Cabletron Systems SSIM-R8-02 Specifikace stáhnout pdf (Strana 287)

Enterasys Xpedition User Reference Manual 267

Web Caching

Bypassing Cache Servers

Some Web sites require source IP address authentication for user access, therefore HTTP

requests for these sites cannot be redirected to the cache servers. To specify the sites for

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 XP can provide proxy server redundancy by

transparently redirecting HTTP connections to the cache servers should the proxy server

fail. To achieve this, the XP 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 XP 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:

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>

Specify non-standard HTTP port. web-cache <cache-name> set http-port <port number>

Distribute destination address

across cache servers.

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

<ipaddr-range>|list <ipaddr-list>

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Cabletron Systems SSIM-R8-02 Specifikace Strana 287