System Health Internal-Loopback - Cisco AJ732A - MDS 9134 Fabric Switch Command Reference Manual

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

system health internal-loopback

To explicitly run an internal Online Health Management System (OHMS) loopback test on demand
(when requested by the user) for a specified interface or module, use the system health
internal-loopback command.
On a Cisco Fabric Switch for HP c-Class BladeSystem and on a Cisco Fabric Switch for IBM
Note
BladeCenter, the syntax differs as follows:
interface {bay port | ext port}
Syntax Description interface
fc slot/port
iscsi slot/port
bay port | ext port
frame-length bytes
frame-count number
Defaults The loopback is disabled.
The frame-length is 0. The frame-count is 1.
Command Modes EXEC mode.
Command History Release
1.3(4)
3.0(1)
3.1(2)
Usage Guidelines
Internal loopback tests send and receive FC2 frames to and from the same ports and provide the round
trip time taken in microseconds for the Fibre Channel interface.
OL-18089-01, Cisco MDS NX-OS Release 4.x
system health internal-loopback interface {fc slot/port | iscsi slot/port} [frame-length bytes
[frame-count number] | frame-count number]
Modification
This command was introduced.
Added the frame-count and frame-length options.
Added the interface bay | ext option.
Configures an interface.
(Optional) Configures the Fibre Channel interface specified by the slot
and port on an MDS 9000 Family switch.
(Optional) Specifies the iSCSI interface to configure by slot and port on
an MDS 9000 Family switch.
(Optional) Configures the Fibre Channel interface on a Cisco Fabric
Switch for HP c-Class BladeSystem or on a Cisco Fabric Switch for
IBM BladeCenter . The range is 0 to 48.
Configures the specified length of the loopback test frame in bytes. The
range is 0 to 128 bytes.
Configures the specified number of frames for the loopback test. The
number of frames can range from 1 to 32.
system health internal-loopback
Cisco MDS 9000 Family Command Reference
21-115