Fibre Channel extenders extend a Fibre Channel link by transmitting Fibre Channel packets across long links without changing the contents of those packets.
Lenovo has tested a number of such Fibre Channel extender technologies with Lenovo Storage V7000 and supports Fibre Channel extenders of all types for intercluster links, provided they meet the latency requirements for Metro Mirror and Global Mirror.
When you are planning to use Fibre Channel extenders, be aware that the performance of the link to the remote location decreases as the distance to the remote location increases. For Fibre Channel IP extenders, throughput is limited by latency and bit error rates. Typical I/O latency can be expected to be 10 microseconds per kilometer. Bit error rates vary depending on the quality of the circuit that is provided. You must review the total throughput rates that might be expected for your planned configuration with the vendor of your Fibre Channel extender and your network provider.
See the following web site for the latest supported hardware:
http://support.lenovo.com/us/en/products/servers/lenovo-storage