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
21-120
Cisco MDS 9000 Family Command Reference
OL-18089-01, Cisco MDS NX-OS Release 4.x
Chapter 21 S Commands
system health serdes-loopback
system health serdes-loopback
To explicitly run an internal Online Health Management System (OHMS) Serializer/Deserializer
(Serdes) loopback test on demand (when requested by the user) for a Fibre Channel interface, use the
system health serdes-loopback
command.
system health serdes-loopback interface fc
slot/port
[
frame-length
bytes
[
frame-count
number
]
| frame-count
number
] [
force
]
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
Loopback is disabled.
The frame-length is 0. The frame-count is 1.
Command Modes
EXEC mode.
Command History
Usage Guidelines
None.
Examples
The following example performs a Serdes loopback test within ports for an entire module.
switch#
system health serdes-loopback interface fc 4/1
interface
Configures an interface.
fc
slot
/
port
(Optional) Configures the Fiber Channel interface specified by the 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.
force
Directs the software to use the non-interactive loopback mode.
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
3.0(1)
This command was introduced.
3.1(2)
Added the
interface bay | ext
option
.