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
21-115
Cisco MDS 9000 Family Command Reference
OL-18089-01, Cisco MDS NX-OS Release 4.x
Chapter 21 S Commands
system health internal-loopback
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.
system health internal-loopback interface
{
fc
slot
/
port |
iscsi
slot
/
port
}
[
frame-length
bytes
[
frame-count
number] |
frame-count
number
]
Note
On a Cisco Fabric Switch for HP c-Class BladeSystem and on a Cisco Fabric Switch for IBM
BladeCenter, the syntax differs as follows:
interface
{
bay
port
| ext
port
}
Syntax Description
Defaults
The loopback is disabled.
The frame-length is 0. The frame-count is 1.
Command Modes
EXEC mode.
Command History
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.
interface
Configures an interface.
fc
slot
/
port
(Optional) Configures the Fibre Channel interface specified by the slot
and port on an MDS 9000 Family switch.
iscsi
slot
/
port
(Optional) Specifies the iSCSI interface to configure by slot and port on
an MDS 9000 Family switch.
bay
port
| ext
port
(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.
frame-length
bytes
Configures the specified length of the loopback test frame in bytes. The
range is 0 to 128 bytes.
frame-count
number
Configures the specified number of frames for the loopback test. The
number of frames can range from 1 to 32.
Release
Modification
1.3(4)
This command was introduced.
3.0(1)
Added the
frame-count
and
frame-length
options.
3.1(2)
Added the
interface bay | ext
option.