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HP XP P9500 User Manual: Supported Data Path Configurations

Continuous access synchronous for mainframe systems.
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With Fibre Channel connections, you can use the switches as ordinary switch connections. No
special settings are required for the P9500.
Direct connections up to 10 km with single-mode longwave Fibre Channel interface cables are
supported. Link speed determines the maximum distance you can transfer data and still achieve
good performance. The following shows link speed and maximum distance for best performance.
Table 18 Link speed, maximum distance to 10 km
Link speed
1 Gbps
2 Gbps
4 Gbps
8 Gbps
Your HP account team can provide the latest information on the availability of Fibre Channel
Continuous Access Synchronous Z connections.

Supported data path configurations

Three Fibre Channel configurations are supported for Continuous Access Synchronous Z.
Direct connection—two devices are connected directly together, shown below.
Figure 4 Direct connection
*1
Set port topology to: Fab off, FC-AL.
In the configuration using 8UFC or 16UFC P/K between the MCU and RCU with a long
distance (approximately 100 km) direct connection, the response time of the host mode I/O
can be improved by setting host mode options as shown in the following Table.
For the configuration to set the host mode options, ensure the use of a HP-approved extender.
Table 19 Host mode options for long-distance remote copy connection
No
Host mode options
49
BB Credit Set UP
Option 1
50
BB Credit Set UP
Option 2
When to select this options
Use this option if you want to fix the number of buffer-to-buffer credits (BBCs) to
*1,*2
control the data transfer size on the Fibre Channel due to long distance
(approximately 100 km) between MCU and RCU for the Cnt Ac-S Z pairs without
switches.
Use this option combining with host mode option 50.
Use this option if you want to fix the number of buffer-to-buffer credits (BBCs) to
*1,*2
control the data transfer size on the Fibre Channel due to long distance
(approximately 100 km) between MCU and RCU for the Cnt Ac-S Z pairs without
switches.
Maximum distance for best performance
10 km
6 km
3 km
2 km
Planning data paths
35

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