Lenovo Flex System EN4023 Manual del producto - Página 3
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Table 2. Supported port combinations
Supported port combinations
24x 10 GbE ports (internal and external)
40x 10 GbE ports (internal and external)
40x 10 GbE ports (internal and external)
2x external 40 GbE QSFP+ ports
56x 10 GbE ports (internal and external)
2x external 40 GbE QSFP+ ports
Supported cables and transceivers
With the flexibility of the EN4023 switch, clients can use the technologies that they require for the following
environments:
For 1 GbE links, clients can use RJ-45 SFP transceivers with UTP cables up to 100 meters. Clients that
need longer distances can use a 1000BASE-SX transceiver, which can drive distances up to 220 meters
by using 62.5 µ multi-mode fiber and up to 550 meters with 50 µ multi-mode fiber, or the 1000BASE-LX
transceivers that support distances up to 10 kilometers by using single-mode fiber (1310 nm).
For 10 GbE (on external SFP+ ports), you can use SFP+ direct-attached copper (DAC) cables for in-rack
cabling and distances up to 5 meters. These DAC cables have SFP+ connectors on each end, and they
do not need separate transceivers. For longer distances the 10GBASE-SR transceiver can support
distances up to 300 meters over OM3 multimode fiber or up to 400 meters over OM4 multimode fiber. The
10GBASE-LR transceivers can support distances up to 10 kilometers on single mode fiber.
For 40 GbE to 40 GbE connectivity, clients can use the affordable QSFP+ to QSFP+ DAC cables for
distances up to 3 meters. For distances up to 100 m, the 40GBASE-SR4 QSFP+ transceivers can be used
with OM3 multimode fiber or up to 150 m when using OM4 multimode fiber.
For 8 Gb FC links (supported on Flex Ports only), you can use 8 Gb FC SFP+ SW optical transceivers plus
LC fiber optics cables for distances up to 150 m with OM3 multi-mode fiber. These transceivers can
operate at 2/4/8 Gbps speeds.
For 16 Gb FC links (supported on Flex Ports only), you can use 16 Gb FC SFP+ SW optical transceivers
plus LC fiber optics cables for distances up to 100 m with OM3 multi-mode fiber or up to 125 m with OM4
multi-mode fiber. These transceivers can operate at 4/8/16 Gbps speeds.
The following table lists the supported transceivers and cables.
Table 3. Supported transceivers and direct-attach cables
Lenovo Flex System EN4023 10Gb Scalable Switch
Quantity required
Base switch,
Upgrade 1,
94Y5212
94Y5158
1
0
1
0
1
1
1
1
Upgrade 2,
94Y5159
0
1
0
1
3