Brocade Communications Systems NetIron MLXe Series Hardware Installation Manual page 74

Router modules
Software sends a syslog/trap when auto-tuning is started and completed. This feature will utilize existing slow rate CRC auto tuning
syslog and SFM logs.
In the case where slow rate CRCs are encountered, triggering fabric link monitoring, the CRC error counter of each link is polled for every
monitoring period as follows:
• If the total CRC errors in monitoring period pass, slow rate CRC monitoring will start auto-tuning that particular link, instead of
shutting down the link.
• If the tuning algorithm returns an error, or if the software attempts to start auto-tuning links that are already-tuned, software
performs one of the following actions:
– Link is powered down, sending a syslog and trap.
– Link is not powered down, sending a syslog and trap (depending on the sysmon link configuration).
In slow rate CRC monitoring, link monitoring polls the CRC error counter of each link for every monitoring period. If the total CRC errors
in monitoring period pass, link monitoring will start auto-tuning that particular link instead of shutting down the link.
Auto-tuning CLI commands
This topic covers the steps for executing the sysmon fe auto-tune and sysmon tm auto-tune for enabling or disabling auto-
tuning on FE and TM for burst CRC.
Log into your system.
The following CLI steps will enable or disable auto-tuning on FE and TM for burst CRC.
1. Execute the CLI command [no] sysmon fe auto-tune.
device(config)#sysmon fe auto-tune
Event type already enabled.
Enables or disables auto-tuning on FE for burst CRC.
NOTE
Default: Enabled.
2. Execute the CLI command [no] sysmon tm auto-tune.
device(config)#sysmon tm auto-tune
Event type already enabled.
Enables or disables auto-tuning on TM for burst CRC.
NOTE
Default: Enabled.
The following example demonstrates the CLI command necessary to execute the sysmon fe auto-tune command for enabling high
rate auto-tuning on FE for burst CRC.
devicedevice# sysmon fe auto-tune
The following example demonstrates the CLI command necessary to execute the no sysmon fe auto-tune command for disabling
high rate auto-tuning on FE for burst CRC.
device# no sysmon fe auto-tune
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Brocade NetIron MLXe Series Hardware Installation Guide
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