Datasheet

Alcatel-Lucent Page 15
OmniSwitch 9000
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The Chassis Management Module (CMM) is the management unit for OmniSwitch 9000 Series switches.
In its role as the management unit, the CMM provides key system services, including:
• Console, USB, and Ethernet management port connections to the switch
• Software and configuration management, including the Command Line Interface (CLI)
• Web-based management (WebView)
• SNMP management
• Power distribution
• Switch diagnostics
• Important availability features, including redundancy (when used in conjunction with another CMM), software
rollback, temperature management, and power management
• The CMM also contains the switch fabric unit for the OmniSwitch 9000 Series switches. Data passing from one NI
module to another passes through the CMM fabric. When two CMMs are installed, both fabrics are normally active.
Note. OmniSwitch 9000 Series CMMs are colored orange to distinguish them from OmniSwitch 7700/7800 CMMs that
are colored white. Do not install and/or mix OmniSwitch 9000 Series and OmniSwitch 7700/7800 CMMs and/or NIs in the
same chassis. OmniSwitch 9000 Series CMMs will not interoperate with any of the OmniSwitch 7700/7800 CMMs/NIs in
the same chassis.
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CMM redundancy is one of the switch’s most important failover features. For CMM redundancy, two fully operational CMM
modules must be installed in the chassis at all times. In addition, the software on the two CMM modules must be synchronized.
When two CMMs are running in the switch, one CMM has the primary role and the other has the secondary role at any
given time. The primary CMM manages the current switch operations while the secondary CMM provides backup (also
referred to as “failover”). In a redundant configuration, if the primary CMM fails or goes offline for any reason, the
secondary CMM is instantly notified. The secondary CMM automatically assumes the primary role.
Note: CMM redundancy is not supported on the OS9600 switches.
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CMM synchronization refers to the process of copying all files in the /flash/working and /flash/certified directories of the
primary CMM to the /flash/working and /flash/certified directories of the secondary CMM. This ensures that the these
directories match exactly on both modules, which prevents the secondary CMM from assuming the primary role with
incorrect or outdated software or configuration files in the event of a primary CMM failure.
Important. In order to have effective CMM redundancy, CMM modules must be synchronized at all times.
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Each OS9000 CMM module contains hardware and software elements to provide management functions for the OS9000
system. The OS9000 CMM module also contains the switch fabric for the OS9000 system.
User data flowing from one NI module to another passes through the switch fabric.
The OS9000 will operate with one or two CMM modules installed.
If there are two CMM modules, one management processor is considered “primary” and is actively managing the system.
The other management processor is considered “secondary” and remains ready to quickly take over management in the
event of hardware or software failure on the primary. In the event of a failure, the two processors exchange roles and the
secondary takes over as primary. The switch fabric on the CMM operates independently of the management processor. If
there are two CMM modules installed, both fabric modules are normally active. Two CMM modules must be installed in
the OS9000 to provide full fabric capacity. If there is one CMM module installed, then there is a single management
feature and performance as a dual CMM system, but there is no “secondary” CMM. Hardware or software failures in the
CMM will result in a system reboot. The System fabric capacity is on half of the fabric capacity of a dual CMM system.