Fabric OS Reference Manual

Telnet Commands 49
crossPortTest
Functional test of port M->N path.
Synopsis
crossPortTest [passCount, singlePortAlso]
Availability admin
Description Use this command to verify the functional operation of the switch. This
command verifies operation by sending frames from the port M transmitter
and looping the frames back through an external fiber cable into another
port N receiver. This exercises all the switch components from the main
board to the GBIC, from the GBIC to the fiber cable, from the fiber cable to
the GBIC, and from the GBIC back to the main board.
The cables can be connected to any port combination as long as the cables
and GBICs connected are of the same technology – a short wavelength
GBIC port is connected to another short wavelength GBIC port using a
short wavelength cable, a long wavelength port is connected to a long
wavelength port, and a copper port is connected to a copper port.
For complete testing, connected ports should be from different ASICs.
Ports 0-3 are assigned to ASIC 0, ports 4-7 are assigned to ASIC 1, etc. A
connection from port 0 to port 15 exercises the transmit path between
ASICs. A connection from port 0 to port 3 tests only the internal transmit
path in ASIC 0.
Only one frame is transmitted and received at a given time, and the port
LEDs flicker green while the test is running.
The test method consists of nine steps:
1. Determine port connections.
2. Enable ports for cabled loopback mode.
3. Create a frame F with a maximum data size (2112 bytes).
4. Transmit frame F through port M.
5. Pick up the frame from its cross-connected port N. Complain if a port
other than N actually received the frame.