ATTO Technology 3400 - Manual (Page 15)

Secure Data Path Applicationv 10
Connecting Fibre Channel ports
The Fibre Channel ports connect into an
Arbitrated Loop.
When devices connected to the FibreCenter 3400
are powered up, each NL_Port must sign in with
the other ports on the loop. Each port first
attempts to find an FL_Port within the loop.
When it does, it knows it is a part of a public loop
connected to a fabric. If it does not, it knows it is
a part of a private loop consisting of other
NL_Ports only.
Arbitrated loops can have up to 126 active
NL_Ports but only one active FL_Port because the
FL_Port is considered the master. You may not
configure two switch ports (same switch or
different switches) because that would create two
FL_Ports.
The FibreCenter can connect direct to a fabric
switch, but the switch port must be configured as
an FL_Port (Loop Mode).
When connecting to a switch, make sure that only
one port of the FibreCenter 3400, or multiple hubs
daisy chained together, are connected to the
switch.
You may not connect ports from multiple switches
to the same loop FibreCenter 3400.
Cabling
Fibre Channel technology offers a variety of
cabling options including standard copper,
equalized copper, multimode fiber optic, and
single mode fiber optic.
The FibreCenter 3400 uses a Small Formfactor
Pluggable (SFP) Fibre Channel interface.
The type of cable to use varies depending upon
the application, environment and distance. The
following table illustrates the different cable
options available.
Make sure all cables are anchored securely at both
ends with the proper connectors.
Removing the FibreCenter
1 Disconnect all cables from the face of the
hub module.
2 Loosen the two thumbscrews on the face of
the hub module.
3 Carefully slide the hub module out of the
rack
Cable length Cable type Cable size Connector
Up to 175 meters multimode fiber optic 62.5 micron LC
Up to 500 meters multimode fiber optic 50 micron LC
Up to 13 meters unequalized copper HSSDC-2