11
ATTO FibreCenter 3400
Ins
tallation and Operation Manual
6 Configuring the ATTO FibreCenter
The ATTO FibreC ente r 3400 ma y be c onf ig ured as one 8-port hub (Zone 1) or two 4-port hubs (Zone 2
and Zone 3). Each Fibre Channel bus in the two-zone configuration can run at different speeds (1Gb or
2Gb). The zones may be configured as either a one or two A-B style switch in a FC-AL loop.
Configuration is managed thro ug h a 10 /1 00 Ba seT E the rnet port .
The software necessary to drive the FibreCenter
3400 consists of two segments: the switching
logic and the command-processing logic.
The switching logic sets up hardware
configurations. The command-processing logic
allows you to change parameters on the
FibreCenter 3400 and view responses and other
information about the hub and its performance via
a Telnet server program and command line
interface commands (see Chapter 7.3)
The ATTO FibreCenter 3400 may be configured
as one 8-port hub (Zone 1) or two 4-port hubs
(Zone 2 and Zone 3) using the Setup and Switch
CLI commands. Each Fibre Channel bus in the
two-zone configuration can run at different speeds
(1Gb or 2Gb). The zones may be configured as
either a one or two A-B style switch in a FC-AL
loop. A zone is defined by the following
parameters:
❈
A zone contains only adjacent ports.
❈
Except for the Get Switch command return,
Ports are labeled P1 through P8: all
connections are assumed to be between port
P1 and P2 | P3 | P4 | P5 | P6 | P7 | P8 in zone
1, between port P1 and P2 | P3 | P4 in zone 2
and between port P5 and P6 | P7 | P8 in zone
3. In the Get Switch command return, ports
are labeled with letters.
❈
Zone 2 and Zone 3 do not overlap.
❈
Within a zone, all ports are disabled except
the lowest-numbered port (counting from the
left) and the single other port to which it is
switched.
Data transfer when setting up zones
You must temporarily stop data transfer to the hub
when you execute the Setup and Switch
commands during setup of the ATTO FibreCenter.
Only the initiators can stop data transfer; the
FibreCenter cannot stop data transfers.
❈
If you are changing the FibreCenter 3400
from a single-zone configuration to a dual-
zoned configuration, you must temporarily
stop all data transfers from the host to the
FibreCenter.
❈
If you are changing zone 2 setup in a dual-
zoned configuration, but not changing zone
3, you must temporarily stop all data
transfers from the host in zone 2 but data
transfer may continue in zone 3.
❈
If you are changing from a dual-zoned
configuration to a single-zoned
configuration, you must temporarily stop all
data from the host to the FibreCenter.
FibreCenter behavior on reset or power-up
The ATTO FibreCenter takes about 40 seconds to
begin operation after power-up or execution of the
Reset command. All ports are disabled during this
40 seconds. When the FibreCenter begins
operation, it will use its default configuration or
the last mapping designated by the Setup and
Switch commands.
Zone 1
The FibreCenter 3400 may be configured into one
zone in which all eight ports are available. Up to
seven devices may access the eighth port, one at a
time.
Zone 2 and Zone 3
The FibreCenter 3400 may be configured into two
separate zones. In each zone, up to three devices
may access the fourth port in that zone, one at a
time. Devices in one zone may not access ports in
the other zone.