Extreme Networks ExtremeWare 7.5, Command Reference Manual

Page: 761 / 2546

enable sys-health-check
ExtremeWare 7.5 Command Reference Guide 761
enable sys-health-check
enable sys-health-check
Description
Enables the BlackDiamond system health checker.
NOTE
This command is available only on the BlackDiamond switches.
Syntax Description
This command has no arguments or variables.
Default
Enabled
Usage Guidelines
The system health checker tests I/O modules, MSM modules, and the backplane by forwarding packets
every 4 seconds. Additional checking for the validity of these packets is completed by performing a
checksum.
By isolating faults to a specific module, MSM, or backplane connection, the system health checker
prevents corrupted packets from being propagated to the CPU, upper layer modules, or the rest of your
network. If you observe a failure, please contact Extreme Technical Support.
Depending on how you have configured the system health checker, failed system health checks may
generate critical error messages in the syslog, and may also send a trap and/or shut down the system.
The system health checker will continue to periodically forward test packets to failed components. If
auto-recovery is configured, the system will attempt to automatically reset the faulty module and bring
it back online.
In ExtremeWare versions prior to 6.2, you cannot use both mirroring and the system health checker at
the same time. If you configure mirroring with the system health checker enabled, the health checker
will indicate that it has been disabled by sending a message to the syslog. In version 6.2 or later, this
restriction does not apply.
To configure the health checker, use the following command:
configure sys-health-check [alarm-level [card-down | default | log | system-down |
traps] | auto-recovery <number of tries>]
The alarm-level and auto-recovery options are mutually exclusive; configuring an alarm-level disables
auto-recovery, and configuring auto-recovery overrides the alarm-level setting.
Example
The following command enables the BlackDiamond system health checker:
enable sys-health-check