Cabletron Systems SmartSwitch manual Monitoring Web-Caching, Proxy Server Redundancy

Chapter 15: Web Hosting Configuration Guide

which HTTP requests are not redirected to the cache servers, enter the following command in Configure mode:

Define destination sites to which HTTP requests are sent directly.

web-cache <cache-name>create bypass-list range <ipaddr-range>list <ipaddr- list>acl <acl-name>

Proxy Server Redundancy

Some networks use proxy servers that receive HTTP requests on a non-standard port number (i.e., not port 80). When the proxy server is available, all HTTP requests are handled by the proxy server. The SSR can provide proxy server redundancy by transparently redirecting HTTP connections to the cache servers should the proxy server fail. To achieve this, the SSR must be configured to redirect HTTP requests on the (non- standard) HTTP port used by the proxy server.

To redirect HTTP requests to a non-standard HTTP port number, enter the following command in Configure mode:

Specify non-standard HTTP port.

web-cache <cache-name>set http-port <port number>

Distributing Frequently-Accessed Sites Across Cache Servers

The SSR uses the destination IP address of the HTTP request to determine which cache server to send the request. However, if there is a Web site that is being accessed very frequently, the cache server serving requests for this destination address may become overloaded with user requests. You can specify that certain destination addresses be distributed across the cache servers in a round-robin manner.

To distribute a specified destination address across cache servers, enter the following command in Configure mode:

Distribute destination address across cache servers.

web-cache <cache-name>set round-robin range <ipaddr-range>list <ipaddr-list>

Monitoring Web-Caching

To display Web-caching information, enter the following commands in Enable mode.

Show information for all caching policies and all server lists.

web-cache show all

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