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Lenovo RackSwitch G7028
Product Guide
The Lenovo RackSwitch™ G7028 is an inexpensive, entry-level Layer 2 1/10 Gb Ethernet switch that is designed for the data center. Data center customers continue to deploy applications by using 1 GbE networking switches while 10 GbE continues to grow for customer solutions that require greater I/O bandwidth. The RackSwitch G7028 is an ideal solution for data center customers who need an economical 1 Gb and 10 Gb connectivity solution.
The RackSwitch G7028 (see the following figure) is a top-of-rack data center switch that delivers excellent non-blocking, wire speed performance at an attractive price point. It supports 24x 10/100/1000BASE-T RJ-45 ports and four 10 Gigabit Ethernet SFP+ ports standard, while typically using only 45 watts of power. The RackSwitch G7028 is also designed with rear-to-front airflow, which allows for flexible mounting of the switch in a rack cabinet and provides convenient cable management and significant savings in cooling costs.
Figure 1. Lenovo RackSwitch G7028
Did you know?
The RackSwitch G7028 is designed with non-blocking, line-rate throughput.
The RackSwitch G7028 supports an optional external redundant power supply with the Lenovo RackSwitch G7000 Redundant Power Supply option.
The RackSwitch G7028 is designed specifically for the data center environment with server-matching airflow, cost-effective Layer 2 switching and ease of configuration management.
Networking Operating System software features deliver seamless, standards-based integration into upstream switches.
Lenovo RackSwitch G7028 |
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Key features
The RackSwitch G7028 switch is considered particularly suited for the following customers:
Customers who want to use GbE in their infrastructure (servers and networking) Customers who are implementing a virtualized environment and require multiple GbE ports Customers who require investment protection for 10 GbE ports
Customers who want to reduce total cost of ownership (TCO) and improve performance while maintaining high levels of availability and security
Customers who want to avoid or minimize oversubscription, which can result in congestion and loss of performance
Customers who want to implement a converged infrastructure with NAS or iSCSI
The G7028 switch offers the following key features and benefits:
Increases network performance
The RackSwitch G7028 provides up to 128 Gbps of switching throughput, supports four SFP+ 10 Gb uplink ports for zero oversubscription, and has a port to port latency of 3.3 microseconds.
Lower power and exceptional cooling
The RackSwitch G7028 typically uses only 45 W of power. Unlike side-cooled switches, which can cause heat recirculation and reliability concerns, the RackSwitch G7028 switch's rear-to-front cooling design reduces data center air conditioning costs by matching airflow to the server’s configuration in the rack.
Fault tolerance
These switches learn alternative paths automatically and perform faster convergence if there is a link, switch, or power failure. The switch uses technologies, such as Virtual Link Aggregation, L2 trunk failover, and Hot Links.
Seamless interoperability
RackSwitch switches interoperate seamlessly with other vendors' upstream switches.
The RackSwitch G7028 supports an optional external redundant power supply with the Lenovo RackSwitch G7000 Redundant Power Supply (RPS) option that is shown in the following figure.
Figure 2. Lenovo RackSwitch G7000 Redundant Power Supply
The G7000 RPS option has the following features:
Form factor: 1U rack mount
Power connections: Four DC connections in the rear of the rack to connect to the G7028 and G7052 switches; one AC inlet connector to connect to the power source (rack PDU or wall connector)
Airflow: Rear-to-front cooling
Power: Approximately 55 - 276 W, which varies depending upon operating conditions and number and types of switches connected
Rack installation: Generic rack-mount kit (2-post); optional flexible 4-post mounting option for the server rack and the communications rack
LEDs: System LEDs to indicate status
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Components and connectors
The front panel of the RackSwitch G7028 is shown in the following figure.
Figure 3. Front panel of the RackSwitch G7028
The front panel of the G7028 contains the following components:
LEDs that display the status of the switch module and the network.
One RJ-45 RS-232 console port that provides another means to configure the switch module. A total of 24 1000BASE-T Ethernet ports for 10/100/1000 Mbps connections.
Four SFP+ ports to attach SFP/SFP+ transceivers for 1 Gb or 10 Gb connections or DAC cables for 10 Gb Ethernet connections.
One RJ-45 10/100/1000 Mb Ethernet port for out-of-band management.
The rear panel of the RackSwitch G7028 is shown in the following figure.
Figure 4. Rear panel of the RackSwitch G7028
The rear panel of the G7028 contains the following components:
One AC power connector (IEC 320-C14)
Three fans with N+1 redundancy
One DC power connector for power supply redundancy
The rear panel of the RackSwitch G7000 RPS option is shown in the following figure.
Figure 5. Rear panel of the RackSwitch G7000 RPS option
The rear panel of the G7000 RPS option contains the following components:
One AC power connector (IEC-320 C14)
Four DC power connectors
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System specifications
The following table lists the RackSwitch G7028 system specifications.
Table 1. System specifications
Component |
Specification |
Form factor |
1U rack mount |
Ports |
24x Gigabit Ethernet (GbE) RJ-45 fixed ports |
|
4x SFP/SFP+ ports |
SFP/SFP+ media |
10 Gb Ethernet SFP+: |
types |
10 GbE short-range (SR) SFP+ transceivers |
|
10 GbE long-range (LR) SFP+ transceivers |
|
10 GbE RJ-45 SFP+ transceivers |
|
10 GbE SFP+ active optical cables (AOCs) |
|
10 GbE SFP+ direct attach copper (DAC) cables |
|
1/10 Gb Ethernet SFP+: |
|
1/10 GbE SX/SR SFP+ transceivers |
|
1 Gb Ethernet SFP: |
|
1 GbE short-wavelength (SX) SFP transceivers |
|
1 GbE long-wavelength (LX) SFP transceivers |
|
1 GbE RJ-45 SFP transceivers |
Port speeds |
1 GbE RJ-45 fixed ports: 10/100/1000 Mbps autosensing |
|
10 GbE SFP+ transceivers, DAC cables and AOCs: 10 Gbps |
|
1/10 GbE SFP+ transceivers: 1 Gbps or 10 Gbps |
|
1 GbE SFP transceivers: 1 Gbps |
Switching method |
Cut-through. |
Data traffic types |
Unicast, multicast, broadcast. |
Software features |
Lenovo Networking OS: |
|
Layer 2 switching, virtual local area networks (VLANs), VLAN tagging, spanning tree protocol |
|
(STP), link aggregation (trunk) groups (LAGs), virtual LAGs (vLAGs), Hot Links, Layer 2 failover, |
|
quality of service (QoS), IP v4 management, IP v6 management. |
Performance |
Non-blocking architecture with wire-speed forwarding of traffic: |
|
Up to 128 Gbps aggregated throughput |
|
As low as 3.3 microseconds switching latency |
|
Up to 96 Million packets per second (Mpps) |
|
Up to 12,288-byte jumbo frames |
Scalability |
MAC address forwarding database entries: 8,000 |
|
VLANs: 4,095 (512 active VLANs) |
|
Per VLAN Rapid Spanning Tree (PVRST) instances: 128 |
|
Multiple STP (MSTP) instances: 32 |
|
Link aggregation groups: 16 |
|
Ports in a link aggregation group: 8 |
Cooling |
Three 2+1 redundant fixed fans. Rear (non-port side) to front (port side) airflow. |
Power supply |
One fixed 90 W AC (100 - 240 V) power supply (IEC 320-C14 connector). Optional external |
|
power supply unit (PSU) is available for redundancy (one PSU with 4x 90 W DC output for up |
|
to four G7028 or G7052 switches). |
Hot-swap parts |
SFP/SFP+ transceivers, SFP+ DAC cables. |
Management |
1x 10/100/1000 Mb Ethernet port (RJ-45); 1x RS-232 port (RJ-45); 1x USB port (for additional |
ports |
firmware, log, and configuration files storage). |
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Component |
Specification |
Management |
Industry standard command line interface (isCLI); SNMP v1 and v3. Optional Lenovo XClarity |
interfaces |
for discovery, inventory, monitoring and events. |
Security features |
Secure Shell (SSH); Secure Copy (SCP); Secure FTP (sFTP); user level security, Role-based |
|
Access Control (RBAC); LDAP/LDAPS, RADIUS, and TACACS+ authentication; access |
|
control lists (ACLs); port-based network access control (IEEE 802.1x). |
Hardware |
Three-year customer-replaceable unit and onsite limited warranty with 9x5 next business day |
warranty |
terms. Optional warranty service upgrades are available through Lenovo: 24x7 coverage, 2- |
|
hour or 4-hour response time, 1-year or 2-year warranty extensions, 1-year or 3-year Remote |
|
Technical Support (RTS). |
Software |
Three-year software support and subscription is included in the base warranty. Optional 1- |
maintenance |
year and 2-year warranty extensions include software support and subscription. |
Mean Time |
128,407 hours with ambient operating temperature of 40° C |
Between Failures |
|
Dimensions |
Height: 44 mm (1.7 in.); width: 439 mm (17.3 in.); depth: 382 mm (15.0 in.) |
Weight |
5.3 kg (11.7 lb). |
Models
The following table lists the G7028 switch models.
Table 2. G7028 switch models
Description |
Part |
Machine |
Feature |
number |
Type-Model |
code |
|
Lenovo RackSwitch G7028 (Rear-to-Front) |
7159BAX |
7159-HCP |
AT09 |
The part number for the G7028 switch includes the following items:
One Lenovo RackSwitch G7028
Generic Rack Mount Kit (2-post)
Power Cord Retention Clip
Console Cable Kit:
RJ-45 (plug) to RJ-45 (plug) cable (1 m)
Mini-USB to RJ-45 (jack) cable (0.2 m)
DB-9 to RJ-45 (jack) adapter
Warranty Flyer
Important Notices Flyer
Documentation CD-ROM
Configuration notes:
Power cables are not included and must be ordered together with the switch (see "Power supplies and cables" for details).
SFP/SFP+ transceivers and cables are not included and should be ordered together with the switch, if required (see "Transceivers and cables" for details).
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Transceivers and cables
With the flexibility of the G7028 switch, customers can choose the following connectivity technologies:
For 1 GbE links, customers can use RJ-45 UTP cables up to 100 meters. Customers that need longer distances can use the 1000BASE-SX transceivers in the SFP/SFP+ ports, which can drive distances up to 220 meters with 62.5 µ multi-mode fiber (OM1) and up to 550 meters with 50 µ multi-mode fiber (OM2), or the 1000BASE-LX transceivers that support distances up to 10 kilometers with single-mode fiber (1310 nm).
For 10 GbE links (supported on SFP+ ports), customers can use direct-attached copper (DAC) SFP+ cables for in-rack cabling for distances up to 7 meters or SFP+ active optical cables (AOCs) for distances up to 20 meters. These cables have SFP+ connectors on each end, and they do not need separate transceivers. For distances up to 30 meters, the 10GBASE-T SFP+ transceiver can be used with Category 6a or 7 RJ-45 UTP cables.
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.
The supported SFP/SFP+ and DAC cable options are listed in the following table.
Table 3. Supported SFP/SFP+ transceivers and DAC cables
|
Part |
Feature |
Maximum |
Description |
quantity |
||
number |
code |
supported |
|
SFP transceivers - 1 GbE |
|
|
|
Lenovo 1000BASE-T (RJ-45) SFP Transceiver (no 10/100 Mbps support) |
00FE333 |
A5DL |
4 |
Lenovo 1000BASE-SX SFP Transceiver |
81Y1622 |
3269 |
4 |
Lenovo 1000BASE-LX SFP Transceiver |
90Y9424 |
A1PN |
4 |
SFP+ transceivers - 10 GbE |
|
|
|
Lenovo Dual Rate 1/10Gb SX/SR SFP+ Transceiver |
00MY034 |
ATTJ |
4 |
Lenovo 10GBASE-SR SFP+ Transceiver |
46C3447 |
5053 |
4 |
Lenovo 10GBASE-LR SFP+ Transceiver |
90Y9412 |
A1PM |
4 |
Lenovo 10GBASE-T SFP+ Transceiver |
7G17A03130 |
AVV1 |
4 |
Optical cables for 1 GbE SFP SX and 10 GbE SFP+ SR transceivers |
|
|
|
Lenovo 0.5m LC-LC OM3 MMF Cable |
00MN499 |
ASR5 |
4 |
Lenovo 1m LC-LC OM3 MMF Cable |
00MN502 |
ASR6 |
4 |
Lenovo 3m LC-LC OM3 MMF Cable |
00MN505 |
ASR7 |
4 |
Lenovo 5m LC-LC OM3 MMF Cable |
00MN508 |
ASR8 |
4 |
Lenovo 10m LC-LC OM3 MMF Cable |
00MN511 |
ASR9 |
4 |
Lenovo 15m LC-LC OM3 MMF Cable |
00MN514 |
ASRA |
4 |
Lenovo 25m LC-LC OM3 MMF Cable |
00MN517 |
ASRB |
4 |
Lenovo 30m LC-LC OM3 MMF Cable |
00MN520 |
ASRC |
4 |
SFP+ active optical cables - 10 GbE |
|
|
|
Lenovo 1m SFP+ to SFP+ Active Optical Cable |
00YL634 |
ATYX |
4 |
Lenovo 3m SFP+ to SFP+ Active Optical Cable |
00YL637 |
ATYY |
4 |
Lenovo 5m SFP+ to SFP+ Active Optical Cable |
00YL640 |
ATYZ |
4 |
Lenovo 7m SFP+ to SFP+ Active Optical Cable |
00YL643 |
ATZ0 |
4 |
Lenovo RackSwitch G7028 |
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|
Part |
Feature |
Maximum |
Description |
quantity |
||
number |
code |
supported |
|
Lenovo 15m SFP+ to SFP+ Active Optical Cable |
00YL646 |
ATZ1 |
4 |
Lenovo 20m SFP+ to SFP+ Active Optical Cable |
00YL649 |
ATZ2 |
4 |
SFP+ passive direct-attach cables - 10 GbE |
|
|
|
Lenovo 0.5m Passive SFP+ DAC Cable |
00D6288 |
A3RG |
4 |
Lenovo 1m Passive SFP+ DAC Cable |
90Y9427 |
A1PH |
4 |
Lenovo 1.5m Passive SFP+ DAC Cable |
00AY764 |
A51N |
4 |
Lenovo 2m Passive SFP+ DAC Cable |
00AY765 |
A51P |
4 |
Lenovo 3m Passive SFP+ DAC Cable |
90Y9430 |
A1PJ |
4 |
Lenovo 5m Passive SFP+ DAC Cable |
90Y9433 |
A1PK |
4 |
Lenovo 7m Passive SFP+ DAC Cable |
00D6151 |
A3RH |
4 |
SFP+ active direct-attach cables - 10 GbE |
|
|
|
Lenovo 1m Active DAC SFP+ Cable |
00VX111 |
AT2R |
4 |
Lenovo 3m Active DAC SFP+ Cable |
00VX114 |
AT2S |
4 |
Lenovo 5m Active DAC SFP+ Cable |
00VX117 |
AT2T |
4 |
Spare console cables |
|
|
|
Console Cable Kit Spare (RJ45/DB9) |
90Y9462 |
A2MG |
1 |
The network cables that can be used with the switch are listed in the following table.
Table 4. G7028 network cabling requirements
Transceiver |
Standard |
Cable |
Connector |
10 Gb Ethernet |
|
|
|
10Gb SR SFP+ (46C3447) |
10GBASE-SR |
Up to 30 m with fiber optic cables supplied by Lenovo |
LC |
1/10Gb SFP+ (00MY034) |
|
(see Table 3); up to 300 m with OM3 multimode fiber or |
|
|
|
up to 400 m with OM4 multimode fiber |
|
10Gb LR SFP+ (90Y9412) |
10GBASE-LR |
1310 nm single-mode fiber cable up to 10 km |
LC |
10Gb RJ-45 SFP+ |
10GBASE-T |
UTP Category 6a or 7 up to 30 meters |
RJ-45 |
(7G17A03130) |
|
|
|
Active optical cable |
10GBASE-SR |
SFP+ active optical cables up to 20 m (see Table 3) |
SFP+ |
Direct attach copper cable |
10GSFP+Cu |
SFP+ DAC cables up to 7 m (see Table 3) |
SFP+ |
1 Gb Ethernet |
|
|
|
RJ-45 ports (fixed) |
1000BASE-T |
UTP Category 5, 5E, and 6 up to 100 meters |
RJ-45 |
1Gb RJ-45 SFP (00FE333) |
1000BASE-T |
UTP Category 5, 5E, and 6 up to 100 meters |
RJ-45 |
1Gb SX SFP (81Y1622) |
1000BASE-SX |
Up to 30 m with fiber optic cables supplied by Lenovo |
LC |
1/10Gb SFP+ (00MY034) |
|
(see Table 3); 850 nm multimode fiber cable 50 µ (OM2) |
|
|
|
up to 550 m or 62.5 µ (OM1) up to 220 m |
|
1Gb LX SFP (90Y9424) |
1000BASE-LX |
1310 nm single-mode fiber cable up to 10 km |
LC |
Management ports |
|
|
|
Ethernet management port |
1000BASE-T |
UTP Category 5, 5E, and 6 up to 100 meters |
RJ-45 |
RS-232 serial console port |
RS-232 |
DB-9/RJ-45-to-RJ-45 (comes with the switch) |
RJ-45 |
Lenovo RackSwitch G7028 |
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