Cisco MDS 9000 Series Command Reference

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Cisco MDS 9000 Family Command Reference
OL-8413-07, Cisco MDS SAN-OS Release 3.x
Chapter 21 S Commands
system health (Configuration mode)
Usage Guidelines If you do not configure the loopback frequency value, the default frequency of 5 seconds is used for all
modules in the switch.
Note The no form of the command is not supported for the frame-length, auto, and frequency options.
Examples The following example disables OHMS in this switch.
switch# config terminal
switch(config)# no system health
System Health is disabled.
The following example enables (default) OHMS in this switch.
switch(config)# system health
System Health is enabled.
The following example enables OHMS in this interface.
switch(config)# no system health interface fc8/1
System health for interface fc8/13 is enabled.
The following example disables OHMS in this interface.
switch(config)# system health interface fc8/1
System health for interface fc8/13 is disabled.
The following example configures the loopback frequency to be 50 seconds for any port in the switch.
switch(config)# system health loopback frequency 50
The new frequency is set at 50 Seconds.
The following example configures the loopback frame-length to auto.
switch(config)# system health loopback frame-length auto
Loopback frame-length auto-size mode is now enabled.
The following example prevents the switch from taking any failure action.
switch(config)# system health failure-action
System health global failure action is now enabled.
The following example prevents the switch configuration from taking OHMS action (default) in case of
a failure.
switch(config)# no system health failure-action
System health global failure action now disabled.
Related Commands Command Description
system health
external-health
Explicitly runs an external Online Health Management System (OHMS)
loopback test on demand for a specified interface or module.
system health
internal-loopback
Explicitly runs an internal OHMS loopback test on demand for a specified
interface or module.
system health
serdes-loopback
Explicitly runs an internal OHMS Serializer/Deserializer (Serdes) loopback
test on demand for a Fibre Channel interface.

Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available