Explanation
Configuring the HTTP Client
Perform this task to enable the HTTP client and configure optional client characteristics.
The standard HTTP 1.1 client and the secure HTTP client are always enabled. No commands exist to disable the HTTP client. For information about configuring optional characteristics for the HTTPS client, see the HTTPS-HTTP Server and Client with SSL 3.0, Release 12.2(15)T, feature module.
SUMMARY STEPS
1. http://www.cisco.com/en/US/i/templates/blank.gifenable

2. http://www.cisco.com/en/US/i/templates/blank.gif
3. http://www.cisco.com/en/US/i/templates/blank.gifip http client cache {ager interval minutes | memory {file file-size-limit | pool pool-size-limit
4. http://www.cisco.com/en/US/i/templates/blank.gifip http client connection {forceclose | idle timeout seconds | retry count | timeout seconds
5. http://www.cisco.com/en/US/i/templates/blank.gif password

6. http://www.cisco.com/en/US/i/templates/blank.gif proxy-name proxy-port port-number

7. http://www.cisco.com/en/US/i/templates/blank.gifip http client response timeout seconds

8. http://www.cisco.com/en/US/i/templates/blank.gifip http client source-interface type number

9. http://www.cisco.com/en/US/i/templates/blank.gif username

Reference: HTTP 1.1 Web Server and Client
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http://www.cisco.com/en/US/docs/ios/netmgmt/configuration/guide/nm_http_web.html