Router Capabilities; Licensed Features; Smartwrite - Qlogic iSR6142 Installation Manual

2 – General Description

Router Capabilities

Router Capabilities
The iSR6142 is a bi-directional FC-to-iSCSI router. It supports the following
topologies:
Two remote SAN islands (single or multi-vendor fabrics) (see
Local connectivity (see
FCIP – Fibre Channel over IP (see
When using the iSR6142 to connect two Fibre Channel SANs, E-ports are not
required on the Fibre Channel switches. This allows you to connect multi-vendor
FC SANs (switches) without concern for the compatibility of the E-Ports and/or
N-Ports between different switch vendors.
The iSR6142 has the following optional features:
SmartWrite™ – Provides write performance improvements.
Additional Server/Ports – Provides additional connectivity (see

Licensed Features

The iSR6142 router has two features that are available by a license key:

SmartWrite

Additional Server/Ports
SmartWrite
When connecting SAN over long distances, round-trip delays create significant
impact to the performance. Typically, data writes involve two or more round-trip
latencies that create a significant barrier to the data replication performance.
SmartWrite technology is designed to minimize the round-trip latency of any write
I/O to a single round-trip latency.
This Feature Key offers the following benefits:
Minimizes round-trip delays for any data write operation to a single
round-trip latency.
Allows load balancing over multiple IP links.
2-2
page
FC SAN islands (single or multi-vendor fabrics)
iSCSI Servers to FC SAN
FC servers to iSCSI SAN
2-6)
page 2-6)
S
page 2-4)
page 2-3).
SN0051102-00 A