Troubleshooting

The following troubleshooting tips may help resolve a configuration problem without the need to contact your support representative.

If you contact your support representative regarding your Cisco 6510 Service Selection Gateway configuration, have a diagram of your network with IP addresses and subnet masks available, and have a copy of the output from the config show command.

If you have a recurring problem or encounter a problem that you cannot resolve, Cisco recommends placing the Cisco 6510 in debug mode. To place the unit in debug mode, issue the debug command with the appropriate parameters. The command parameters for the debug command allow you to debug specific service handlers, such as the Dynamic Host Configuration Protocol (DHCP) handler, the Domain Name System (DNS) handler, or the Remote Access Dial-In User Service (RADIUS) handler. You can also display a level of granularity for debug messages. For example, you can specify error to display error messages or packet, to dump the contents of packets handled by the Cisco 6510.

When you issue the debug command, debug messages are output to the device specified by the logtarget command. For detailed information on the debug command, see "debug" in the "Command Reference" chapter. For information on the logtarget command, see "logtarget" in the "Command Reference" chapter.

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Note Enabling debug handlers will result in increased overhead and decreased performance.

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Blank Console

• Make sure that you used the console cable provided with the Cisco 6510, and that it is properly connected.

• Make sure that the terminal emulation software is set at 9600 baud, 8 data bits, no parity, and 1 stop bit.

Cannot Access Servers

• Use the config show command to verify that each network interface is properly configured.

• Make sure that the devices on both network interface segments have the same network number.

Rebooting

If a Cisco 6510 is truly crashing (as opposed to just rebooting), it will dump core. Capture the core dump and provide it to your service representative so they can determine whether or not the issue is known.