The Lenovo Chassis Management Module 2 is a hot-swap Lenovo Flex System chassis module that you use to configure and manage components in your Flex System chassis environment.

The Lenovo Chassis Management Module 2 supports multiple Flex System chassis types. The CMM automatically detects the chassis type where it is installed. The CMM firmware adjusts the features it supports and options it displays based on its operating environment.

The Flex System chassis automatically detects installed modules and node devices and stores their vital product data (VPD). You can configure and manage Flex System chassis components from a remote location via an Ethernet connection through the Lenovo Chassis Management Module 2 web interface, the Lenovo Chassis Management Module 2 command-line interface (CLI), or SNMPv1 and SNMPv3. You can also configure and manage Lenovo Flex System chassis components through a local serial connection by using the Lenovo Chassis Management Module 2 CLI.

Note: You can also configure some I/O modules directly, by using an external I/O-module port. See the documentation that comes with each I/O module for information.

The Lenovo Chassis Management Module 2, referred to throughout this document as the CMM, provides system-management functions for all devices in the Flex System chassis. It provides a mini-USB serial-management connector for local management connection and a 10/100/1000 Mbps remote management and console (Ethernet) connector for local or remote management connection.

Note: An optional cable kit with adapters is available to convert the CMM mini-USB connector for RJ-45, DB-7, or standard USB cable connection. See Lenovo ServerProven compatibility for available Flex System chassis options.

The Flex System chassis comes with at least one CMM and supports CMM redundancy. Only one CMM can be primary in each Flex System chassis. If you install a standby CMM, it remains inactive until it is switched to act as the primary CMM.

  • If two CMMs are installed in a Flex System chassis, they should be of the same type. See Upgrading to a CMM 2 for information and instructions.
  • Unless otherwise noted, the term "CMM" in this document refers to all CMM types.
  • The CMM 2 is also called the CMM II.
  • The illustrations in this document might differ slightly from your hardware.

If your Flex System chassis is configured for redundant operation and a second CMM is installed, both will have the same level of firmware after the primary CMM updates the standby CMM after it is installed. The primary and standby CMMs can have the same IP address, or they can have different IP addresses so that the standby CMM can be accessed while it is inactive. The firmware must support redundant CMM function, to ensure changeover of control from the primary CMM to the standby CMM. The latest level of CMM firmware is available at Lenovo Datacenter Support site.

The management processor in the CMM communicates with the system-management processor in each compute node to support features such as compute node power-on requests and error and event reporting.

The product name, serial number, and media access control (MAC) address are on the identification label on the side of the CMM. Information that you need to connect to the CMM for the first time is on the network access tag that is attached to the front of the CMM (see CMM network access tag for informastion). Note that the network access tag might have been removed from your CMM during installation. The following illustration shows the controls, indicators and connectors on the CMM.

Graphic of the CMM with call outs for release handle, default IP address location, and MAC address location.

You can obtain up-to-date information about your CMM and other Lenovo Flex system products at Lenovo Datacenter Support site.