Troubleshoot Mobile VPN with L2TP

This topic describes common types of problems you might encounter with Mobile VPN with L2TP, and describes the solutions that most often resolve these problems. Even after the VPN client connects, client traffic might not be able to reach some network resources because of network or policy configuration problems.

We recommend that you do not use the private network ranges 192.168.0.0/24 or 192.168.1.0/24 on your corporate or guest networks. These ranges are commonly used on home networks. If a mobile VPN user has a home network range that overlaps with your corporate network range, traffic from the user does not go through the VPN tunnel. To resolve this issue, we recommend that you Migrate to a New Local Network Range.

If you cannot connect to network resources through an established VPN tunnel, see Troubleshoot Network Connectivity for information about other steps you can take to identify and resolve the issue.