IBM TotalStorage 2109 M12, Руководство пользователя

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Throughput
The M12 and M14 provide continuous and sustained bandwidth to all ports in a
single or dual 32-port or 64-port switch scenario at their rated line speed.
Throughput is 2.125 Gbps inbound and outbound per port. All ports can be
simultaneously loaded for up to 100% utilization at full bandwidth. The M14
backplane provides support for a 128-port switch, 10 bps fibre channel, IP
connectivity, application processing and Infiniband.
Each port on the switch is auto-sensing and supports 1 Gbps or 2 Gbps speeds.
You can manually set the ports to support either 1 Gbps or 2 Gbps links. The ports
perform speed-matching, which allows 1 Gbps and 2 Gbps links to mix on any route
within the fabric. When there is 1 Gbps in and 2 Gbps out, the ASIC delays
transmitting the outbound frame until half the frame is received at 1 Gbps. With 2
Gbps in and 1 Gbps out, the ASIC delays releasing the buffer to ensure that the 1
Gbps transmit port has adequate time to empty it.
Link distance
The M12 and M14 operate at up to 10 km (6.21 mi) at both 1 Gbps and 2 Gbps
speed settings and supports LWL SFPs and single-mode fiber.
Using the Extended Fabrics optional software feature, the switch operates at
distances greater than 10 km (6.21 mi) using various methods. The switch
leverages the current dense wavelength division multiplexing (DWDM) certification
and is certified to interoperate with equipment from Optical Networks, Cisco
Systems, Inc., Nortel Networks, and other leading vendors.
The switch operates at near full link speed at distances up to 100 km (62.13 mi) for
1 Gbps or 50 km (31.06 mi) for 2 Gbps speeds using the Extended Fabrics feature.
For information about Extended Fabrics, see Brocade Design, Deployment, and
Management Guide .
SFP fiber optic transceivers
Each 16–port card (blade assembly) supports up to 16 SFP fiber optic transceivers
that convert electrical signals to optical signals (and optical signals to electrical
signals) and are capable of transmitting at both 1 Gbps and 2 Gbps speeds.
Each SFP fiber optic transceiver supports 850 nm SWL, on multimode fiber optic
cable, or 1310 nm LWL, on single mode fiber optic cable. These miniature optical
transceivers meet the high port density that is available in the M12 and M14
switches, deliver twice the port density of standard removable GBIC transceivers,
and are encased in metal or shielded plastic to ensure low emissions and high
thermal management. SFP devices are hot-swappable and connections are through
industry-standard LC connectors.
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IBM TotalStorage SAN Switch: 2109 Model M12 and Model M14 User’s Guide