Configuring Cmc Properties; Understanding Redundant Cmc Environment; About Standby Cmc - Dell PowerEdge VRTX User Manual

• server-n where
•
switch-1
•
cmc-active
and <ledState> specifies whether or not the LED should blink. Configuration options:
• 0 — not blinking (default)
• 1 — blinking
racadm raid <operation> <component FQDD>, where the
FQDD is for the component's physical disk drive and virtual disk.

Configuring CMC Properties

You can configure CMC properties such as power budgeting, network settings, users, and SNMP and email alerts using
the web interface or RACADM commands.

Understanding Redundant CMC Environment

You can install a standby CMC that takes over if your active CMC stops functioning. The redundant CMC may be pre-
installed or can be installed later. To make sure full redundancy or best performance, it is important that the CMC
network is properly cabled.
Failovers can occur when you:
• Run the RACADM cmcchangeover command. See the cmcchangeover command section in the
Management Controller for PowerEdge VRTX RACADM Command Line Reference Guide available at dell.com/
support/manuals.
• Run the RACADM racreset command on the active CMC. See the racreset command section in the
Chassis Management Controller for PowerEdge VRTX RACADM Command Line Reference Guide available at
dell.com/support/manuals..
• Reset the active CMC from web interface. See the Reset CMC option for Power Control Operations that is
described in Executing Power Control
• Remove the network cable from the active CMC.
• Remove the active CMC from the chassis.
• Initiate a CMC firmware flash on the active CMC.
• Have an active CMC that is no longer functional.
NOTE: In the event of a CMC failover, all iDRAC connections and all active CMC sessions are logged off.
Users with logged-off sessions must reconnect to the new active CMC.

About Standby CMC

The standby CMC is identical to and is maintained as a mirror of the active CMC. The active and standby CMCs must
both be installed with the same firmware revision. If the firmware revisions differ, the system reports as "redundancy
degraded".
The standby CMC assumes the same settings and properties of the active CMC. You must maintain the same firmware
version on both the CMCs, but you do not have to duplicate configuration settings on the standby CMC.
NOTE: For information about installing a CMC, see the
firmware on your standby CMC, see
36
n = 1-4
Operations.
Updating Firmware.
operation value is blink or unblink, and the
VRTX Owner's Manual . For instructions about installing CMC
Chassis