Cisco MDS 9124 - Fabric Switch Reference page 1017

Chapter 21 S Commands
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
Usage Guidelines Use this command to run this test on demand for the external devices connected to a switch that are part
of a long haul network.
Examples
The following example displays an external loopback command for a Fibre Channel interface.
switch# system health external-loopback interface fc 3/1
This will shut the requested interfaces Do you want to continue (y/n)? [n] y
External loopback test on interface fc3/1 was
The following example displays the effect of the force option when implementing a forced loopback.
switch# system health external-loopback interface fc 3/1 force
External loopback test on interface fc3/1 was
Related Commands Command
system health
system health
internal-loopback
system health
serdes-loopback
OL-16217-01, Cisco MDS SAN-OS Release 3.x
Description
Configures Online Health Management System (OHMS) features for a
specified interface or for the entire switch.
Explicitly runs an internal OHMS loopback test on demand for a specified
interface or module.
Explicitly runs an internal OHMS Serializer/Deserializer (Serdes) loopback
test on demand for a Fibre Channel interface.
system health external-loopback
successful.
successful.
Cisco MDS 9000 Family Command Reference
21-99