PPP

negotiation is failed due to a wrong PPP

configuration. To solve the problem, refer to the

previous example to make the configuration.

DCC: NAME authentication ERROR,

failed

The debugging information is probably outputted

because name configured in the commands dialer

user and dialer route is inconsistent with that

configured in PPP authentication. The connection is

disconnected since the local DCC authentication

has been failed. To solve the problem, refer to the

previous example to make the configuration.