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ManualsBrandsDell ManualsActive System ManagerChassis Management Controller Version 3.10 For Dell PowerEdge VRTX
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Table Of Contents
• To specify the time span within which, lockout fail count failures must occur, use:
racadm config –g cfgRacTuning –o cfgRacTuneIpBlkFailWindow
• To specify value for lockout penalty time, use:
racadm config –g cfgRacTuning –o cfgRacTuneIpBlkPenaltyTime
For more information about these objects, see the Chassis Management Controller for PowerEdge VRTX RACADM Command Line
Reference Guide available at dell.com/support/manuals.
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 Chassis 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 Operations.
• Remove the network cable from the active CMC.
• Remove the active CMC from the chassis.
• Initiate a CMC rmware ash 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 o. Users with logged-
o 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 rmware revision. If the rmware revisions dier, the system reports as “redundancy degraded”.
The standby CMC assumes the same settings and properties of the active CMC. You must maintain the same rmware version on both the
CMCs, but you do not have to duplicate conguration settings on the standby CMC.
NOTE
: For information about installing a CMC, see the
VRTX Owner’s Manual
. For instructions about installing CMC rmware on
your standby CMC, see Updating Firmware.
CMC Failsafe Mode
The PowerEdge VRTX enclosure enables the fail-safe mode to protect the servers and I/O module from not functioning. The fail-safe
mode is enabled when a CMC is not in control of the chassis. During the CMC failover period, or during a single CMC management loss:
• You cannot turn on the newly installed servers.
• You cannot remotely access existing servers.
• Server performance reduces to limit power consumption until management of the CMC is restored.
The following are some of the conditions that can result in CMC management loss:
• CMC removal — Chassis management resumes after replacing CMC, or after failover to standby CMC.
• CMC network cable removal or network connection loss — Chassis management resumes after the chassis fails over to the standby
CMC. Network failover is only enabled in redundant CMC mode.
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Installing and Setting Up CMC