3Com VCX V7000 Maintenance Manual page 139

Table 11 VCX Server Behavior for Power Events (continued)
Event
Final Shutdown
Power Restoration
Power Restoration
During Shutdown
Unable to Contact
UPS
VCX Server Response to Power Events
Response
The UPS receives a signal to turn off after a time delay (the
default is 270 seconds) to allow for the last shutdown steps
to complete.
The VCX system generates a trap indicating that shutdown
in imminent.
If multiple VCX servers are powered from the same UPS, all
servers are provided sufficient time to complete their
individual shutdown operations.
Each VCX server attempts to confirm receipt of the
shutdown command from the UPS. If the shutdown
command is not received, a VCX server tries to resend the
signal 3 times before proceeding to complete the shutdown.
If signalling fails (for example, because of network
connectivity issues during the shutdown sequence), the VCX
server tries to send a trap. The server receives power (but in a
halted state) until the UPS battery is exhausted and the UPS
turns itself off.
When power returns, each VCX server:
Boots and begins to provide service.
■
Generates a trap indicating system startup.
■
If power is restored after a VCX server as begun final
shutdown sequence, but before the shutdown has
completed, the server completes the shutdown and signals
the UPS to turn off. The UPS turns off, then back on
automatically, and the server restarts.
If a VCX server is configured for UPS monitoring but is
unable to contact a configured UPS, a trap is generated to
indicate that UPS monitoring is not occurring. The server
continues to operate normally and periodically retries to
contact the UPS. If the UPS subsequently becomes reachable,
a trap is generated indicating that the error condition has
been cleared.
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