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Loop Initialization Previously Assigned (LIPA)
20-byte payload
11030000
16-byte bit map of AL_PAs
The loop master transmits the bit map resulting from the LIFA.
The L_Port checks to see if the bit that corresponds to its previously acquired AL_PA is set. If not, the L_Port
sets it to '1'. If the L_Port's bit has already been set by another port, it will attempt to assume a soft-assigned
AL_PA (LISA).
Example
The L_Port had a previously assigned AL_PA of 4 which was
not already set by another port, so it set the bit at position 4 to
'1'.
Bit position
0
AL_PA positions --
Switch address --
Bit map content
L
The L_Port at AL_PA 4 claims its'
previously assigned address.
The L_Port then retransmits the LIPA frame.
Loop Initialization Hard Assigned (LIHA)
20-byte payload
11040000
16-byte bit map of AL_PAs
The loop master transmits the bit map resulting from the LIPA.
The L_Port checks to see if the bit that corresponds to its hard address is set (usually using switches or jump-
ers). If not, the L_Port sets it to '1'. If the L_Port's bit has already been set by another port, it will attempt to
assume a soft-assigned AL_PA (LISA).
Example
The L_Port had a hard address set by switch or jumper at
AL_PA 8 which was not already set by another port, so it set the
bit at position 8 to '1'.
Bit position
0
AL_PA positions --
Switch address --
Bit map content
L
The L_Port at AL_PA 8 claims its'
preferred (hard-assigned) address.
The L_Port then retransmits the LIHA frame.
Fibre Channel Interface Manual, Rev. D
1
2
3
4
5
00
01
02
04
08
7E
7D
7C
7B
7A
0
0
0
1
0
1
2
3
4
5
00
01
02
04
08
7E
7D
7C
7B
7A
0
0
0
1
0
6
7
8
...
128
0F
10
17
...
EF
79
78
77
...
00
0
0
0
...
0
6
7
8
...
128
0F
10
17
...
EF
79
78
77
...
00
0
0
1
...
0
39
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