Comtech EF Data / Stampede
FX Series Administration Guide - Version 6.2.2
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Chapter: FX Series Configuration
Section: Traffic Interface Settings
MN-FXSERIESADM6 Rev 6
User-facing service group:
This is the WCCP service group that the FX should join to receive redirected client traffic. The FX
will not attempt to join this group unless it successfully enrolls in the main service group. This
prevents the situation where client requests are redirected to the FX when it is not able to
receive server responses. The default value is 99.
Redirect based on:
If “Source IP” then the router will redirect responses from the content server to this member,
otherwise the router will redirect client requests that otherwise would have been directed to the
content server. Service groups are defined at the router. The default value is “Source IP”.
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WCCP Router Configuration and Status Monitoring
Configuration:
The following is an example of some common WCCP Router “cli” commands.
conf t
ip wccp enable
ip wccp version 2
interface (specify interface carrying traffic)
ip web-cache redirect
CTRL-Z
Status Monitoring:
The following WCCP Router “cli” commands can show status:
show ip wccp
show ip wccp 99 view
show ip wccp 96 detail
term mon
debug ip wccp packets
debug ip wccp events
clear ip wccp
WCCP IP Spoofing Configuration for Routers
The FX can preserve the source IP address of the remote client when making requests on their behalf by
joining two service groups. The first service group receives the redirected client requests and is also
known as the “User-facing” service group. The second is referred to as the “Server-facing” service group
and it receives the redirected server responses. If two or more FXs have joined these service groups, then
the router will be instructed to split the load of the user-facing service group based on source IP address,
and the responses of the server-facing service group will be split based on destination IP address. This
technique ensures that the response will be directed to the same FX that originated the request on behalf
of the remote user.
The recommended router configuration is to use three interfaces, each corresponding to a different
subnet. To illustrate the setup, we provide an example configuration along with a “show running-config”
that is compatible with the default WCCP settings of the FX.
Example:
Interface A: (Ethernet0/0)
This is the user-facing subnet that receives redirected requests from clients.
Interface B: (Ethernet0/1)
This is the server-facing subnet that receives redirected responses from the content server.
