HP Fibre Channel Fabric Migration Guide

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Fabric Migration Guide
Fabric Device Addressing Changes
CAUTION Do not configure switches with a domain of 8. This configuration is
unsupported and will not work. HP systems reserve domain 8 for Private
Loop devices.
• The fabric configuration now contains an iotree node of 0/1/2/0.1
described as FCP Domain. A node of this type will be built for each
domain the fabric contains. (Domains generally correspond one to one
with a physical instance of a switch).
• The FCP Array Interface iotree node has changed from
0/1/2/0.8.0.11.0 to 0/1/2/0.1.19.0.0. The address is still at
hardware path 0/1/2/0, but the next three elements of the path,
which represent the N_Port ID, have changed. The old N_Port ID of
8.0.11 uses the reserved domain of 8 and area of 0. In this case, the
HPA or Port portion of the N_Port ID is 11. In the fabric iotree, the
new N_Port ID is 1.19.0. This N_Port ID corresponds to the
following:
— domain ID of 1 = Brocade switch #1
— area ID of 19 = port 3
— port ID of 0 = Direct Fabric Attach
In the ioscan example, the area ID is 19. The switch will show a
hexadecimal value of “1x” because it has a fixed “1” in the upper four
bits of the area field (0001xxxx). However, ioscan shows a decimal
value for this field. Therefore, you must subtract decimal 16 from the
number 19 to get the actual port number, which is 3.
For most switches, the domain ID generally will map to a switch. An
area ID will map to a physical connector on the switch. This mapping
may not be a direct numerical correlation; that is, physical port “3”
may map to an area ID other than “3,” depending on the decimal
value shown in this field.
If the switch port is an F_Port (Direct Fabric Attach), the port ID is
set to 0. If the switch port is an FL_Port, the port ID is set to the
AL_PA associated with the Hard Physical Address or loopidentifier of
a Fibre Channel target for public loop devices. The AL_PA is then
used as the Port portion of the iotree address.