Specifications

13
ATTO FibreCenter 3400
Ins
tallation and Operation Manual
3.4 Configuring the ATTO FibreCenter
The ATTO FibreCenter 3400R/D may be configured into 48 combinations of zones. If configured into more than
two zones, each Fibre Channel bus can run at different speeds. Configuration is managed through the Ethernet
port.
The ATTO Fibre Center 3400R/D Fibre Channel ports
connect into an Arbitrated Loop. When devices
connected to the hub 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 directly 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 hub, or multiple
hubs daisy chained together, are connected to the
switch.
You may not connect ports from multiple switches to
the same loop hub.
Configuring ports
The software necessary to drive the FibreCenter
3400R/D 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 hub and view responses and other
information about the hub and its performance via a
telnet server program and command line interface
commands (see Chapter 4.3)
❈
The ATTO FibreCenter 3400R/D may be
configured into several zones with at least two
ports in each zone using the
Set zone map
and
Commit Zone
CLI commands.
❈
Each Fibre Channel bus in the multiple-zone
configuration can run at different speeds (1Gb or
2 Gb).
❈
Ports are labeled 1 through 8.
❈
The ports in a zone must be adjacent in odd-even
pairs, such as ports 1 and 2, but not ports 2 and 3;
ports 1, 2, 5, 6 but not ports 1, 2, 3, 6.
❈
While there are 48 possible port configurations,
the most common configurations will be to set up
all eight ports as one zone, or set two zones with
four ports each (zone 1: ports 1, 2, 3, 4. zone 2:
ports 5, 6, 7, 8)
❈
All mapping must be completed with one
Zone
Map
command: you must set your zones all at
once with the same
Zone Map
command (see
below).
❈
You may change zone speed, zone attributes,
zone name and zone threshold with independent
commands which can be implemented with one
Commit Zone
command.
❈
The verbose on-screen return will show you the
effect of these commands before you use the
Commit Zone
command.
Data transfer when setting up zones
You must temporarily stop data transfer to the hub
when you execute the
Set zone
and
Commit Zone
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 hub’s zones or the speeds of the
zones, you must temporarily stop all data transfers
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
Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8
HostHost Host Host
Disk array
Host
Zone 1
HostHost
Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8
Disk array
Zone 2Zone 1
Host HostHostHostHost
Disk array
Host