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The network cables that can be used with the switch are listed in the following table.

Table 4. G7028 network cabling requirements

Transceiver

10 Gb Ethernet

10Gb SR SFP+ (46C3447)

1/10Gb SFP+ (00MY034)

10Gb LR SFP+ (90Y9412)

Direct attach cable

1 Gb Ethernet

RJ-45 ports (fixed)

1Gb RJ-45 SFP (00FE333)

1Gb SX SFP (81Y1622)

1/10Gb SFP+ (00MY034)

1Gb LX SFP (90Y9424)

Management ports

Ethernet management port 1000BASE-T

RS-232 serial console port RS-232

Software features

The G7028 switch has the following software features:

Scalability and performance:

Media access control (MAC) address learning with automatic updates

Static and LACP (IEEE 802.3ad) link aggregation (trunks)

Broadcast/multicast storm control

IGMP snooping for limit flooding of IP multicast traffic

IGMP filtering to control multicast traffic for hosts participating in multicast groups

Configurable traffic distribution schemes over trunk links based on source/destination IP or

MAC addresses, or both

Fast port forwarding for rapid STP convergence

Availability and redundancy:

IEEE 802.1D STP for providing L2 redundancy

IEEE 802.1s Multiple STP (MSTP) for topology optimization

IEEE 802.1w Rapid STP (RSTP) (provides rapid STP convergence for critical delay-sensitive

traffic such as voice or video)

Per-VLAN Rapid STP (PVRST) enhancements

Layer 2 Trunk Failover to support active/standby configurations of network adapter teaming

on servers

Hot Links provides basic link redundancy with fast recovery for network topologies that

require Spanning Tree to be turned off

VLAN support:

Port-based and protocol-based VLANs

Up to 4095 VLANs supported per switch (512 active VLANs), with VLAN numbers 1 - 4095

(4095 is used for management connection only)

802.1Q VLAN tagging support on all ports

802.1x with Dynamic VLAN assignment

Private VLANs

Lenovo RackSwitch G7028

Standard

Cable

10GBASE-SR Up to 30 m with fiber optic cables supplied by Lenovo

(see Table 3); up to 300 m with OM3 multimode fiber or

up to 400 m with OM4 multimode fiber

10GBASE-LR

1310 nm single-mode fiber cable up to 10 km

10GSFP+Cu

SFP+ DAC cables up to 7 m (see Table 3)

1000BASE-T

UTP Category 5, 5E, and 6 up to 100 meters

1000BASE-T

UTP Category 5, 5E, and 6 up to 100 meters

1000BASE-SX Up to 30 m with fiber optic cables supplied by Lenovo

(see Table 3); 850 nm multimode fiber cable 50 µ (OM2)

up to 550 m or 62.5 µ (OM1) up to 220 m

1000BASE-LX 1310 nm single-mode fiber cable up to 10 km

UTP Category 5, 5E, and 6 up to 100 meters

DB-9/RJ-45-to-RJ-45 (comes with the switch)

Connector

SFP+

RJ-45