HP XP P9500 Storage - Manual (Page 35)

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Set port topology to the following:
NL port: Fab on, FC-AL ◦
◦ N port: Fab on, Point-to-Point
◦ Some switch vendors require F port (for example, McData ED5000).
•
Host I/O response time can be improved on long distance switch connections by using host
mode options 49 and 50, or 51 and 65. The following table describes these options for the
8UFC or 16UFC package. A HP-approved channel extender is required.
Description Host mode options No
Fixes higher values of buffer-to-buffer credits (BBCs) to increase data
transfer size over long distances
1
. This host mode option must be used
in conjunction with host mode option 50.
2
BB Credit Set UP
Option 1 49
Fixes higher values of buffer-to-buffer credits (BBCs) to increase data
transfer size over long distances
1
. This host mode option must be used
in conjunction with host mode option 49.
2
BB Credit Set UP
Option 2 50
Improves host I/O response time for long distance switch connections.
2,
3
Round Trip Set UP
Option 51
Improves host I/O response time for long distance switch connections
with the maximum microprocessor blade (MPB) configuration (4 MPB
pairs in a 2-module DKC).
2, 3
Round Trip Extended
Set UP Option 65
1. Up to 100 km.
2. The microcode supporting these functions must be installed on both the primary and secondary system
3. If you set host mode option 51 and 65, you should set them to the same port and host group 0.
Extender connection
The following figure shows an extender connection, in which channel extenders and switches are
used to connect the devices across large distances.
Data path requirements and configurations 35