306 ◾ Enterprise Architecture A to Z
with an IP network (i.e., Ethernet), but retains the upper-layer (FC-4) information,
such as FCP. is is accomplished by mapping the existing FC transport services to
IP [SNI200401].
ese tunneling/IP storage networking protocols are different, but they all deal with transporting
block-level data over an IP network. ese protocols enable end users to accomplish the following
[SNI200402]:
◾ Leverage existing storage devices (SCSI and FC) and networking infrastructures, such as
GbE-based LANs and IP-based intranets.
◾ Optimize storage resources to be available to a larger pool of applications.
◾ Reduce the geographic limitations of DAS and SAN access.
◾ Extend the reach of existing storage applications (