HP StorageWorks XPath OS 7.4.X Command Reference Guide (AA-RVHCC-TE, September 2005)

XPath OS 7.4.x command reference guide 195
Tests the wire-side transmitting and receiving paths of one or more ports.
Synopsis
portloopbacktest [-p port_list] [-n frame_count] [-l length] [-s speed]
[-m mac] [-b loopback]
Availability
admin
Description
Use this command to test the wire-side operation of one or more ports. This test generates frames from a
port and loops them back to itself. The loopback path can be either internal or external.
Each participating port is both a frame producer and a frame consumer. The transmitting and receiving
operations happen in parallel. The transmitter attempts to send out frames, independent of the status of the
receiver.
All ports involved in the test must be diagnostics-enabled prior to running this test.
Operands
This command has the following operands:
portLoopbackTest
-p port_list Specifies a list of source ports. The default value is all ports.
-n frame_count Specifies the number of frames to send to each destination. The
default value is 256.
-l length Specifies the payload length of the test frames. The default value
is 1024.
-s speed Specifies Fibre Channel speed mode. The default value is 2 Gb.
0 Autonegotiate
1 1 Gb
2 2 Gb
-m mac Specifies the MAC layer to activate. The default is Fibre Channel.
0 Fibre Channel
1 Gigabit Ethernet
-b loopback Specifies the loopback mode. The default is internal loopback.
0 Internal loopback through the
serializer/deserializer (SERDES)
1 External loopback through loopback plug or
fiber