Table of Contents

1 Web Cache Redirection Configuration Guide· 1-1

Configuring Web Cache Redirection· 1-1

Network Diagram·· 1-1

Networking and Configuration Requirements· 1-1

Applicable Product Matrix· 1-2

Configuration Procedure· 1-2

Complete Configuration· 1-3

Precautions· 1-4

 

Configuring Web Cache Redirection

The Web cache redirection function redirects the packets accessing Web pages to a Web cache server, thus reducing the load on the links between a LAN and the Internet and improving the speed of obtaining information from the Internet.

Network Diagram

Figure 1-1 Network diagram for Web cache redirection configuration

 

Networking and Configuration Requirements

The network of a company is described as follows:

l          The marketing department uses VLAN 10 and is connected to Ethernet 1/0/1 of the switch. The IP address of the VLAN interface for VLAN 10 is 192.168.1.1/24.

l          The R&D department uses VLAN 20 and is connected to Ethernet 1/0/2 of the switch. The IP address of the VLAN interface for VLAN 20 is 192.168.2.1/24.

l          The administration department uses VLAN 30 and is connected to Ethernet 1/0/3 of the switch. The IP address of the VLAN interface for VLAN 30 is 192.168.3.1/24.

l          The Web cache server belongs to VLAN 40 and is connected to Ethernet 1/0/4 of the switch. The IP address of the VLAN interface for VLAN 40 is 192.168.4.1/24. The IP address and the MAC address of the Web cache server is 192.168.4.2 and 0012-0990-2250.

l          The router is connected to Ethernet 1/0/5 of the switch. The switch accesses the Internet through a router. Ethernet 1/0/5 belongs to VLAN 50 whose VLAN interface is assigned IP address 192.168.5.1/24.

Enable Web cache redirection on the switch to redirect all the HTTP packets of the three departments to the Web cache server, thus reducing the load on the WAN link and improving the speed of obtaining information from the Internet.

Applicable Product Matrix

Product series	Software version	Hardware version
S3600-EI series	Release 1510, Release 1602	All versions

 

Configuration Procedure

# Create VLAN 10 for the marketing department and configure the IP address of VLAN-interface 10 as 192.168.1.1.

<H3C> system-view

[H3C] vlan 10

[H3C-vlan10] port Ethernet 1/0/1

[H3C-vlan10] quit

[H3C] interface Vlan-interface 10

[H3C-Vlan-interface10] ip address 192.168.1.1 24

[H3C-Vlan-interface10] quit

# Create VLAN 20 for the R&D department and configure the IP address of VLAN-interface 20 as 192.168.2.1.

[H3C] vlan 20

[H3C-vlan20] port Ethernet 1/0/2

[H3C-vlan20] quit

[H3C] interface Vlan-interface 20

[H3C-Vlan-interface20] ip address 192.168.2.1 24

[H3C-Vlan-interface20] quit

# Create VLAN 30 for the administration department and configure the IP address of VLAN-interface 30 as 192.168.3.1.

[H3C] vlan 30

[H3C-vlan30] port Ethernet 1/0/3

[H3C-vlan30] quit

[H3C] interface Vlan-interface 30

[H3C-Vlan-interface30] ip address 192.168.3.1 24

[H3C-Vlan-interface30] quit

# Create VLAN 40 for the Web cache server and configure the IP address of VLAN-interface 40 as 192.168.4.1.

[H3C] vlan 40

[H3C-vlan40] port Ethernet 1/0/4

[H3C-vlan40] quit

[H3C] interface Vlan-interface 40

[H3C-Vlan-interface40] ip address 192.168.4.1 24

[H3C-Vlan-interface40] quit

# Create VLAN 50 for the switch to connect to the router and configure the IP address of VLAN-interface 50 as 192.168.5.1.

[H3C] vlan 50

[H3C-vlan50] port Ethernet 1/0/5

[H3C-vlan50] quit

[H3C] interface Vlan-interface 50

[H3C-Vlan-interface50] ip address 192.168.5.1 24

[H3C-Vlan-interface50] quit

# Configure Ethernet 1/0/4, the port connected to the Web cache server, as a trunk port, and configure the port to permit the packets of VLAN 40 and VLAN 50 to pass through.

[H3C] interface Ethernet 1/0/4

[H3C-Ethernet1/0/4] port link-type trunk

[H3C-Ethernet1/0/4] port trunk permit vlan 40 50

[H3C-Ethernet1/0/4] quit

# Enable Web cache redirection to redirect all the HTTP packets received from VLAN 10, VLAN 20, and VLAN 30 to the Web cache server.

[H3C] webcache address 192.168.4.2 mac 0012-0990-2250 vlan 40 port Ethernet 1/0/4

[H3C] webcache redirect-vlan 10

[H3C] webcache redirect-vlan 20

[H3C] webcache redirect-vlan 30

Complete Configuration

#

vlan 10

#

vlan 20

#

vlan 30

#

vlan 40

#

vlan 50

#

interface Vlan-interface10

 ip address 192.168.1.1 255.255.255.0

#

interface Vlan-interface20

 ip address 192.168.2.1 255.255.255.0

#

interface Vlan-interface30

 ip address 192.168.3.1 255.255.255.0

#

interface Vlan-interface40

 ip address 192.168.4.1 255.255.255.0

#

interface Vlan-interface50

 ip address 192.168.5.1 255.255.255.0

#

interface Ethernet1/0/1

 port access vlan 10

#

interface Ethernet1/0/2

 port access vlan 20

#

interface Ethernet1/0/3

 port access vlan 30

#

interface Ethernet1/0/4

 port link-type trunk

 port trunk permit vlan 1 40 50

 webcache address 192.168.4.2 mac 0012-0990-2250 vlan 40

#

interface Ethernet1/0/5

 port access vlan 50

#

 webcache redirect-vlan 10

 webcache redirect-vlan 20

 webcache redirect-vlan 30

#

Precautions

When configuring Web cache redirection, consider the following:

l          To ensure the success of Web cache redirection, check that the VLAN-interfaces for all the involved VLANs (VLAN 40, VLAN 10, VLAN 20, and VLAN 30) are up.

l          Do not redirect the HTTP packets destined for VLAN 40 to the Web cache server.

l          Enabling STP can cause Web cache redirection failure.