648 ExtremeWare Software 7.3.0 Command Reference Guide
Commands for Status Monitoring and Statistics
configure sys-health-check alarm-level
configure sys-health-check alarm-level [log | system-down | traps | default
| auto-recovery <number of tries> [online | offline]]
Description
Configures the system health checker.
Syntax Description
Default
The default alarm level is log.
Usage Guidelines
This command allows you to configure the switch’s reaction to a failed health check.
The system health checker tests I/O modules, SMMi 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, SMMi, 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.
log Posts a CRIT message to the log.
system-down Posts a CRIT message to the log, sends a trap, and turns off the system.
traps Posts a CRIT message to the log and sends a trap.
default Resets the alarm level to log.
auto-recovery Specifies the number of times that the health checker attempts to
auto-recover. The range is from 0 through 255 times. Default is 3 times.
Applies only to BlackDiamond I/O modules.
offline Specifies that a faulty Summit switch or Alpine module is taken offline and
kept offline if one of the following occurs:
• More than eight defects are detected.
• Three consecutive checksum errors were detected by the health checker,
but no new defects were found by the memory scanning and mapping
process.
• After defects were detected and mapped out, the same checksum errors
are again detected by the system health checker.
online Specifies that a faulty module is kept online, regardless of how many errors
are detected.
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