The Chassis Monitoring Module (CMM) provides the basic chassis management functions, such as coordination of power supply, Sun Blade Server Modules (blades), Network Express Modules (NEMs), and control of hot-plug service operations. The CMM is a hot-pluggable, customer-replaceable unit (CRU).
The CMM Power-On Policy, in effect, applies main or standby power to units installed in the chassis. For further information about the CMM Power-On Policy and its options, see CMM Power-On Policy.
Two CMMs together form a redundant management network. This embedded Ethernet management network works with the service processor (SP) on each blade to provide status information of the common chassis components.
Each CMM contains an Ethernet switch that provides the following connections:
External, Gigabit RJ-45 connection
100-Mbps internal connections to both CMMs, each of which run the Sun ILOM software
100-Mbps internal connections to each blade's SP subsystem, which also runs ILOM software
100-Mbps internal connection to each NEM, which will support future NEMs that require local SP subsystems
Embedded in the CMM is the Sun ILOM software. The CMM provides direct environmental and replaceable unit inventory management via the ILOM web interface, a command-line interface, or an SNMP interface. The CMM is also compatible with the Sun N1 System Manager software and some third-party management software.
For purposes of IPMI environmental management, the CMM appears to each SP as a satellite baseboard management controller (BMC), providing the status of common chassis elements. In addition, the CMM provides management access to each blade via a single (per CMM) serial port providing you with access to the blades SP consoles' command-line interfaces.
The front panel of the CMM provides a serial DB-9 console port and two, RJ-45 10/100/1000BASE-T Ethernet ports. You can use the RJ-45 to DB-9 connector that is shipped with the chassis as an option. Note that the AUX port is not functional in this version of the CMM. Plugging the AUX port on the CMM to a switch provides no benefits, nor does it do any harm.
When redundant CMMs are installed and both NET MGMT ports are connected, the CMMs will cooperate to block traffic on one of the ports, and all traffic will flow through the other "active" port. Both ports remain active at the link level. If the active port were to fail, the CMMs will again work together to enable the standby port and to disable the formerly active port. In this way, connecting both NET MGMT ports to one or more switches provides a resilient connection to the management network.
The indicator LEDs on the CMM front panel include:
Green OK LED
Amber Service Action Required LED
Blue Ready-to-Remove LED
White Locator LED
Green Ethernet Link Activity LEDs
Green Active CMM LED
For the location and description of these LEDs, see About Chassis Monitoring Module Indicators.
On the left side of the CMM front panel are two recessed pushbuttons, the Reset button and the Reset Password button. Use a small stylus, such as the end of a paper clip, to activate these buttons:
Reset button – Performs a hardware reset on the CMM.
Reset Password button – Resets the root password of the CMM to the factory default of changeme.