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303532-A Rev 00
C-1
Appendix C
Troubleshooting
To monitor your L2TP network and solve problems that may occur, first check the
event log file for any messages recorded by the LNS. For information about
viewing and reading event messages, see Event Messages for Routers and
Configuring and Managing Routers with Site Manager.
Table C-1
provides troubleshooting solutions for common problems with your
L2TP network.
Table C-1. Common L2TP Network Problems and Solutions
Problem What to Do
L2TP tunnel did not initiate. Check whether you enabled tunnel authentication for
the LNS on that slot.
If authentication is enabled, make sure that the
authentication password is the same for the LAC and
the LNS.
You can also check the tunnel statistics, which are
automatically enabled on the LNS.
L2TP host (PC or router) cannot
reach the corporate network
through the established
connection.
Check the address and user authentication
information configured in the RADIUS server
database.
(continued)