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Network Management Card User’s Guide 40
Device Manager Menus
PowerChute® (UPS PowerChute network shutdown)
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Maximum-
Shutdown-Time
negotiation
The
Maximum Shutdown Time
setting provides the delay needed to
make sure that a server will have enough time to shut down safely when
a graceful shutdown is initiated by the Management Card or by
PowerChute network shutdown client at the server.
Note: For information about the
Turn UPS Off Gracefully
,
Reboot UPS
Gracefully
, and
Put UPS To Sleep Gracefully
options that use
this delay, see UPS Control on page 33.
The time reported by the
Maximum Shutdown Time
setting represents
the maximum delay needed by at least one of the servers listed in the
Configured Client IP Addresses
list. This time is determined by a
negotiation process that is initiated when any of the following occurs:
• The Management Card turns on (a System: Coldstart event).
• The Management Card is reset (a System: Warmstart event).
• You select
Force negotiation
from the
Maximum Shutdown
Time
setting’s drop-down menu, and click
Apply
.
During the negotiation process, which can take up to 10 minutes to
perform, each of the servers listed in the
Configured Client IP
Addresses
list is contacted to determine the shutdown delay needed by
each server. At the end of this process, the delay time defined by the
Maximum Shutdown Time
setting will be changed, if necessary, to
reflect the highest delay time reported by the servers. For example, if
3
minutes
was the
Maximum Shutdown Time
setting determined during
the last negotiation process, and a new server has been added to the
Configured Client IP Addresses
list that requires a 4-minute shutdown
delay,
4 minutes
will be the
Maximum Shutdown Time
setting at the
end of the new negotiation process. Conversely, if none of the servers
need more than a 2-minute delay,
2 minutes
will be the
Maximum
Shutdown Time
setting.
Note: To view a flowchart presentation of the negotiation process, see
the PCNS Maximum Shutdown Time Negotiation.pdf file
provided in the .\trouble\ directory on the APC Network
Management Card utility CD. The .\trouble\ directory also has
two other flowchart presentations that relate to PowerChute
network shutdown: PCNS Shutdown Behavior.pdf and PCNS
Low-Battery Shutdown Behavior.pdf.