Extreme Networks ExtremeWare Version 7.8, Руководство по устранению неисправностей

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Transceiver Diagnostics
Advanced System Diagnostics and Troubleshooting Guide 83
To configure the transceiver diagnostic threshold and window values, use these commands:
• To configure the number of 20-second periods (windows) within which the configured number of
errors can occur, use this command:
configure transceiver-test window <1-8>
where
window
specifies the number of 20-second periods (windows) within which the configured
number of errors can occur. The
window
value is a number in the range from 1 to 8. If you do not
specify a value, the test uses the default of 8 windows.
NOTE
This configuration command provides a sliding observation window. For example, using the default
window value of 8, the diagnostic checks for errors within the eight previous 20-second windows.
• To configure the number of transceiver test errors the system-health-check accepts before taking
action, use this command:
configure transceiver-test threshold <1-8>
where
threshold
specifies the number of failures within the number of windows specified in the
configure transceiver-test window
command. The threshold value is a number in the range
from 1 to 8. If you do not specify a value, the test uses the default of 3 errors.
NOTE
Extreme Networks recommends against changing the default transceiver test threshold value. The
default value of 3 errors is adequate for most networks.
• To configure the action the system health check takes when too many transceiver test failures are
detected within the specified transceiver test window, use this command:
configure transceiver-test failure-action [log | sys-health-check]
If you specify the
log
option, and no auto-recovery option was specified using the
configure sys-health-check
command, the response to transceiver diagnostic failures is to log
one instance of the failure message.
If you specify the
sys-health-check
option, and an
auto-recovery
option was specified using the
configure sys-health-check
command, the response to transceiver diagnostic failures is to take
whatever action the system health check is configured to perform.
System Impacts of the Transceiver Diagnostics
Because of the way the diagnostics operate, a negligible amount of system latency might occur. The
frequency and number of test messages is extremely small in comparison to the capacity of the
communication path being tested. Impact should only be experienced in switches with extremely high
bandwidth use, in which case, the test frequency may be reduced. Threshold windows can also be
configured to customize behavior to specific network environments.
Network Impact of the Transceiver Diagnostics
Impact on network traffic is negligible. There might be some impact if sys-health-check has been
selected and the configured threshold for the transceiver test is exceeded. The impact depends on the
way the system-health-check feature is configured.