Alcatel Carrier Internetworking Solutions 7700 Manual Do Utilizador

Hardware Basics

49

The Chassis Management Module (CMM) is the management 
unit for OmniSwitch 7700/7800 switches. In its role as the 
management unit, the CMM provides key system services, 
including:

• Console, modem, 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 management

• Temperature management

• Switch diagnostics

• Important availability features, including redundancy 

(when used in conjunction with another CMM) and 
image rollback.

CMM redundancy is an important resiliency feature. For 
CMM redundancy, two fully-operational CMM modules must 
be installed in the chassis at all times.

When two CMMs are running in the switch, one CMM has the 
primary role and one CMM 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”).

Note. By default, the CMM in slot A automatically 
assumes the primary role. Refer to pages 

 or 

 for 

CMM slot A and B positions.

If the primary CMM fails or goes offline for any reason, the 
secondary CMM is notified. The secondary CMM then auto-
matically assumes the primary role.

For important information on CMM redundancy, refer to your 
Hardware Users Guide.