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Chapter 50
Monitoring System Processes and Logs
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
System Health Inititation
By default, the system health feature is enabled in each switch in the Cisco MDS 9000 Family.
To disable or enable this feature in any switch in the Cisco MDS 9000 Family, follow these steps:
Command
Step 1
switch# config terminal
switch(config)#
Step 2
switch(config)# no system health
System Health is disabled.
switch(config)# system health
System Health is enabled.
Step 3
switch(config)# no system health interface fc8/1
System health for interface fc8/13 is disabled.
switch(config)# system health interface fc8/1
System health for interface fc8/13 is enabled.
Loopback Test Configuration Frequency
Loopback tests are designed to identify hardware errors in the data path in the module(s) and the control
path in the supervisors. One loopback frame is sent to each module at a preconfigured frequency—it
passes through each configured interface and returns to the supervisor module.
The loopback tests can be run at frequencies ranging from 5 seconds (default) to 255 seconds. If you do
not configure the loopback frequency value, the default frequency of 5 seconds is used for all modules
in the switch. Loopback test frequencies cannot be altered for each module. The configured value is
constant for all modules.
To configure the frequency of loopback tests for all modules in any switch in the Cisco MDS 9000
Family, follow these steps:
Command
Step 1
switch# config terminal
switch(config)#
Step 2
switch(config)# system health loopback
frequency 50
The new frequency is set at 50 Seconds.
Hardware Failure Action
The failure-action command controls the Cisco SAN-OS software from taking any action if a hardware
failure is determined while running the tests.
By default, this feature is enabled in all switches in the Cisco MDS 9000 Family—action is taken if a
failure is determined and the failed component is isolated from further testing.
Failure action is controlled at individual test levels (per module), at the module level (for all tests), or
for the entire switch.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Online System Health Management
Purpose
Enters configuration mode.
Disables system health from running tests in
this switch.
Enables (default) system health to run tests
in this switch.
Disables system health from testing the
specified interface.
Enables (default) system health to test for
the specified interface.
Purpose
Enters configuration mode.
Configures the loopback frequency to 50 seconds.
The default loopback frequency is 5 seconds. The
valid range is from 5 to 255 seconds.
Cisco MDS 9000 Family Configuration Guide
50-11
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