15 San Extension; San Extension Overview - HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays Reference Manual

15 SAN extension

SAN extension enables you to implement disaster-tolerant storage solutions over long distances and
multiple sites.
This chapter describes the following topics:
SAN extension
Fibre Channel long-distance
Multi-protocol long-distance
HP multi-protocol long-distance
HP storage replication
Certified third-party WDM, iFCP, and SONET

SAN extension overview

A SAN extension is an extended ISL connection between switches, typically linking two sites. An
extended ISL is considered to be:
Any distance greater than:
50 m for 8 Gb/s Fibre Channel
150 m for 4 Gb/s Fibre Channel
300 m for 2 Gb/s Fibre Channel
500 m for 1 Gb/s Fibre Channel
Any distance between a pair of WDM, FCIP, or FC-SONET products
NOTE:
Fibre Channel distances listed here assume the use of type OM2 fiber optic cable. For the supported
distances for each Fibre Channel speed and interconnect type, see
"SAN fabric connectivity
overview, page 279
technology, page 282
technology, page 290
products, page 298
products, page 323
rules" on page 167.
products, page 352
SAN Design Reference Guide 279