3Com 3036, Configuration Manual

Page: 751 / 762

Troubleshooting DCC 747
Use the DCC Debugging
Information to Locate
Problems
Enabling DCC debugging
Execute 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.
Table 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.