Advantech ASR-5300I Series, User Manual

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37 ASR-5300I Series Hardware User Manual
Chapter 3
S
ystem
Connection
3.3.1 Fibre-Host Components (including 10 GB iSCSI)
Speed Auto-Detection
Speed auto-detection is specified by the Fibre Channel standard. If a 16Gbps port is
connected to an 8Gbps port, the link will run at 8Gbps. If there are 16Gbps ports on
both ends of the link, the link will run at 16Gbps.
SFP/SFP+ Transceivers
An SFP transceiver converts electrical data signals into light signals and transfers
them transparently via optical fiber. A transceiver provides bi-directional data links, a
laser transmitter (for fiber optic cables), LC connector, and a metal enclosure to
reduce the EMI.
Other beneficial features of a typical SFP transceiver include a single power supply,
low power dissipation, and hot swap capability. Additionally, all transceivers should
satisfy the FC performance and reliability specifications.
FC Port Dust Plugs
Each FC port is equipped with a dust plug. Only remove these dust plugs when
inserting an SFP transceiver.
Please contact your vendor for a list of compatible components!
3.3.2 Fibre-Host Topologies
The Fibre Channel standard supports three topologies; specifically, point-to-point,
Fibre Channel Arbitrated Loop (FC-AL), and fabric switch topologies.
 Point-to-point: This involves a direct connection between two Fibre Channel
devices and is the simplest topology.
 FC-AL: This involves Fibre Channel devices all connected in a loop, and each
device is assigned an arbitrated loop physical address (AL_PA). FC-AL can
support up to 124 devices in a single loop. This is the most commonly used
topology.
 Fabric: The fabric topology can support up to 224 Fibre Channel devices, which
enables multiple devices to communicate simultaneously. However, a Fibre
switch is required to implement this topology.
Warning! Lasers can be hazardous and may cause permanent eye damage or
blindness; therefore, exercise caution when using lasers. Never look
directly at the laser when it is turned on.
Warning! The SFP transceiver contains a laser diode featuring a Class 1 laser. To
ensure continued safety, do not remove covers or attempt to gain
access to the inside of the product. Refer all servicing to qualified
personnel.
Note! If a logical drive can be accessed via different servers, file locking, FC
switch zoning, port binding, and multipath access control will be
necessary.