Extreme Networks ExtremeWare 7.0.0, Справочник по командам

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config sys-health-check alarm-level
ExtremeWare Software 7.0.0 Command Reference Guide 515
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 ExtremeWare 6.2 or later,
this restriction does not apply.
The
auto-recovery
option configures the number of times the system health checker attempts to
automatically reset a faulty module and bring it online. If the system health checker fails more than the
configured number of attempts, it sets the module to card-down.
In ExtremeWare 6.2.1 or later, when auto-recovery is configured, the occurrence of three consecutive
checksum errors will cause the packet memory (PM) defect detection program to be run against the
I/O module. Checksum errors may include internal and external MAC port parity errors, EDP
checksum errors, and CPU packet or diagnostic packet checksum errors. If defects are detected, the card
is taken offline, the memory defect information is recorded in the card EEPROM, the defective buffer is
mapped out of further use, and the card is returned to operational state. A maximum of 8 defects can
be stored in the EEPROM.
After the PM defect detection and mapping process has been run, a card is considered failed and is
taken offline in the following circumstances:
•
More than eight defects are detected.
• Three consecutive checksum errors were detected by the health checker, but no new PM defects
were found by the PM defect detection process.
• After defects were detected and mapped out, the same checksum errors are again detected by the
system health checker.
The auto-recovery repetition value is ignored in these cases. In any of these cases, please contact
Extreme Technical Support.
If you specify the
online
option, the module is kept online, but the following error messages are
recorded in the log:
<WARN:SYST> card_db.c 832: Although card 2 is back online, contact Tech. Supp. for
assistance.
<WARN:SYST> card_db.c 821: Card 2 has nonrecoverable packet memory defect.
To view the status of the system health checker, use the
show diag
command.
To enable the health checker, use the
enable sys-health-check
command.
To disable the health checker, use the
disable sys-health-check
command.
The alarm-level
system-down
option is especially useful in an ESRP configuration where the entire
system is backed by an identical system. By powering down the faulty system, you ensure that erratic
ESRP behavior in the faulty system does not affect ESRP performance and ensures full system failover
to the redundant system.
If you are using ESRP in your configuration, any system health check failure will automatically reduce
the ESRP priority of the system to the configured failover priority. This allows the healthy standby
system to take over ESRP and become responsible for handling traffic.
I/O module faults are permanently recorded on the module’s EEPROM. A module that has failed a
system health check cannot be brought back online.
To view the failure messages, use the
show diag
command.