Support for multiple Web servers on a single platform
ClusterCATS does not support being configured to run with different types of Web servers on the same system.
For example, if an NT system is configured to run both the Netscape Enterprise Server and IIS, you can choose
to configure ClusterCATS with only one of these Web servers.
ClusterCATS Cluster Members must have a unique IP address
ClusterCATS Cluster members must have unique IP address. The name used to cluster a Web server, or virtual
server must not be either Round Robin or the name of a software virtual server. It should be the name that maps
to the IP address of the Web server that is being clustered.
Virtual Host Headers on IIS and Software Virtual Servers on Apache are not Supported
Virtual Host Headers on IIS and Software Virtual Servers on Apache allow you to run many Web sites on a single
computer. In technical terms, this allows you to support multiple host names with a single IP address.
ClusterCATS currently requires a different IP addresses for each virtual server.
Minimum version of Cisco Local Director Software required is 3.1.4
Prior to enabling ClusterCATS Load Balancing with Cisco Local Director, the Local Director software version must
be at version 3.1.4 or greater.
Configuring ClusterCats IP Failover With Cisco Local Director
When a Cisco Local Director is being used for load balancing and failover do not configure ClusterCats to perform
IP Failover (IP Aliasing). If ClusterCats does IP aliasing, the Cisco Local Director will not be able to reconnect to
the system after it has become available again and recovered the failed-over IP address.
Configuring Cisco Local Director Update Frequency
Set the Cisco Local Director load balancing update frequency to a value between 5 and 30 seconds. Set a longer
time as greater numbers of Web servers become configured in clusters doing Cisco Local Director load balancing
so as to not create too much overhead traffic to the Local Director. The dynamic-feedback timeout value should
be set to a value larger then the update frequency. We recommend you set the value to at least two times the
update frequency.
Configuring ClusterCats DFP Agent Listen Port with Cisco Local Director
If two or more Web servers on the same system are in clusters using Cisco Local Director load balancing, than
each cluster must have the same DFP Agent Listen Port number configured. The Clustercats DFP Agent can only
listen on one port.
Configuring the Cisco Local Director dynamic-feedback retry value
The dynamic-feedback retry value should be set to zero (0) to insure that the Cisco Local Director will continue
connection attempts to the ClusterCats DFP Agent in the event of a lengthy period of system unavailability.
Cisco Local Director dynamic-feedback security not supported
Do not enable the dynamic-feedback-pw. Clustercats does not support secure DFP host.
Improving Responsiveness When Integrating with Cisco Local Director
Page 20 of 26Release Notes - ColdFusion Server 4.5.1
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