You can use Fibre Channel connections for direct connections, switch connections, and extender connections.
Use short-wave (optical multi-mode) or long-wave (optical single-mode) optical fibre cables to connect the storage systems at the primary and secondary sites. The required cables and network relay devices differ depending on the distance between the primary and secondary storage systems, as described in the following table.
|
Distance between storage systems |
Cable type |
Network relay device |
|---|---|---|
|
Up to 1.5 km |
Short wave (optical multi-mode) |
Switches are required if the distance is 0.5 to 1.5 km. |
|
1.5 to 10 km |
Long wave (optical single-mode)* |
Not required. |
|
10 to 30 km |
Long wave (optical single-mode)* |
Switches must be used. |
|
30 km or longer |
Communication line |
An authorized third-party channel extender is required. |
No special settings are required for the storage system if switches are used in a Fibre Channel environment.
Long-wave (optical single-mode) cables can be used for direct connection at a maximum distance of 10 km. The maximum distance that might result in the best performance differs depending on the link speed, as shown in the following table.
|
Link speed |
Maximum distance for best performance |
|---|---|
|
4 Gbps |
3 km |
|
8 Gbps |
2 km |
|
16 Gbps |
1 km |
|
32 Gbps |
0.6 km |
|
64 Gbps |
0.3 km |