Users Guide

• IP address blocking
• Number of login attempts allowed
• Timespan for the lockout failure counts to occur
• Lockout penalty time
• To enable user blocking feature, use:
racadm config -g cfgRacTuning -o cfgRacTuneUserBlkEnable <0|1>
• To enable IP blocking feature, use:
racadm config –g cfgRacTuning –o cfgRacTuneIPBlkEnable <0|1>
• To specify the number of login attempts, use:
racadm config –g cfgRacTuning –o cfgRacTuneIpBlkFailCount
• 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:
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