MACROMEDIA COLDFUSION 5-ADVANCED ADMINISTRATION, Manual

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Load-Balancing Devices 291
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If two or more Web servers on the same system are in clusters using Cisco
LocalDirector load balancing, then each cluster must have the same DFP Agent
Listen Port number configured. The ClusterCATS DFP agent can only listen on
one port.
LocalDirector dynamic-feedback command settings
Use the LocalDirector
dynamic-feedback
command options as described in this
section to optimize your LocalDirector setup.
Note
Do not use the
dynamic-feedback
-
pw
command. ClusterCATS does not support
secure DFP hosts.
dynamic-feedback -timeout
Use the
dynamic-feedback -timeout
option to set
timeout
to a value larger than
the
update frequency
so that the LocalDirector does not prematurely terminate
the connection with the cluster because of inactivity. Allaire recommends that
you set the value to at least two times the update frequency.
dynamic-feedback -retry
Use the
dynamic-feedback -retry
option to set the
retry
value to zero (
0
) to
ensure that the LocalDirector will continue connection attempts to the
ClusterCATS DFP agent in the event of a lengthy period of system unavailability.
For more information on using the LocalDirector
dynamic-feedback
command,
refer to Cisco’s LocalDirector Command Reference.
To integrate ClusterCATS with the Cisco LocalDirector:
1 Be sure to review all considerations before continuing with this procedure.
2 Complete the LocalDirector basic hardware installation and configuration. Be
sure that you have defined an IP address for the LocalDirector and that the
LocalDirector network interfaces are configured correctly. You can use the
ping
utility to test network connectivity.
3 Create a virtual server (
www.yourcompany.com
) in LocalDirector that corresponds
to the cluster.
4 In LocalDirector, bind explicit (real) servers participating in the cluster with the
virtual server.
5 Use the LocalDirector’s
dynamic-feedback
command to specify the IP addresses
of each explicit server (cluster member) and port number each server will use to
listen for DFP requests from the LocalDirector. This port number must be the
same as the DFP Agent Listen Port configured in 9.
For example:
dynamic-feedback 111.168.00.22:9100 retry 0 attempts 30 timeout 60
The DFP protocol will connect to server 192.168.64.22 at port 9124. If the
connection between the LocalDirector and the server is closed for any reason, the