Converting Port Number To Area Id - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

Before changing the PID format, determine if host reboots will be necessary. The section
page 464 summarizes the situations that may require a reboot.
switch:admin> switchdisable
switch:admin> configure
Configure...
Fabric parameters (yes, y, no, n): [no] y
Domain: (1..239) [1]
BB credit: (1..27) [16]
R_A_TOV: (4000..120000) [10000]
E_D_TOV: (1000..5000) [2000]
WAN_TOV: (1000..120000) [0]
Data field size: (256..2112) [2112]
Sequence Level Switching: (0..1) [0]
Disable Device Probing: (0..1) [0]
Suppress Class F Traffic: (0..1) [0]
SYNC IO mode: (0..1) [0]
Switch PID Address Mode: (0..2) [1] < Set mode number here.
Per-frame Route Priority: (0..1) [0]
Long Distance Fabric: (0..1) [0]

Converting port number to area ID

Except for the following cases, the area ID is equal to the port number:
• When you perform a port swap operation.
• When you enable Extended Edge (also known as "displaced PID") PID on the director.
If you are using Extended Edge PID format (for example, the 4/256 SAN Director with configuration option
5) and would like to map the output of the port number to the area ID, use the following formula (for ports
0–127):
a = (p + 16) % 128
where:
a is the area, p is the port number, % is the modulus (or remainder)
≤ <
0 p 128
When the port number is greater than or equal to 128, the area ID and port number are the same.
Figure 45 shows a 4/256 SAN Director with Extended Edge PID.
470 Configuring the PID format
"Host reboots" on