Sun Chassis Monitoring Module

Sun Chassis Monitoring Module ... Module (CMM). Internally, each CMM contains an Ethernet switch forming an internal Ethernet network. Specifically, this internal network connects the CMM, Server Module service processors (SPs), and external Ethernet ports to enable full system management across an Ethernet LAN.

Installing a second CMM provides redundant system management access. Should network communication on one management port be lost, the management port on the redundant CMM will automatically become active. Internally, the management network is also redundant. Each Chassis Monitoring Module and blade SP is connected to both the primary and backup networks.