Nortel Networks NN46110-602 manual Solving performance problems, Eliminating modem errors

82 Chapter 4 Troubleshooting

4If the PPP layer still does not come up, enable the interface debugger to generate large amounts of packet traces in the event log. Report this information to Nortel Customer Support for further diagnosis.

Hardware encryption accelerator connectivity

If the hardware encryption accelerator fails, all sessions are automatically moved over so that the software can handle them.

Solving performance problems

This section describes ways to improve the performance of the remote workstation connection to the corporate network through a VPN Router. It also includes Microsoft networking and client setup and operation tips.

Eliminating modem errors

Modem hardware errors can impact performance when connecting to your corporate network over a dial-up connection. If modem hardware errors are occurring, try the following techniques to correct these errors and improve performance:

•Adjust the modem speed—If the speed of the modem is set too high, it can cause hardware overruns. Reset the modem speed to match the real speed of the modem.

•Disable hardware compression—The data passed through the extranet connection is encrypted, and encrypted data is typically not compressible. Depending on the algorithm the modem uses to compress the encrypted (non-compressible) data, the data can expand in size and overrun the modem's buffers.

Performance tips for configuring Microsoft networking

For Microsoft networking to work as designed over the extranet, each of the following components, if configured, must work together:

NN46110-602