User Manual

Stacking
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M4200 and M4300 Series ProSAFE Managed Switches Web Management User Manual
6. Use the Admin Status radio button to enable or disable the NSF feature on the stack.
When enabled, the stack selects a backup unit. Applications on the management unit copy
data to the backup unit.
7. To cause the supervisor unit to fail over to the backup blade, click the Initiate Failover
button on the top right corner of the page.
8. To refresh the page with the latest information on the switch, click the Update button.
The following table describes the nonconfigurable NSF Summary data that is displayed.
Table 64. NSF Summary
Field Description
Operational Status Indicates whether NSF is enabled on the chassis. NSF is enabled
by default.
Last Startup Reason The type of activation that caused the software to start the last
time. The possible values are as follows:
• Power On. The switch is rebooted. A power cycle or an
administrative reload command might caused this
• Cold Admin Move. The system resets all hardware tables
without a reboot and the application begins from a
pre-initialized state, but no data is retained from before the
failover.
• Warm Admin Move. The administrator issued a command for
the standby manager to take over.
• Auto Warm. The primary management card restarted due to a
failure, and the system executed a nonstop forwarding failover.
• Auto Cold. The system switched from the active manager to
the backup manager and could not maintain user data traffic.
This is usually caused by multiple failures occurring close
together.