Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 83)

Multi-Service IronWare Administration Guide 65
53-1003028-02
Switch fabric fault monitoring
2
NOTE
You must restart the device for automatic SFM shutdown to take effect.
Once you have configured automatic SFM shutdown on the device and restarted it, the
management module will automatically detect access failure (see
“Access failure messages” on
page 66) and shut down the unresponsive SFM. You can restart the SFM at any time (manually, by
removing and re-inserting the module, or by initiating a system restart), but if another access error
is detected, the management module will shut the SFM down again. If an SFM is automatically
powered down, SFM power-off status (and the associated reason) are synced to the standby
management module, and in the event of failover the standby module will keep the faulty SFM
powered off.
Auto-tune enhancement
The RAS feature set is extended with automatic monitoring and tuning of transmit and receive
parameters on SERDES links between line modules and switch fabric modules that are down due
to excessive CRC errors. Tuning is done on both the line module and switch fabric module i.e. both
ends of the the link, at the same time.
If tuning fails on the switch fabric module then the sysmon fe link action configuration defines the
action taken i.e. a syslog message is generated or the link is shut down and a syslog message is
generated. If the link has already been tuned and goes down a second time, then the link is
powered down and a syslog message generated.
Auto-tune is enabled by default on MLXe-16 and MLXe-32 chassis. This enhancement is not
needed on MLXe-4 and MLXe8 chassis, because the CRC error condition does not occur on these
chassis.
Example
To disable auto-tuning on FE for slow or burst CRC errors, enter the following command:
Brocade(config)# no sysmon fe link auto-tune
To enable auto-tuning again, use the following command:
Brocade(config)# sysmon fe link auto-tune
Syntax: [no] sysmon fe link auto-tune
To disable auto-tuning on TM for slow or burst CRC errors, enter the following command:
Brocade(config)# no sysmon tm link auto-tune
To enable auto-tuning again, use the following command:
Brocade(config)# sysmon tmlink auto-tune
Syntax: [no] sysmon tm link auto-tune
Switch fabric log messages
Information about the state of each switch fabric module and whether it can be accessed by the
Management Module is also provided in the form of syslog messages.