Huawei Quidway S3900 Series - Page 699

Operation Manual – Web Cache Redirection
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 1 Web Cache Redirection Configuration
Huawei Technologies Proprietary
1-1
Chapter 1 Web Cache Redirection Configuration
 Note:
The S3900-SI series switches do not support Web cache redirection.
1.1 Overview
HTTP (hypertext transfer protocol) is one of the most widely used approaches to
access the Internet. Ethernet switch provides Web cache redirection function, which
helps relieve the pressure on the links connecting to WANs and improve the speed to
access the Internet. The following figure shows an implementation of Web cache
redirection.
Internet
Sw itc h
InternetInternetInternet
(1)
(2)
(3)
Internet
Sw itc h
InternetInternetInternet
(1)
(2)
(3)
(4)
Internet
Sw itc h
InternetInternetInternet
(1)
(2)
(3)
Internet
Sw itc h
InternetInternetInternet
(1)
(2)
(3)
(4)
Web cache
Figure 1-1 Web cache redirection
As shown in the figure, PC is one of the users in the LAN attached to the switch, and
Web cache is the server that stores the Internet information often browsed by the users
in the LAN. When Web cache redirection is enabled on the switch, the traffic generated
by Internet access via HTTP is redirected to Web cache. If the desired contents are in
the cache, it directly forwards them to users, thus eliminating the need for users to
access the Internet. If the cache does not have the information, the users will log onto
the Internet to gain information.