•
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 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
VRTX Owner’s Manual
. For instructions about installing CMC
firmware on your standby CMC, see
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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