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Proxy server redundancy, Monitoring web-caching – Cabletron Systems SmartSwitch User Manual

Page 243

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SmartSwitch Router User Reference Manual

243

Chapter 15: Web Hosting Configuration Guide

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

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:

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:

Monitoring Web-Caching

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

Define destination sites to which
HTTP requests are sent directly.

web-cache

create bypass-list

range

|

list

list>|

acl

Specify non-standard HTTP port.

web-cache

set http-port

number>

Distribute destination address
across cache servers.

web-cache

set round-robin

range

|list

Show information for all caching
policies and all server lists.

web-cache show all