Fibre channel port attributes, Fibre channel topologies, Arbitrated loop physical addresses – HP StorageWorks XP Remote Web Console Software User Manual
Page 19: Table 4 al-pa and loop ids, 4 al-pa and loop ids
LUN Configuration and Security Manager XP user guide for the XP1024/XP128
19
•
Continuous Access XP volumes
•
BC volumes
•
External LUs
•
iSCSI volumes (volumes to which paths are defined from iSCSI ports)
•
Flex Copy XP volumes
You cannot use an LDEV as a command device if a path is defined between an iSCSI port and the LDEV.
If you want to use a LUSE volume as a command device, you must specify only the first LU as the
command device.
Fibre Channel port attributes
In Fibre Channel environments, you must configure the Fibre Channel topology and set addresses for the
Fibre Channel ports. You can enhance system performance by adjusting the data transfer speed at the
Fibre Channel ports and changing the channel adapter mode.
Fibre Channel topologies
Fibre Channel provides the following topologies:
•
Fabric: Uses a fabric switch to connect a large number of devices. Each device has the full bandwidth
of 100 MB/sec.
•
FC-AL (Fibre Channel-Arbitrated Loop): A shared-bandwidth topology that can connect up to 126
devices (AL ports).
•
Point-to-point: A simple Fibre Channel topology in which two devices are connected directly.
When configuring the disk array, use LUN Manager to specify whether the hosts and the disk array are
connected by a fabric switch. Also, you must specify FC-AL or point-to-point in the LUN Manager pane.
The default is FC-AL.
If you are using a fabric switch, consult the switch’s documentation to learn whether FC-AL or
point-to-point should be used. Some fabric switches require that you specify point-to-point to get the system
running.
Arbitrated loop physical addresses
You will need to set addresses for Fibre Channel ports. When addressing Fibre Channel ports, you can
use AL-PA (arbitrated loop physical address) or loop IDs as the addresses (see
Table 4
AL-PA and loop IDs
AL-PA
Loop ID
AL-PA
Loop ID
AL-PA
Loop ID
AL-PA
Loop ID
EF
0
B2
32
72
64
3A
96
E8
1
B1
33
71
65
39
97
E4
2
AE
34
6E
66
36
98
E2
3
AD
35
6D
67
35
99
E1
4
AC
36
6C
68
34
100
E0
5
AB
37
6B
69
33
101
DC
6
AA
38
6A
70
32
102
DA
7
A9
39
69
71
31
103
D9
8
A7
40
67
72
2E
104
D6
9
A6
41
66
73
2D
105
D5
10
A5
42
65
74
2C
106
D4
11
A3
43
63
75
2B
107
D3
12
9F
44
5C
76
2A
108