Chaparral Chaparral FS 1310 manual Loop ID to Alpa Mapping, Decimal

Address and Device Mapping

Loop ID to AL_PA Mapping

During the Fibre Channel Arbitrated Loop (FC-AL) initialization process, a unique Arbitrated Loop Physical Address (AL_PA) value is assigned to each port on the loop. Not all of the 256 hex values are allowed as AL_PA values per FC-AL, so Loop IDs are used to represent the 125 addresses that the router can use. You can assign a Loop ID to the router. See Changing the Router’s Loop ID on page 3-8.

Table A-2shows how a Loop ID value maps to an AL_PA. If you set the Loop ID to SOFT, the router attempts to obtain an available Loop ID, in the following order: 0, 1, 2, etc.

Table A-2. Arbitrated loop physical addresses

Loop ID	AL_PA	Loop ID	AL_PA	Loop ID	AL_PA
(decimal)	(hex)	(decimal)	(hex)	(decimal)	(hex)
0	EF	19	CA	38	AA
1	E8	20	C9	39	A9
2	E4	21	C7	40	A7
3	E2	22	C6	41	A6
4	E1	23	C5	42	A5
5	E0	24	C3	43	A3
6	DC	25	BC	44	9F
7	DA	26	BA	45	9E
8	D9	27	B9	46	9D
9	D6	28	B6	47	9B
10	D5	29	B5	48	98
11	D4	30	B4	49	97
12	D3	31	B3	50	90
13	D2	32	B2	51	8F
14	D1	33	B1	52	88
15	CE	34	AE	53	84
16	CD	35	AD	54	82
17	CC	36	AC	55	81
18	CB	37	AB	56	80
57	7C	80	55	103	31
58	7A	81	54	104	2E
59	79	82	53	105	2D
60	76	83	52	106	2C
61	75	84	51	107	2B

A-3