Reserved IP address range

Assigning a static IP address from the Cassatt Active Response DCHP range to servers or other devices that should not be controlled by Cassatt Active Response.

If your site has devices with static IP addresses that are inside the Cassatt Active Response DHCP range, reserve those addresses from the Controller so that Cassatt Active Response does not assign those addresses to servers issuing DHCP requests.

See: Network Addresses: Calculating Requirements

Not setting one of the control node power controllers to a static IP address.

If you fail to set a static IP address for control nodes, the following errors can occur:

• A control node can be discovered as an application node.
• Failover does not work.

See: Network Addresses: Calculating Requirements

Booting order of application nodes

Specifying the hard drive in the boot order for a dynamically allocated resource.

See:
Application Node Setup: Dell

Application Node Setup: HP

Application Node Setup: IBM

Number of application nodes to boot

Booting too many application nodes at a time.

For best performance, do not boot more than a rack of application nodes at a time.

Power controller firmware

Using an unsupported version of the power controller firmware.

If you are leveraging Cassatt Active Response's remote management feature, you must use a supported version of the power controller firmware. See: Recommended Hardware and Firmware

Cassatt Active Response Controller

Running the Controller in more than one browser window on the same computer.

Some older browsers do not maintain different sessions per browser window (for example, older Mozilla versions). If you run Cassatt Active Response in more than one browser window, you may experience synchronization issues between the two windows and other undesirable behaviors. We recommend opening only one browser session of Cassatt Active Response at a time.

When adding user accounts, not setting up a user account on the standby control node (if using dual-control nodes).

If you are using dual-control nodes, you must set up user accounts for both the active and standby control nodes to accommodate the case of failover; if you don't, users may not be able to log into the Controller if a failover occurs.
See: User Authentication and Management.

Power controller user ids and passwords

Forgetting to create user ids and passwords on power controllers or having a mismatch.

If you forget to set power controller user ids and passwords, or have a mismatch between what was set on the power controllers and what was set during Cassatt Active Response installation, nodes will not be discovered and Cassatt Active Response won't be able to manage the application nodes.

NOTE: Power controller user ids/ passwords can be set during Cassatt Active Response installation or in the Controller.

Cassatt Active Response files

Using Linux commands to manage Cassatt Active Response instead of the Controller.

Using Linux commands on files that belong to Cassatt Active Response can cause problems. For example, using the rm command to remove an image can disrupt services and leave behind clutter. Editing image files can also affect upgrade. Because the Cassatt Active Response Controller has all the utilities you need to manage Cassatt Active Response-related files, it is the recommended utility.