The Lenovo Chassis Management Module 2 (CMM) is a hot-swap Lenovo Flex System module that you use to configure and manage all installed Lenovo Flex System components. The CMM provides system-management functions for all components in a Lenovo Flex System Enterprise Chassis. It controls a serial port for connection to a local console or a serial management network and supports data rates of 10/100 Mbps and 1 Gbps with autonegotiate.