94 Chapter 4 Troubleshooting

Clearing your Web browser cache when upgrading

To avoid problems when upgrading software revision levels, Nortel recommends that you clear your browser cache and exit the browser and all associated windows (such as mail and news readers). See the following section for browser cache clearing instructions.

Clearing cache

A browser caches windows to improve performance when the same window is requested again. The VPN Router’s HTTP server allows browsers to cache Java class files and all image files, but does not allow browsers to cache body windows that contain the dynamically generated information. Both Internet Explorer and Netscape allow you to clear the browser cache which causes all windows to be rerequested the next time they are required. To manually clear the browser cache in Internet Explorer V4.x, select View > Internet Options, and click Delete Files. To manually clear the browser cache in Netscape V4.x, select Edit > Preferences

>Advanced > Cache and click Clear disk and memory cache.

Web browser error messages

No data in post message

Cause: This message often appears on the main body window if you use the browser’s back arrow to revisit a previously displayed window. The browser displays this message when it knows you are revisiting a dynamically generated window.

Action: To see the window, use the left navigational area to select it.

Internal error message

Cause: The HTTP server was unable to allocate memory. This indicates that the VPN Router is very low on memory.

Action: Terminate any unnecessary tasks to free up memory. It may be necessary to reboot the VPN Router. If this condition recurs, there can be a serious problem. Contact Nortel Customer Support.

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Nortel Networks NN46110-602 Web browser error messages, Clearing your Web browser cache when upgrading, Clearing cache