ATTO Technology 3400 Configuring the Atto FibreCenter, Data transfer when setting up zones

6 Configuring the ATTO FibreCenter

The ATTO FibreCenter 3400 may be configured 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 through a 10/100 BaseT Ethernet 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-upThe 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.

11 ATTO FibreCenter 3400 Installation and Operation Manual