RackSwitch G8124E
Lenovo Press Product Guide
The RackSwitch™ G8124E (shown in Figure 1) delivers exceptional performance that is both lossless
and low latency. In addition, the G8124E delivers excellent cost savings as you consider acquisition
costs, energy costs, plus its feature-rich design with when it comes to virtualization, CEE/FCoE, high
availability, and its enterprise class Layer 2 and Layer 3 functionality.
With support for 1 Gb Ethernet or 10 Gb Ethernet, the G8124E switch is designed for those clients that
are leveraging 10 GbE today or have plans to in the future. This is the first top of rack (TOR) 10 GbE
switch designed to support Virtual Fabric, which helps clients significantly reduce cost and complexity
when it comes to the I/O requirements of most virtualization deployments today. Virtual Fabric can help
clients reduce the number of multiple I/O adapters down to a single dual-port 10 GbE adapter, in addition
to reducing the number of cables and upstream switch ports required. Virtual Fabric allows clients to
carve up a dual-port 10 GbE adapter into eight virtual NICs (vNICs) and create dedicated virtual pipes
between the adapter and the switch for optimal performance, plus higher availability and better security.
This functionality provides the ability to dynamically allocate bandwidth per vNIC in increments of 100 Mb,
while being able to adjust over time without downtime.
Figure 1. RackSwitch G8124E
Did you know?
The G8124E switch is designed to support a number of separate types of configurations from a server or
downstream switches: 1 Gb, 10 Gb, virtual NIC, Converged Enhanced Ethernet (CEE/FCoE), and iSCSI.
This single switch can handle all these workloads and can connect to an upstream 1 Gb or 10 Gb
infrastructure, or both.
The G8124E is designed to support data center bridging (DCB), which is the IEEE’s group of protocols
that provide Lossless Ethernet and allows for clients to reduce the costs of implementing FCoE by
leveraging port aggregation before connecting to more costly upstream gateway devices.
The G8124E can be configured in "easy connect" mode to allow for transparent and simple connectivity to
the upstream network, enabling easy connectivity to upstream Cisco, Juniper or other networks without
having to change those networks.
Virtual Fabric helps clients reduce costs and complexity in environments where they need four or more
NICs per server. A perfect example is virtualization, where clients often need as many as eight NICs per
server.
The G8124E can help clients reduce the complexity of managing VMs and VM migration with VMready®
feature that makes the network VM-aware.
RackSwitch G8124E
1
Part number information
The part numbers to order the switch and additional options are shown in Table 1.
Table 1. Part numbers and feature codes for ordering
Part number
Feature code for
MTM 7309-HC6
Feature code for
MTM 7309-HC7
RackSwitch G8124E (Rear to Front)
7309BR6
A1PF
None
RackSwitch G8124E (Front to Rear)
7309BF7
None
A1PG
Console Cable Kit Spare
90Y9462
A2MG
A2MG
Adjustable 19" 4 Post Rail Kit
00D6185
A3KP
A3KP
Recessed 19" 4 Post Rail Kit
00CG089
None
A51M
iDataPlex Rail Kit
90Y3535
None
A1SZ
Air Inlet Duct for 382 mm RackSwitch
00D6062
A3HG
None
Description
Switch
Miscellaneous options
The part numbers for the G8124E switches include the following items:

One RackSwitch G8124E switch

Generic Rack Mount Kit (2-post)

Console Cable Kit that includes:
o
o
o
RJ-45 (plug) to RJ-45 (plug) serial cable (1 m)
Mini-USB to RJ-45 (jack) adapter cable (0.2 m) with retention clip
DB-9 to RJ-45 (jack) adapter

Warranty Flyer

Important Notices Flyer

Documentation CD-ROM
The G8124E switch has two redundant 275 W AC power supplies. Each internal power supply has an
individual IEC 320-C14 power connector on the rear panel. Power cables are not included and must be
ordered separately (see Table 2 for details).
The G8124E switch comes standard with the Console Cable Kit for management through a serial
interface. Spare serial management cables can be ordered, if required. The Console Cable Kit Spare
option contains the following items:



RJ-45 (plug) to RJ-45 (plug) serial cable (1 m)
Mini-USB to RJ-45 (jack) adapter cable (0.2 m) with retention clip
DB-9 to RJ-45 (jack) adapter
The G8124E switch supports optional adjustable 19-inch, 4-post rack installation kit, part number
00D6185. Optionally, Air Inlet Duct, part number 00D6062, can be ordered for the G8124E (rear-to-front
airflow) switch for 4-post rack installations.
RackSwitch G8124E
2
The G8124E (front-to-rear airflow) switch optionally supports Recessed 19-inch 4-Post Rail Kit
(00CG089) which is used when the switch is installed in the Intelligent Cluster Rack (MT 1410),
Enterprise Rack (MT 9363), or PureFlex System Rack (MT 9363) with NeXtScale System. The G8124E
(front-to-rear airflow) switch also supports 4-post iDataPlex rack kit (90Y3535) which is used when the
switch is installed in the iDataPlex Rack.
The G8124E switch ships standard without any AC power cables. Table 2 lists the part numbers and
feature codes to order the power cables (two power cables are required per switch).
Table 2. Power cables
Description
Part number
Feature code for
MTM 7309-HC6 and
7309-HC7
1.5m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
39Y7937
6201
2.8m, 10A/100-250V, C13 to IEC 320-C20 Rack Power Cable
39Y7938
6204
4.3m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
39Y7932
6263
European 10A line C13 to CEE 7/7 (2.8M)
39Y7917
6212
Denmark 10A line C13 to DK2-5A (2.8M)
39Y7918
6213
Switzerland 10A line C13 to SEV 1011 (2.8M)
39Y7919
6216
Israel 10A line C13 to SI 32 (2.8M)
39Y7920
6218
South Africa 10A line C13 to SABS 164/1 (2.8M)
39Y7922
6214
United Kingdom 10A line C13 to BS 1363 (2.8M)
39Y7923
6215
Australia/NZ 10A line C13 to SAA-AS C112 (2.8M)
39Y7924
6211
Korea 7A line C13 to KETI 15A/250V (2.8M)
39Y7925
6219
India 6A line C13 to Fig 68 (2.8M)
39Y7927
6269
China 6A line C13 to GB 2099.1 (2.8M)
39Y7928
6210
Brazil 10A line C13 to NBR 6147 (2.8M)
39Y7929
6223
Argentina 10A line C13 to IRAM 2063 (2.8M)
39Y7930
6222
10A/250V C13 to NEMA 6-15P 2.8m power cord
46M2592
A1RF
Japan 10A/100V C13 to JIS C-8303 2.8m power cord
46M2593
A1RE
Rack power cables
Country-specific power cords
RackSwitch G8124E
3
Supported cables and transceivers
With the flexibility of the G8124E switch, clients can take advantage of the technologies that they require
for multiple environments:

For 1 GbE links, clients can use RJ-45 SFP transceivers with UTP cables up to 100 m. 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 using single-mode fiber (1310
nm).

For 10 GbE links, clients can use direct-attached copper (DAC) SFP+ cables for in-rack cabling for
distances up to 7 m. 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 with LC
connectors. The 10GBASE-LR transceivers can support distances up to 10 kilometers on single
mode fiber with LC connectors. For extended distances, the 10GBASE-ER transceivers can support
distances up to 40 kilometers on single mode fiber with LC connectors.
Table 3 lists the supported cables and transceivers.
Table 3. Supported transceivers and direct-attach cables (Part 1)
Part number
Feature code for
MTM 7309-HC6 and
7309-HC7
SFP 1000Base-T (RJ-45) Transceiver (does not support 10/100 Mbps)
00FE333
A5DL
SFP SX Transceiver
81Y1622
3269
SFP LX Transceiver
90Y9424
A1PN
SFP+ SR Transceiver
46C3447
5053
SFP+ LR Transceiver
90Y9412
A1PM
SFP+ ER Transceiver
90Y9415
A1PP
1m LC-LC Fiber Cable (networking)
88Y6851
A1DS
5m LC-LC Fiber Cable (networking)
88Y6854
A1DT
25m LC-LC Fiber Cable (networking)
88Y6857
A1DU
Description
SFP transceivers - 1 GbE
SFP+ transceivers - 10 GbE
Optical cables for 1 GbE SFP SX and 10 GbE SFP+ SR transceivers
RackSwitch G8124E
4
Table 3. Supported transceivers and direct-attach cables (Part 2)
Part number
Feature code for
MTM 7309-HC6 and
7309-HC7
0.5m Passive DAC SFP+ Cable
00D6288
A3RG
1m Passive DAC SFP+ Cable
90Y9427
A1PH
1.5m Passive DAC SFP+ Cable
00AY764
A51N
2m Passive DAC SFP+ Cable
00AY765
A51P
3m Passive DAC SFP+ Cable
90Y9430
A1PJ
5m Passive DAC SFP+ Cable
90Y9433
A1PK
7m Passive DAC SFP+ Cable
00D6151
A3RH
1m Active DAC SFP+ Cable
95Y0323
A25A
3m Active DAC SFP+ Cable
95Y0326
A25B
5m Active DAC SFP+ Cable
95Y0329
A25C
Description
SFP+ passive direct-attach cables - 10 GbE
SFP+ active direct-attach cables - 10 GbE*
* IBM Power Systems 10Gb NIC connectivity requires SFP+ active DAC cables.
Benefits
The RackSwitch G8124E switch is considered particularly suited for these clients:

Clients who are looking for ultra low latency 10 GbE networking

Clients who are looking to converge their SAN and LAN and needing a FCoE transit switch

Clients who are looking for ways to reduce cost (CAPEX)

o
Converge LAN and SAN traffic
o
Purchase fewer adapters, transceivers and cables per server
o
Reduce upstream switching costs – fewer ports
Clients who are looking to reduce complexity (OPEX)
o
Fewer adapters to manage
o
Manage fewer cables helping reduce potential points of failure
o
Ability to standardize on Ethernet from all servers, Ethernet for all connectivity in a rack
o
Ability to push out FC split to the end of the row
RackSwitch G8124E
5
The RackSwitch G8124E offers the following benefits:
High performance: The 10 GbE low latency (as low as 570 nanoseconds) switch provides the best
combination of extremely low latency, non-blocking line-rate switching and ease of management.
Lower power and better cooling: The G8124E uses as little power as two 60 W light bulbs, which is
a fraction of the power consumption of most competitive offerings. Unlike side-cooled switches, which
can cause heat recirculation and reliability concerns, the G8124E rear-to-front cooling design reduces
data center air conditioning costs by having airflow match the servers in the rack. In addition, variable
speed fans assist in automatically reducing power consumption.
Virtual Fabric can help customers address I/O requirements for multiple NICs while also helping
reduce cost and complexity. Virtual Fabric allows for the carving up of a physical NIC into multiple
virtual NICs (2 - 8 vNICs) and creates a virtual pipe between the adapter and the switch for improved
performance, availability, and security while reducing cost and complexity.
VM-aware networking: VMready software on the switch helps reduce configuration complexity while
significantly improving security levels in virtualized environments. VMready automatically detects
virtual machine movement from one physical server to another, and instantly reconfigures each VM’s
network policies across VLANs to keep the network up and running without interrupting traffic or
impacting performance. VMready works with all leading VM providers such as VMware, Citrix, Xen,
IBM PowerVM, and Microsoft Hyper-V.
Layer 3 functionality: The switch includes Layer 3 functionality, which provides security and
performance benefits as inter-VLAN traffic stays within the chassis. This switch also provides the full
range of Layer 3 protocols from static routes for technologies such as Open Shortest Path First
(OSPF) and Border Gateway Protocol (BGP) for enterprise customers.
Seamless interoperability: RackSwitch switches interoperate seamlessly with other vendors'
upstream switches. For more information, see Tolly Reports: Tolly Functionality and Certification:
RackSwitch G8000 and G8124 and Cisco Catalyst Interoperability Evaluation, found at the following
website:
http://ibm.co/ZRwiR0
Fault tolerance: These switches learn alternate routes automatically and perform faster convergence
in the unlikely case of a link, switch, or power failure. The switch uses proven technologies, such as
L2 trunk failover, advanced VLAN-based failover, VRRP, Hot Links, IGMP V3 snooping, and OSPF.
Converged fabric: The switch is designed to support CEE/DCB and connectivity to FCoE gateways.
CEE helps enable clients to combine storage, messaging traffic, VoIP, video, and other data on a
common data center Ethernet infrastructure. FCoE helps enable highly efficient block storage over
Ethernet for consolidating server network connectivity. As a result, clients can deploy a single server
interface for multiple data types, which can simplify both deployment and management of server
network connectivity, while maintaining the high availability and robustness required for storage
transactions.
Transparent networking capability: With a simple configuration change to Easy Connect mode, the
RackSwitch G8124E becomes a transparent network device, invisible to the core, eliminating network
administration concerns of Spanning Tree Protocol configuration/interoperability, VLAN assignments
and avoids any possible loops. By emulating a host NIC to the data center core, it accelerates the
provisioning of VMs by eliminating the need to configure the typical access switch parameters.
RackSwitch G8124E
6
Features and specifications
Note: Features and specifications listed in this section are based on Networking OS 7.9.
The RackSwitch G8124E has the following features and specifications:



Form factor: 1U rack mount switch
o
RackSwitch G8124E Rear-to-Front version for ports located in the rear of the rack matching
System x®, BladeCenter® and Flex System® designs
o
RackSwitch G8124E Front-to-Rear version for ports located in the front of the rack matching
airflow of iDataPlex® and NeXtScale™ System designs
Ports
o
24 ports for 1 Gb or 10 Gb Ethernet SFP/SFP+ transceivers (support for 1000BASE-SX,
1000BASE-LX, 1000BASE-T, 10GBASE-SR, 10GBASE-LR, and 10GBASE-ER) or SFP+
direct-attach copper cables. SFP+ modules and DAC cables are not included and must be
purchased separately.
o
Two 10/100/1000 Ethernet port (RJ-45 connector) for out of band (OOB) management
o
One RS-232 serial port (Mini-USB connector) that provides an additional means to configure the
switch
Scalability and performance
o
1 Gb and 10 Gb Ethernet ports for bandwidth optimization and performance
o
Non-blocking architecture with wire-speed forwarding of traffic and aggregated throughput of 480
Gbps
o
100% line-rate performance with 570 nanoseconds switching latency
o
Media access control (MAC) address learning: automatic update, support for up to 16,000 MAC
addresses
o
Up to 128 IP interfaces per switch (interfaces 127 and 128 are reserved for switch management)
o
Static and LACP (IEEE 802.3ad) link aggregation, up to 16 trunk groups with up to 12 ports per
trunk group
o
Support for jumbo frames (up to 9,216 bytes)
o
Broadcast/multicast storm control
o
IGMP snooping to limit flooding of IP multicast traffic
o
IGMP filtering to control multicast traffic for hosts participating in multicast groups
o
Configurable traffic distribution schemes over trunk links based on source/destination IP or MAC
addresses, or both
o
Fast port forwarding and fast uplink convergence for rapid STP convergence
RackSwitch G8124E
7




Availability and redundancy
o
Virtual Router Redundancy Protocol (VRRP) for Layer 3 router redundancy
o
IEEE 802.1D STP for providing L2 redundancy
o
IEEE 802.1s Multiple STP (MSTP) for topology optimization, up to 32 STP instances are
supported by a single switch
o
IEEE 802.1w Rapid STP (RSTP) provides rapid STP convergence for critical delay-sensitive
traffic like voice or video
o
Per-VLAN Rapid STP (PVRST) enhancements
o
Layer 2 Trunk Failover to support active/standby configurations of network adapter teaming on
compute nodes
o
Hot Links provides basic link redundancy with fast recovery for network topologies that require
Spanning Tree to be turned off
VLAN support
o
Up to 4095 VLANs supported per switch, with VLAN numbers ranging from 1 to 4095 (VLAN 4095
is used by the management network.)
o
Port-based VLANs
o
802.1Q VLAN tagging support
o
Private VLANs support
Security
o
VLAN-based, MAC-based, and IP-based access control lists (ACLs)
o
802.1x port-based authentication
o
Multiple user IDs and passwords
o
User access control
o
Radius, TACACS+ and LDAP authentication and authorization
o
NIST 800-131A Encryption
o
Selectable encryption protocol
Quality of Service (QoS)
o
Support for IEEE 802.1p, IP ToS/DSCP, and ACL-based (MAC/IP source and destination
addresses, VLANs) traffic classification and processing
o
Traffic shaping and re-marking based on defined policies
o
Eight output Class of Service (COS) queues per port for processing qualified traffic
o
IPv4/IPv6 ACL metering
RackSwitch G8124E
8



IP v4 Layer 3 functions
o
Host management
o
IP forwarding
o
IP filtering with ACLs, up to 127 IPv4 ACLs supported
o
VRRP for router redundancy
o
Support for up to 128 static routes
o
Routing protocol support (RIP v1, RIP v2, OSPF v2, BGP)
o
Support for DHCP Relay
o
Support for IGMP snooping
o
Support for Protocol Independent Multicast (PIM) in Sparse Mode (PIM-SM) and Dense Mode
(PIM-DM).
IPv6 Layer 3 functions
o
IPv6 host management
o
IPv6 forwarding
o
Support for OSPF v3 routing protocol
o
IPv6 filtering with ACLs, up to 128 IPv6 ACLs supported
Virtualization
o
Virtual NICs (vNICs) with Ethernet, iSCSI, or FCoE traffic on vNICs
o
Virtual link aggregation groups (vLAGs)
o
VMready support
Up to 2,048 virtual entities (VEs)
Automatic VE discovery
Up to 1,024 local or distributed VM groups for VEs
NMotion™ feature for automatic network configuration migration


Converged Enhanced Ethernet
o
Priority-Based Flow Control (PFC) (IEEE 802.1Qbb) extends 802.3x standard flow control to
allow the switch to pause traffic based on the 802.1p priority value in each packet’s VLAN tag.
o
Enhanced Transmission Selection (ETS) (IEEE 802.1Qaz) provides a method for allocating link
bandwidth based on the 802.1p priority value in each packet’s VLAN tag.
o
Data Center Bridging Capability Exchange Protocol (DCBX) (IEEE 802.1AB) allows neighboring
network devices to exchange information about their capabilities.
Fibre Channel over Ethernet (FCoE)
o
FC-BB5 FCoE specification compliant
o
FCoE transit switch operations
o
FCoE Initialization Protocol (FIP) support for automatic ACL configuration
o
Link Aggregation Group (LAG) support for FCoE traffic
o
Supports 2,048 FCoE sessions with FIP Snooping by using Class ID ACLs
RackSwitch G8124E
9


Manageability
o
Industry-standard command line interface (isCLI)
o
Simple Network Management Protocol (SNMP V1, V2 and V3)
o
HTTP/HTTPS browser GUI
o
Telnet interface for CLI
o
Secure Shell (SSH) v1 and v2 for CLI
o
Secure Copy (SCP) for uploading and downloading the switch configuration via secure channels
o
Link Layer Discovery Protocol (LLDP) for discovering network devices
o
Serial interface for CLI
o
Scriptable CLI
o
Dual software images
o
Firmware image update via TFTP, FTP, and Secure FTP (sFTP)
o
Network Time Protocol (NTP) for switch clock synchronization
o
Netconf (XML)
o
Switch Center management application
Monitoring
o
Switch LEDs for port status and switch status indication
o
Remote Monitoring (RMON) agent to collect statistics and proactively monitor switch
performance
o
Port mirroring for analyzing network traffic passing through switch
o
Change tracking and remote logging with syslog feature
o
Support for sFLOW agent for monitoring traffic in data networks (separate sFLOW analyzer
required elsewhere)
The following features are not supported with IPv6:








Bootstrap Protocol (BOOTP) and DHCP
RADIUS, TACACS+ and LDAP
VMware Virtual Center (vCenter) for VMready
Routing Information Protocol (RIP)
Border Gateway Protocol (BGP)
Protocol Independent Multicast (PIM)
Virtual Router Redundancy Protocol (VRRP)
sFLOW
RackSwitch G8124E
10
Standards supported
The switch supports the following standards:



















IEEE 802.1AB Data Center Bridging Capability Exchange Protocol (DCBX)
IEEE 802.1D Spanning Tree Protocol (STP)
IEEE 802.1p Class of Service (CoS) prioritization
IEEE 802.1s Multiple STP (MSTP)
IEEE 802.1Q Tagged VLAN
IEEE 802.1Qbb Priority-Based Flow Control (PFC)
IEEE 802.1Qaz Enhanced Transmission Selection (ETS)
IEEE 802.1x port-based authentication
IEEE 802.1w Rapid STP (RSTP)
IEEE 802.3 10BASE-T Ethernet
IEEE 802.3ab 1000BASE-T copper twisted pair Gigabit Ethernet
IEEE 802.3ad Link Aggregation Control Protocol
IEEE 802.3ae 10GBASE-SR short range fiber optics 10 Gb Ethernet
IEEE 802.3ae 10GBASE-LR long range fiber optics 10 Gb Ethernet
IEEE 802.3ae 10GBASE-ER extended range fiber optics 10 Gb Ethernet
IEEE 802.3u 100BASE-TX Fast Ethernet
IEEE 802.3x Full-duplex Flow Control
IEEE 802.3z 1000BASE-SX short range fiber optics Gigabit Ethernet
IEEE 802.3z 1000BASE-LX long range fiber optics Gigabit Ethernet
Connectors and LEDs
Figure 2 shows the front panel of the RackSwitch G8124E.
Figure 2. Front panel of the RackSwitch G8124E
The front panel of the G8124E contains the following components:

LEDs that display the status of the switch and the network.

One Mini-USB RS-232 console port that provides an additional means to configure the switch.

24x SFP/SFP+ port connectors to attach SFP/SFP+ transceivers for 1 Gb or 10 Gb Ethernet
connections or DAC cables for 10 Gb Ethernet connections.

An Ethernet link OK LED and an Ethernet Tx/Rx LED for each Ethernet port on the switch.
RackSwitch G8124E
11
Figure 3 shows the rear panel of the RackSwitch G8124E.
Figure 3. Rear panel of the RackSwitch G8124E
The rear panel of the G8124E contains the following components:


Two redundant fixed AC power supplies (IEC 320-C14 power connector)
Six redundant fixed fans
Network cabling requirements
The network cables that can be used with the switch are listed in Table 4.
Table 4. G8124E network cabling requirements
Transceiver
Standard
Cable
Connector
SFP+ SR Transceiver
(46C3447)
10GBASE-SR
Up to 25 m with fiber optic cables supplied by Lenovo
(see Table 3); 850 nm OM3 multimode fiber cable (50
µ or 62.5 µ) up to 300 m or up to 400 m with OM4
multimode fiber
LC
SFP+ LR Transceiver
(90Y9412)
10GBASE-LR
1310 nm single-mode fiber cable up to 10 km
LC
SFP+ ER Transceiver
(90Y9415)
10GBASE-ER
1310 nm single-mode fiber cable up to 40 km
LC
Direct attach cable
10GSFP+Cu
SFP+ DAC cables up to 7 m (see Table 3)
SFP+
SFP RJ-45 Transceiver
(00FE333)
1000BASE-T
UTP Category 5, 5E, and 6 up to 100 meters
RJ-45
SFP SX Transceiver
(81Y1622)
1000BASE-SX
Up to 25 m with fiber optic cables supplied by Lenovo
(see Table 3); 850 nm multimode fiber cable (50 µ or
62.5 µ) up to 550 m
LC
SFP LX Transceiver
(90Y9424)
1000BASE-LX
1310 nm single-mode fiber cable up to 10 km
LC
1 GbE management ports
1000BASE-T
UTP Category 5, 5E, and 6 up to 100 meters
RJ-45
RS-232 management port
RS-232
DB-9-to-mini-USB or RJ-45-to-mini-USB console cable Mini-USB
(comes standard with the switch)
10 Gb Ethernet
1 Gb Ethernet
Management ports
RackSwitch G8124E
12
Warranty
The RackSwitch G8124E comes with a standard 3-year hardware warranty with Next Business Day
(NBD), 9x5, Customer Replaceable Unit (CRU) warranty service from Lenovo. Software Upgrade
Entitlement is based on the switch’s warranty or post warranty extension and service contracts. Optional
warranty and maintenance upgrades are available for the G8124E switch through Lenovo:

Warranty service upgrades (3, 4, or 5 years)
o
o
o

24x7 onsite repair with 4-hour target response time
24x7 onsite repair with same day target response time
9x5 onsite repair with 4-hour target response time
Maintenance (post-warranty) service offerings (1 or 2 years)
o
o
9x5 onsite repair with 4-hour target response time
9x5 onsite repair with next business day target response time
Warranty service upgrade offerings are country-specific, that is, each country might have its own service
types, service levels, response times, and terms and conditions. Not all covered types of warranty service
offerings might be available in a particular country.
For more information about the Lenovo warranty service upgrade offerings that are available in your
country, visit the ServicePac Product Selector at the following website:
https://www-304.ibm.com/sales/gss/download/spst/servicepac
Physical specifications
The approximate dimensions and weight of the G8124E switch are as follows:




Height: 44 mm (1.7 in.)
Width: 440 mm (17.3 in.)
Depth: 381 mm (15.0 in.)
Weight: 6.4 kg (14.1 lb)
Operating environment
The G8124E switch is supported in the following operating environment:







Temperature: 0 to 45 ºC (32 to 113 ºF).
Relative humidity: Non-condensing, 10 - 85%
Altitude: up to 3,049 m (10,000 feet)
Acoustic noise: Less than 65 dB
Airflow: Front-to-rear or rear-to-front cooling with redundant variable speed fans for reduced power
draw
Electrical input: 50-60 Hz, 100-240 V AC auto-switching
Typical power: 116 - 170 W
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Agency approvals
The switch conforms to the following regulations:

Safety certifications
o
o
o
o
o
o
o

Electromagnetic compatibility certifications
o
o
o
o
o
o
o
o
o

UL60950-1
CAN/CSA 22.2 No.60950-1
EN 60950-1
IEC60950-1
NOM NYCE 019
GOST R MEK 60950-1
GB4943-2001
FCC 47CFR Part 15 Class A
EN 55022 Class A
ICES-003 Class A
VCCI Class A
AS/NZS CISPR 22 Class A
CISPR 22 Class A
EN 55024
EN 300386
CE
Environmental
o
Reduction of Hazardous Substances (ROHS) 6
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Typical configurations
The following sections describe popular configurations.
Virtual Fabric configuration
Virtual Fabric is built using industry standards and is an ideal solution for customers that require more
than two NICs per server. Over the past couple of years many clients have seen their I/O requirements
per server increase anywhere from four to six to eight, or even more, NICs per server, especially with the
adoption of virtualization. Virtual Fabric allows clients the ability to use a virtual NIC approach using 10
Gb Ethernet technology to help reduce cost and complexity, and achieve better performance and more
flexibility. For example:
Reduce costs (acquisition and operating) by using fewer adapters, cables, and upstream switch
ports.
Reduce complexity: Fewer items to manage based on industry standards making thing easier to
manage with the addition of high availability and better security.
Better performance: Significantly more I/O bandwidth per server and lower latency than traditional 1
Gb Ethernet.
Flexibility: The ability to carve up a dual-port 10 GbE adapter into 4 - 8 virtual NICs and create virtual
pipes between the adapter and switch for higher availability and security. Not only can customers
dynamically allocate I/O bandwidth to each virtual NIC, Virtual Fabric also provides the ability to
change those allocations as needed. For example, a customer may have one configuration for
workload during the day and another during the evenings. Virtual Fabric has the ability to make those
changes on the fly without downtime.
Virtual Fabric (Figure 4) is designed in partnership with Emulex. The components needed for this solution
are as follows:

Emulex 10 Gb Virtual Fabric Adapters for System x
For more details, see Emulex 10Gb Virtual Fabric Adapter II and III Family for System x, TIPS0844
at:
http://www.redbooks.ibm.com/abstracts/tips0844.html

RackSwitch G8124E
Figure 4. Virtual Fabric topology
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Rack-optimized server aggregation: 10 GbE attached rack servers
Aggregation and servers are as follows:

Concentration of rack-optimized servers, for example:
o
System x or ThinkServer 1U or 2U servers with a 10 GbE adapter installed
o
BladeCenter using any of the following modules in the chassis:



o
Flex System using any of the following Ethernet modules in the chassis:



BladeCenter 1/10Gb Uplink Ethernet Switch Module
BladeCenter Virtual Fabric 10Gb Switch Module
10Gb Ethernet Pass-Thru Module for BladeCenter
Flex System EN2092
Flex System Fabric EN4093/EN4093R
Low-profile, high-performance, 24-port 10-GbE switch needed to perform aggregation function per
rack
Figure 5 shows a G8124E top-of-rack switch.
Figure 5. G8124E top-of-rack switch
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16
Table 5 lists the features and benefits of the server aggregation.
Table 5. Features and benefits
Features
Benefits
Line-rate, non-blocking, all 24-ports
Supports massive compute and virtualization
workloads.
Less than 600 nano-second latency
Faster application response times.
Support for IGMP Snooping and L3 forwarding
Enables high-bandwidth, low-latency multicast
applications.
Standards-based Layer 2/3 protocols, industry standard
CLI
Interoperates with existing network. No learning curve.
Rack-optimized server aggregation: 1 GbE attached rack servers
The design goal is a G8124E (10 GbE) switch at Distribution Layer and G8052 (1 GbE) at Edge/Access
(Figure 6):




Logical configuration: Configure G8052s for Layer 2 and apply static routes for L3 forwarding.
Full Layer 2/3 feature set: STP, MSTP, RSTP, PVRST+;RIP v1/2, static routes, OSPF.
Security: 802.1X; RADIUS/TACACS+; Wire Speed ACLs, SSH v1, v2; HTTPS Secure BBI.
QoS: Up to eight queues/port, IEEE 802.1p and DiffServ prioritization.
Figure 6. Rack-optimized server aggregation: 1 GbE attached rack servers
RackSwitch G8124E
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IP storage over 10-GbE: Changing the economics of storage
G8124E benefits for IP storage applications (Figure 7):





Lossless Ethernet Fabric
Ultra-low latency for time-sensitive disk reads/writes
Line-rate, high-bandwidth performance
Low power consumption with fewer components
Low-cost, pay-as-you-grow 10G storage network
Figure 7. G8124E benefits for IP storage over 10 GbE
RackSwitch G8124E
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Related publications and links
For more information, visit http://www-947.ibm.com/support/entry/portal/Documentation to see the
following RackSwitch G8124E product resources:





RackSwitch G8124E Installation Guide:
RackSwitch G8124E isCLI Command Reference
RackSwitch G8124E Application Guide
RackSwitch G8124E Browser-Based Interface Quick Guide
RackSwitch G8124E Menu-Based Command Reference
For more information, see the following resources:


G8124E Product Page: http://ibm.biz/Bdx4gJ
US Announcement Letter: http://ibm.biz/Bdx4gV
RackSwitch G8124E
19
Notices
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local Lenovo representative for information on the products and services currently available in your area. Any
reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product,
program, or service may be used. Any functionally equivalent product, program, or service that does not infringe
any Lenovo intellectual property right may be used instead. However, it is the user's responsibility to evaluate and
verify the operation of any other product, program, or service. Lenovo may have patents or pending patent
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Attention: Lenovo Director of Licensing
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The products described in this document are not intended for use in implantation or other life support applications
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determined in a controlled environment. Therefore, the result obtained in other operating environments may vary
significantly. Some measurements may have been made on development-level systems and there is no guarantee
that these measurements will be the same on generally available systems. Furthermore, some measurements may
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© Copyright Lenovo 2010-2015. All rights reserved.
RackSwitch G8124E
20
This document was created or updated on January 14, 2015.
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Use the online Contact us review form found at:
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
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
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The following terms are trademarks of Lenovo in the United States, other countries, or both:
BladeCenter®
Flex System®
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Lenovo®
Lenovo(logo)®
NeXtScale™
NMotion™
RackSwitch™
System x®
ThinkServer®
VMready®
Other company, product, or service names may be trademarks or service marks of others.
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