Users Guide

NOTE: You can congure the enclosure either with a single CMC or with redundant CMCs. In redundant CMC congurations, if
the primary CMC loses communication with the enclosure or the management network, the standby CMC takes over chassis
management.
Active CMC Election Process
There is no dierence between the two CMC slots; that is, slot does not dictate precedence. Instead, CMC that is installed or booted rst
assumes the role of the active CMC. If AC power is applied with two CMCs installed, CMC installed in CMC chassis slot 1 (the left)
normally assumes the active role. The active CMC is indicated by the blue LED.
If two CMCs are inserted into a chassis that is already powered on, automatic active/standby negotiation can take up to two minutes.
Normal chassis operation resumes when the negotiation is complete.
Obtaining Health Status of Redundant CMC
You can view the health status of the standby CMC in the Web interface. For more information about accessing CMC health status in the
Web interface, see Viewing Chassis Information and Monitoring Chassis and Component Health.
Installing and Setting Up CMC 39