HP StorageWorks 2.32 Edge Switch - Manual (Page 152)

Using maintenance features 152
Running port diagnostics
The Port Diagnostics option enables you to run internal and external loopback tests on any port or
on all ports on a port card. At the start of the loopback test, the port or port card can be online, off
line, blocked, or unblocked
• Internal loopback test —An internal loopback test checks port circuitry, but does not check
fiber optic components of a port transceiver. The test is performed with a device attached to the
port, momentarily blocks the port and is disruptive to the attached device.
An optical transceiver (SFP or XFP) must be installed in the port during the test. This device can
remain connected during the test.
• External loopback test —An external loopback test checks port circuitry, including fiber
optic components of a port transceiver. To perform the test, the attached device must be
acquiesced and disconnected from the port, and a multimode or singlemode loopback plug
must be inserted in the port receptacle.
To run port diagnostics, follow the detailed steps in the appropriate service manual for your Edge
Switch.
Swapping ports
Use this dialog box to swap one port address for another regardless of the Management Style
selected. An asterisk is used to indicate port addresses that have been swapped using the Swap
Ports option. This asterisk displays after the port number in the Configure Ports dialog box, Port List
View and Node List View. In the Allow/Prohibit Matrix dialog box the asterisk displays after the port
address, since the port number does not display on this dialog box.
Swap Ports uses port addresses, not port numbers. Therefore, when you swap ports, the port
address is swapped, not the port number. For example, if the current address for port 0 is 04 and
the current address for port 1 is 05, you can swap so that port 0 has address 05 and port 1 has
address 04.
The port address displays the 3-byte Fibre Channel address. The hexadecimal port address is the
middle (area) byte of the three and is displayed in bold. In cases where the switch or director is
offline, the domain (first) byte and the node4 (last) byte are unknown to the element manager. A
double-question mark is displayed to replace the unknown bytes. The port address (middle) byte is
always displayed. The middle byte is displayed in bold if the FC Address is displayed. For example,
where the domain and node bytes of the FC Address are not known and irrelevant, the address field
for the physical port 00 is displayed as ??00??.
To swap ports: