Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 136)

118 Multi-Service IronWare Administration Guide
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Port CRC error monitoring test
5
Port CRC error monitoring test
This section discusses the following topics:
• Port CRC error monitoring overview
• Port CRC error monitoring: basic configuration
Port CRC error monitoring overview
The port CRC error monitoring test is a background diagnostic test which monitors each port and
checks if the number of packets with CRC errors (MAC CRC error eounter) exceeds a pre-configured
limit. This limit or threshold is configured as the number of CRC errors occurring over the polling
interval of the diagnostic test. If the test fails on a port for more than a configured threshold, a
diagnostic action, if enabled, will be triggered. The diagnostic action can be configured to disable
the port where the CRC errors exceed the configured threshold.
The threshold for diagnostic action, is configured as the ratio of the number of test failures to the
number of diagnostics tests run. For example, if the threshold is set to three failures out of five
diagnostic test runs, then the diagnostic action, when enabled, will be triggered if the test fails
three times in five consecutive diagnostic tests.
A syslog is generated every time a port CRC error monitoring test fails. A syslog message is also
generated after a port is disabled in a port CRC error diagnostic action.
NOTE
Optionally, syslogs can be disabled , before they are logged again, for a specific number of events
(refer to
“Configuring ‘log-backoff ‘ for the port CRC error monitoring test” ). This applies to the syslog
which is sent after the port CRC error monitoring test fails, but not to the syslog sent after a port is
disabled. When a port is disabled in the port CRC error diagnostic action, a syslog will be logged to
notify the user of the port state change irrespective of this command.
Port CRC error monitoring: basic configuration
By default the:
• Port CRC error monitoring is enabled
• Port CRC error monitoring test diagnostic action is set to syslog i.e. a syslog message is
generated when port CRC errors exceed the configured threshold.
Configuring the port CRC error monitoring test
1. Configure the port CRC error counter limit.
2. Configure the polling period for the test.
3. Configure the threshold to trigger diagnostic action
Example
To configure the port CRC error counter limit to 20, enter the following command:
Brocade(config)# sysmon port port-crc-test counter port-crc-counter less-than 20
Syntax: sysmon port port-crc-test counter port-crc-counter less-than crc-count