Lenovo Flex System SI4091 10Gb System Interconnect ModuleProduct Guide

Author
Updated
2 May 2017
Form Number
TIPS1196
PDF size
16 pages, 495 KB

Abstract

The Lenovo® Flex System SI4091 10Gb System Interconnect Module enables simplified, low-cost integration of Flex System™ into your networking infrastructure. The SI4091 requires no management for most data center environments, which eliminates the need to configure each networking device or individual ports, thus reducing the number of management points. It provides a low latency, loop-free interface that does not rely upon spanning tree protocols, which removes one of the greatest deployment and management complexities of a traditional switch. The SI4091 offers administrators a simplified deployment experience while maintaining the performance of intra-chassis connectivity.

This product guide provides essential pre-sales information to understand the Lenovo Flex System SI4091 10Gb System Interconnect Module, its key features and specifications, components and options, and configuration guidelines.

This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the SI4091 and consider its use in IT solutions.

Change History

Changes in the May 2 update:

  • Added SFP+ Active Optical Cables
  • Updated Storage connectivity
  • Updated documentation links

Introduction

The Lenovo® Flex System SI4091 10Gb System Interconnect Module enables simplified, low-cost integration of Flex System™ into your networking infrastructure.

The SI4091 requires no management for most data center environments, which eliminates the need to configure each networking device or individual ports, thus reducing the number of management points. It provides a low latency, loop-free interface that does not rely upon spanning tree protocols, which removes one of the greatest deployment and management complexities of a traditional switch. The SI4091 offers administrators a simplified deployment experience while maintaining the performance of intra-chassis connectivity.

The Flex System Fabric SI4091 System Interconnect Module is shown in the following figure.

Lenovo Flex System SI4091 10Gb System Interconnect Module
Figure 1. Lenovo Flex System Fabric SI4091 System Interconnect Module

Did you know?

The SI4091 provides transparent Flex System connectivity to your Cisco, Juniper, or other vendor network. The SI4091 aggregates compute node ports by appearing as a simple pass-thru device. The upstream network sees a “large pipe” of server traffic coming to and from the chassis, with the main difference being that intra-chassis switching is supported. With the SI4091, a network administration team continues to use the same network management tools that are deployed in the network to manage the connectivity from the physical servers in the chassis to the upstream network.

With support for Converged Enhanced Ethernet (CEE), the SI4091 can be used as an FCoE transit device. It also is ideal for network-attached storage (NAS) and iSCSI environments.

Key features

The SI4091 interconnect module is considered particularly suited for the following customers:

  • Customers who want simple 10 GbE network connectivity from the chassis to the upstream network, without the complexity of spanning tree and other advanced Layer 2 and Layer 3 features.
  • Customers who want to manage physical compute node connectivity in the chassis by using the existing network management tools.
  • 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 minimize oversubscription, which can result in congestion and loss of performance.
  • Customers who want to implement a converged infrastructure with NAS, iSCSI, or FCoE. For FCoE implementations, the SI4091 passes through FCoE traffic upstream to other devices (such as the Lenovo RackSwitch™ G8264CS) where the FC traffic is broken out.

The SI4091 offers the following key features and benefits:

  • Increased performance

    With the growth of virtualization and the evolution of cloud computing, many of today’s applications require low latency and high-bandwidth performance. The SI4091 supports sub-microsecond latency and up to 480 Gbps throughput, while delivering full line rate performance.

    The SI4091 also offers increased security and performance advantage when configured in VLAN-aware mode; it does not force communications upstream into the network, which reduces latency and generates less network traffic.

  • Simplified network infrastructure

    The SI4091 simplifies the deployment of a converged LAN and SAN with support for the newest protocols, including Data Center Bridging/Converged Enhanced Ethernet (DCB/CEE), which can be used in a converged iSCSI, Fibre Channel over Ethernet (FCoE) or NAS environment.

    The default configuration of the SI4091 requires little or no management for most data center environments, which eliminates the need to configure each device or individual ports and reduces the number of management points.

  • Transparent networking The SI4091 is a transparent network device that is invisible to the upstream network and eliminates network administration concerns of Spanning Tree Protocol configuration and interoperability, VLAN assignments, and avoidance of possible loops.

    By emulating a host NIC to the data center core, it accelerates the provisioning of virtual machines (VMs) by eliminating the need to configure the typical access switch parameters.

Components and connectors

The front panel of the Flex System SI4091 10Gb System Interconnect Module is shown in the following figure.

Front panel of the Lenovo Flex System SI4091 10Gb System Interconnect Module
Figure 2. Front panel of the Lenovo Flex System SI4091 10Gb System Interconnect Module

The front panel includes the following components:

  • 10x SFP/SFP+ ports to attach SFP/SFP+ transceivers for 1 GbE or 10 GbE connections or SFP+ DAC cables for 10 GbE  connections.
  • One mini-USB RS-232 console port that provides another means to configure the interconnect module.
  • 1x RJ-45 1 GbE port for out-of-band management.
  • System LEDs that display the status of the interconnect module and the network.

System specifications

The following table lists the SI4091 system specifications.

Table 1. System specifications
Component Specification
Form factor Flex System embedded I/O module
Ports
  • Internal ports: 14x 10 Gb Ethernet ports
  • External ports: 10x SFP/SFP+ ports
Media types
(external ports)
10 Gb Ethernet SFP+:
  • 10 GbE short-range (SR) SFP+ transceivers
  • 10 GbE long-range (LR) SFP+ transceivers
  • 10 GbE extended-range (ER) SFP+ transceivers
  • 10 GbE RJ-45 SFP+ transceivers
  • 10 GbE SFP+ active optical cables (AOCs)
  • 10 GbE SFP+ 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
  • Internal 10 GbE ports: 1 Gbps or 10 Gbps
  • 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, link aggregation (trunk) groups (LAGs), Hot Links, Layer 2 failover, Quality of Service (QoS), IPv4/IPv6 management, Converged Enhanced Ethernet, Fibre Channel over Ethernet (FCoE) transit switch operations.
Performance Non-blocking architecture with wire-speed forwarding of traffic:
  • Up to 480 Gbps aggregated throughput
  • 100% line rate performance with sub-microsecond switching latency
  • Up to 360 Million packets per second (Mpps)
  • Up to 9,216-byte jumbo frames
Scalability
  • MAC address forwarding database entries: 16,000
  • VLANs: 4,095
  • Link aggregation groups: 24
  • Ports in a link aggregation group: 16
Hot-swap parts SFP/SFP+ transceivers, SFP+ DAC cables.
Management ports 2x GbE internal ports connected to the chassis management module; 1x 10/100/1000 Mb Ethernet external port (RJ-45); 1x RS-232 external port (Mini-USB).
Management interfaces Industry standard command line interface (isCLI); SNMP v1 and v3. Optional Lenovo Switch Center. Optional Lenovo XClarity.
Security features Secure Shell (SSH); Secure FTP (sFTP); user level security; LDAP, RADIUS, and TACACS+ authentication; access control lists (ACLs).
Warranty One-year customer-replaceable unit limited warranty. When installed in a supported chassis, the module assumes the chassis’ base warranty and any warranty service upgrade; warranty includes Networking OS software upgrades.
Mean Time Between Failures 261,636 hours with ambient operating temperature of 40° C.
Dimensions Height: 30 mm (1.2 in.); width: 401 mm (15.8 in.); depth: 317 mm (12.5 in.)
Weight 3.7 kg (8.1 lb).

Models

The part number and feature code for ordering the SI4091 module are listed in the following table.

Table 2. Part number and feature code for ordering
Description Part number Feature code
Lenovo Flex System SI4091 10Gb System Interconnect Module 00FE327 ARZM

The part number for the interconnect module includes the following items:

  • One Lenovo Flex System SI4091 10Gb System Interconnect Module
  • Important Notices Flyer
  • Warranty Flyer
  • Documentation CD-ROM

Note: SFP/SFP+ transceivers and DAC cables are not included and should be ordered together with the interconnect module (see Transceivers and cables for details).

The interconnect module does not include a serial management cable; the optional Flex System Management Serial Access Cable (part number 90Y9338) is supported and includes two cables: a mini-USB-to-RJ45 serial cable and a mini-USB-to-DB9 serial cable, either of which can be used to connect to the interconnect module locally for configuration tasks and firmware updates.

Transceivers and cables

With the flexibility of the SI4091 module, customers can choose the following connectivity technologies:

  • For 1 GbE links, customers can use RJ-45 SFP transceivers with UTP cables up to 100 meters. Customers that need longer distances can use a 1000BASE-SX transceiver, which can drive distances up to 220 meters with 62.5 µ multimode fiber (OM1) and up to 550 meters with 50 µ multimode fiber (OM2), or the 1000BASE-LX transceivers that support distances up to 10 kilometers with single-mode fiber (1310 nm).
  • For 10 GbE links, customers can use SFP+ direct-attached copper (DAC) 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 supports 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 extended distances, the 10GBASE-ER transceivers can support distances up to 40 kilometers on single mode fiber.

The supported transceivers and cables are listed in the following table.

Table 3. Supported transceivers and DAC cables
Description Part number Feature code Maximum quantity
supported
Serial console cables
Flex System Management Serial Access Cable Kit 90Y9338 A2RR 1
SFP transceivers - 1 GbE
Lenovo 1000BASE-T (RJ-45) SFP Transceiver (no 10/100 Mbps support) 00FE333 A5DL 10
Lenovo 1000BASE-SX SFP Transceiver 81Y1622 3269 10
Lenovo 1000BASE-LX SFP Transceiver 90Y9424 A1PN 10
SFP+ transceivers - 10 GbE
Lenovo Dual Rate 1/10Gb SX/SR SFP+ Transceiver 00MY034 ATTJ 10
Lenovo 10GBASE-SR SFP+ Transceiver 46C3447 5053 10
Lenovo 10GBASE-LR SFP+ Transceiver 90Y9412 A1PM 10
Lenovo 10GBASE-ER SFP+ Transceiver 90Y9415 A1PP 10
Lenovo 10GBASE-T SFP+ Transceiver 7G17A03130 AVV1 10
Optical cables for 1 GbE SX SFP and 10 GbE SR SFP+ transceivers
Lenovo 1m LC-LC OM3 MMF Cable 00MN502 ASR6 10
Lenovo 3m LC-LC OM3 MMF Cable 00MN505 ASR7 10
Lenovo 5m LC-LC OM3 MMF Cable 00MN508 ASR8 10
Lenovo 10m LC-LC OM3 MMF Cable 00MN511 ASR9 10
Lenovo 15m LC-LC OM3 MMF Cable 00MN514 ASRA 10
Lenovo 25m LC-LC OM3 MMF Cable 00MN517 ASRB 10
Lenovo 30m LC-LC OM3 MMF Cable 00MN520 ASRC 10
SFP+ active optical cables - 10 GbE
Lenovo 1m SFP+ to SFP+ Active Optical Cable 00YL634 ATYX 10
Lenovo 3m SFP+ to SFP+ Active Optical Cable 00YL637 ATYY 10
Lenovo 5m SFP+ to SFP+ Active Optical Cable 00YL640 ATYZ 10
Lenovo 7m SFP+ to SFP+ Active Optical Cable 00YL643 ATZ0 10
Lenovo 15m SFP+ to SFP+ Active Optical Cable 00YL646 ATZ1 10
Lenovo 20m SFP+ to SFP+ Active Optical Cable 00YL649 ATZ2 10
SFP+ direct-attach cables - 10 GbE
Lenovo 1m Passive SFP+ DAC Cable 90Y9427 A1PH 10
Lenovo 1.5m Passive SFP+ DAC Cable 00AY764 A51N 10
Lenovo 2m Passive SFP+ DAC Cable 00AY765 A51P 10
Lenovo 3m Passive SFP+ DAC Cable 90Y9430 A1PJ 10
Lenovo 5m Passive SFP+ DAC Cable 90Y9433 A1PK 10
Lenovo 7m Passive SFP+ DAC Cable 00D6151 A3RH 10

The network cables that can be used with the SI4091 are listed in the following table.

Table 4. SI4091 network cabling requirements
Transceiver Standard Cable Connector
10 Gb Ethernet
10Gb SR SFP+ (46C3447)
1/10Gb SFP+ (00MY034)
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. LC
10Gb LR SFP+ (90Y9412) 10GBASE-LR 1310 nm single-mode fiber cable up to 10 km. LC
10Gb ER SFP+ (90Y9415) 10GBASE-ER 1310 nm single-mode fiber cable up to 40 km. LC
10Gb RJ-45 SFP+ (7G17A03130) 10GBASE-T UTP Category 6a or 7 up to 30 meters. RJ-45
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
1Gb RJ-45 SFP (00FE333) 1000BASE-T UTP Category 5, 5E, or 6 up to 100 meters. RJ-45
1Gb SX SFP (81Y1622)
1/10Gb SFP+ (00MY034)
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. LC
1Gb LX SFP (90Y9424) 1000BASE-LX 1310 nm single-mode fiber cable up to 10 km. LC
Management ports
1 GbE management port 1000BASE-T UTP Category 5, 5E, or 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 (comes with optional Management Serial Access Cable, 90Y9338). Mini-USB

Software features

Note: The features and specifications that are listed in this section are based on Networking OS version 8.4.

The Flex System Fabric SI4091 System Interconnect Module includes the following software features:

  • Modes of operations:
    • Transparent (or VLAN-agnostic) mode

      In VLAN-agnostic mode (default configuration), the SI4091 transparently forwards VLAN tagged frames without filtering on the customer VLAN tag, which provides an end host view to the upstream network. The interconnect module provides traffic consolidation in the chassis to minimize TOR port utilization. It also enables compute node-to-compute node communication for optimum performance (for example, vMotion). It can be connected to the FCoE transit switch or FCoE gateway (FC Forwarder) device.

    • Local Domain (or VLAN-aware) mode

      In VLAN-aware mode (optional configuration), the SI4091 provides more security for multi-tenant environments by extending client VLAN traffic isolation to the interconnect module and its external ports. VLAN-based access control lists (ACLs) can be configured on the SI4091. When FCoE is used, the SI4091 operates as an FCoE transit switch, and it should be connected to the FCF device.

  • Scalability and performance:
    • Media access control (MAC) address learning with automatic updates
    • Static and LACP (IEEE 802.3ad) link aggregation
  • Availability and redundancy:
    • Layer 2 Trunk Failover to support active/standby configurations of NIC teaming on compute nodes.
    • Hot Links provide basic link redundancy and fast recovery for network topologies without a need for Spanning Tree protocol.
  • VLAN support
    • Up to 4,095 VLANs supported, with VLAN numbers 1 - 4095 (4095 is used for management network.)
    • 802.1Q VLAN tagging support on all ports
    • Full private VLANs
  • Security:
    • VLAN-based access control lists (ACLs) (VLAN-aware mode).
    • Multiple user IDs and passwords.
    • User access control.
    • Radius, TACACS+, and LDAP authentication and authorization.
    • NIST 800-131A Encryption.
    • Selectable encryption protocol.
  • Quality of service (QoS): Support for IEEE 802.1p traffic classification and processing.
  • Converged Enhanced Ethernet:
    • Priority-Based Flow Control (PFC) (IEEE 802.1Qbb) extends 802.3x standard flow control to allow the module to pause traffic that is based on the 802.1p priority value in each packet’s VLAN tag.
    • Enhanced Transmission Selection (ETS) (IEEE 802.1Qaz) provides a method for allocating link bandwidth that is based on the 802.1p priority value in each packet’s VLAN tag.
    • 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):
    • FC-BB5 FCoE specification compliant
    • FCoE transit switch operations
    • FCoE Initialization Protocol (FIP) snooping support
  • Manageability:
    • IPv4 and IPv6 host management
    • Simple Network Management Protocol (SNMP V1 and V3)
    • Industry standard command-line interface (IS-CLI) through Telnet, SSH, and serial port
    • Secure FTP (sFTP)
    • Service Location Protocol (SLP)
    • Firmware image update (TFTP and FTP/sFTP)
    • Network Time Protocol (NTP) for clock synchronization
    • Switch Center support
    • Lenovo XClarity support
  • Monitoring:
    • LEDs for external port status and module status indication
    • Change tracking and remote logging with syslog feature
    • POST diagnostic tests

Ethernet standards

The SI4091 supports the following Ethernet standards:

  • IEEE 802.1AB Data Center Bridging Capability Exchange Protocol (DCBX)
  • IEEE 802.1p Class of Service (CoS) prioritization
  • IEEE 802.1Q Tagged VLAN (frame tagging on all ports when VLANs are enabled)
  • IEEE 802.1Qbb Priority-Based Flow Control (PFC)
  • IEEE 802.1Qaz Enhanced Transmission Selection (ETS)
  • 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 802.3ap 10GBASE-KR backplane 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
  • SFF-8431 10GSFP+Cu SFP+ Direct Attach Cable

Warranty

The SI4091 carries a 1-year, customer-replaceable unit (CRU) limited warranty. When installed in a supported chassis, these I/O modules assume your system’s base warranty and any warranty service upgrade.

Physical specifications

The SI4091 features the following approximate dimensions and weight :

  • Height: 30 mm (1.2 in.)
  • Width: 401 mm (15.8 in.)
  • Depth: 317 mm (12.5 in.)
  • Weight: 3.7 kg (8.1 lb)

The SI4091 features the following approximate shipping dimensions and weight:

  • Height: 114 mm (4.5 in.)
  • Width: 508 mm (20.0 in.)
  • Depth: 432 mm (17.0 in.)
  • Weight: 4.1 kg (9.1 lb)

Agency approvals

The SI4091 conforms to the following regulations:

  • United States FCC 47 CFR Part 15, Subpart B, ANSI C63.4 (2003), Class A
  • IEC/EN 60950-1, Second Edition
  • Canada ICES-003, issue 4, Class A
  • Japan VCCI, Class A
  • Australia/New Zealand AS/NZS CISPR 22:2006, Class A
  • Taiwan BSMI CNS13438, Class A
  • CE Mark (EN55022 Class A, EN55024, EN61000-3-2, EN61000-3-3)
  • CISPR 22, Class A
  • China GB 9254-1998
  • Turkey Communiqué 2004/9; Communiqué 2004/22
  • Saudi Arabia EMC.CVG, 28 October 2002

Chassis and adapters

The I/O modules are installed in I/O bays in the rear of the Flex System Chassis, as shown in the following figure. I/O modules are typically installed in pairs because ports on the I/O adapters that are installed in the compute nodes are routed to two I/O bays for redundancy and performance.

Location of the I/O bays in the Flex System Enterprise Chassis
Figure 3. Location of the I/O bays in the Flex System Chassis

The SI4091 interconnect modules can be installed in bays 1, 2, 3, and 4 of the Flex System chassis. A supported adapter must be installed in the corresponding slot of the compute node. Although an adapter can use up to four ports to connect to the respective I/O module bay, the SI4091 can use only one of the four ports.

In compute nodes that have an integrated dual-port 10 GbE network interface controller (NIC), NIC ports are routed to bays 1 and 2 with a specialized periscope connector (the adapter card is not required). However, the periscope connector can be replaced with the adapter when needed. In such a case, integrated NIC is disabled.

The following table shows compatibility information for the SI4091 and Flex System chassis.

Table 5. Flex System chassis compatibility
Description Part number Enterprise Chassis with CMM Enterprise Chassis with CMM2 Carrier-grade Chassis with CMM2
Flex System SI4091 10Gb System Interconnect Module 00FE327 No Yes No

The midplane connections between the adapters that are installed in the compute nodes to the I/O module bays in the chassis are listed in the following table. Half-wide compute nodes support up to two adapters, and full-wide compute nodes support up to four adapters.

Table 6. Adapter to I/O bay correspondence
I/O adapter slot
in the compute node
Port on the adapter Corresponding I/O bay in the chassis
Bay 1 Bay 2 Bay 3 Bay 4
Slot 1 Port 1 Yes      
Port 2   Yes    
Slot 2 Port 1     Yes  
Port 2       Yes
Slot 3
(full-wide compute nodes only)
Port 1 Yes      
Port 2   Yes    
Slot 4
(full-wide compute nodes only)
Port 1     Yes  
Port 2       Yes

The I/O adapters that are supported by the SI4091 are listed in the following table.

Table 7. Network adapters
Description Part number Feature code
10 Gb Ethernet
Embedded 10Gb Virtual Fabric Adapter (2-port)* None None
Flex System CN4052 2-port 10Gb Virtual Fabric Adapter 00JY800 A5RP
Flex System CN4052S 2-port 10Gb Virtual Fabric Adapter 00AG540 ATBT
Flex System CN4054 10Gb Virtual Fabric Adapter (4-port) 90Y3554 A1R1
Flex System CN4054R 10Gb Virtual Fabric Adapter (4-port) 00Y3306 A4K2
Flex System CN4054S 4-port 10Gb Virtual Fabric Adapter 00AG590 ATBS
Flex System EN4132 2-port 10Gb Ethernet Adapter 90Y3466 A1QY
Flex System EN4172 2-port 10Gb Ethernet Adapter 00AG530 A5RN
1 Gb Ethernet
Embedded 1 Gb Ethernet controller (2-port)** None None
Flex System EN2024 4-port 1Gb Ethernet Adapter 49Y7900 A10Y

* The Embedded 10Gb Virtual Fabric Adapter is built into select compute nodes.
** The Embedded 1 Gb Ethernet controller is built into select compute nodes.

Network connectivity

The most common SI4091 connectivity topology, which can be used with both Lenovo and non-Lenovo upstream network devices, is shown in the following figure.

SI4091 connectivity topology: Link Aggregation
Figure 4. SI4091 connectivity topology: Link Aggregation

In this loop-free redundant topology, each SI4091 is physically connected to a separate Top-of-Rack (ToR) switch with static or LACP aggregated links.

When the SI4091 is used with the Lenovo RackSwitch switches, Virtual Link Aggregation Groups (vLAGs) can be used for load balancing and redundancy purposes. The virtual link aggregation topology with the Lenovo RackSwitch G8272 is shown in the following figure.

SI4091 connectivity topology - Virtual Link Aggregation
Figure 5. SI4091 connectivity topology: Virtual Link Aggregation

In this loop-free topology, aggregation is split between two physical switches, which appear as a single logical switch. Each SI4091 is connected to ToR switches through static or LACP aggregated links.

Dual isolated SAN fabrics: If you plan to use FCoE in a dual isolated SAN fabric design approach (also known as SAN air gaps), consider the SI4091 connectivity topology shown in Figure 4 (Link Aggregation).

The following table lists the 10 Gb Ethernet network switches that are offered by Lenovo that can be used with the SI4091 interconnect module in Flex System network connectivity solutions.

Table 8. Network switches
Description Part number
10 Gb Ethernet switches
Lenovo RackSwitch G8124E (Rear to Front) 7159BR6
Lenovo RackSwitch G8264 (Rear to Front) 7159G64
Lenovo RackSwitch G8272 (Rear to Front) 7159CRW
Lenovo RackSwitch G8296 (Rear to Front) 7159GR6
10 Gb Converged switches
Lenovo RackSwitch G8264CS (Rear to Front)* 7159DRX

* The SI4091 supports FCoE transit switch operations when connected to the RackSwitch G8264CS.

For more information, see the list of Product Guides in the Top-of-rack Switches category:
http://lenovopress.com/servers/options/switches

Storage connectivity

The SI4091 interconnect module can be used for external NAS, iSCSI, or FCoE SAN storage connectivity. The following table lists the external storage systems that are offered by Lenovo that can be used with the SI4091 interconnect module in storage connectivity solutions.

Table 9. External storage systems
Description Part number
Lenovo Storage DX8200 Series (NAS, iSCSI connectivity)
Lenovo Storage DX8200D ServerSAN Entry, 8TB, 3yr SW S&S 5135D2x#
Lenovo Storage DX8200D ServerSAN Entry, 8TB, 4yr SW S&S 5135N2x#
Lenovo Storage DX8200D ServerSAN Entry, 8TB, 5yr SW S&S 51354Vx#
Lenovo Storage DX8200D ServerSAN Mid, 16TB, 3yr SW S&S 5135F2x#
Lenovo Storage DX8200D ServerSAN Mid, 16TB, 4yr SW S&S 5135P2x#
Lenovo Storage DX8200D ServerSAN Mid, 16TB, 5yr SW S&S 51355Vx#
Lenovo Storage DX8200D ServerSAN High, 32TB, 3yr SW S&S 5135G2x#
Lenovo Storage DX8200D ServerSAN High, 32TB, 4yr SW S&S 5135Q2x#
Lenovo Storage DX8200D ServerSAN High, 32TB, 5yr SW S&S 51356Vx#
Lenovo Storage DX8200D Storage Virtualization Entry, 4TB, 3yr SW S&S 5135A2x#
Lenovo Storage DX8200D Storage Virtualization Entry, 4TB, 4yr SW S&S 5135J2x#
Lenovo Storage DX8200D Storage Virtualization Entry, 4TB, 5yr SW S&S 51351Vx#
Lenovo Storage DX8200D Storage Virtualization Mid, 16TB, 3yr SW S&S 5135B2x#
Lenovo Storage DX8200D Storage Virtualization Mid, 16TB, 5yr SW S&S 51352Vx#
Lenovo Storage DX8200D Storage Virtualization Mid, 16TB, 4yr SW S&S 5135L2x#
Lenovo Storage DX8200D Storage Virtualization High, 64TB, 3yr SW S&S 5135C2x#
Lenovo Storage DX8200D Storage Virtualization High, 64TB, 4yr SW S&S 5135M2x#
Lenovo Storage DX8200D Storage Virtualization High, 64TB, 5yr SW S&S 51353Vx#
Lenovo Storage DX8200N with 1x N2226 HBA (Requires a supported external drive enclosure) 5128A1x#
Lenovo Storage DX8200N with 2x N2226 HBAs (Requires a supported external drive enclosure) 5128A2x#
Lenovo Storage S Series (iSCSI connectivity)
Lenovo Storage S2200 LFF Chassis FC/iSCSI Single Controller, Rack Kit, 9x5NBD 64114B1
Lenovo Storage S2200 LFF Chassis FC/iSCSI Dual Controller, Rack Kit, 9x5NBD 64114B2
Lenovo Storage S2200 SFF Chassis FC/iSCSI Single Controller, Rack Kit, 9x5NBD 64114B3
Lenovo Storage S2200 SFF Chassis FC/iSCSI Dual Controller, Rack Kit, 9x5NBD 64114B4
Lenovo Storage S3200 LFF Chassis FC/iSCSI Single Controller, Rack Kit, 9x5NBD 64116B1
Lenovo Storage S3200 LFF Chassis FC/iSCSI Dual Controller, Rack Kit, 9x5NBD 64116B2
Lenovo Storage S3200 SFF Chassis FC/iSCSI Single Controller, Rack Kit, 9x5NBD 64116B3
Lenovo Storage S3200 SFF Chassis FC/iSCSI Dual Controller, Rack Kit, 9x5NBD 64116B4
Lenovo Storage V Series (iSCSI connectivity, end-to-end FCoE connectivity, FCoE/FC gateway connectivity)
Lenovo Storage V3700 V2 LFF Control Enclosure 6535C1D
Lenovo Storage V3700 V2 LFF Control Enclosure (Top Seller) 6535EC1
Lenovo Storage V3700 V2 SFF Control Enclosure 6535C2D
Lenovo Storage V3700 V2 SFF Control Enclosure (Top Seller) 6535EC2
Lenovo Storage V3700 V2 XP LFF Control Enclosure 6535C3D
Lenovo Storage V3700 V2 XP LFF Control Enclosure (Top Seller) 6535EC3
Lenovo Storage V3700 V2 XP SFF Control Enclosure 6535C4D
Lenovo Storage V3700 V2 XP SFF Control Enclosure (Top Seller) 6535EC4
Lenovo Storage V5030 LFF Control Enclosure 3Yr S&S 6536C12
Lenovo Storage V5030 LFF Control Enclosure 5Yr S&S 6536C32
Lenovo Storage V5030 SFF Control Enclosure 3Yr S&S 6536C22
Lenovo Storage V5030 SFF Control Enclosure 5Yr S&S 6536C42
Lenovo Storage V5030F SFF Control Enclosure 3Yr S&S 6536B1F
Lenovo Storage V5030F SFF Control Enclosure 5Yr S&S 6536B2F
IBM Storwize for Lenovo (iSCSI connectivity, end-to-end FCoE connectivity, FCoE/FC gateway connectivity)
IBM Storwize V3500 3.5-inch Dual Control Storage Controller Unit 6096CU2^
IBM Storwize V3500 2.5-inch Dual Control Storage Controller Unit 6096CU3^
IBM Storwize V3700 3.5-inch Storage Controller Unit 6099L2C
IBM Storwize V3700 2.5-inch Storage Controller Unit 6099S2C
IBM Storwize V3700 2.5-inch DC Storage Controller Unit 6099T2C
IBM Storwize V7000 2.5-inch Storage Controller Unit, w/3 Yr S&S (Model 524) 6195SC5†
IBM Storwize V7000 2.5-inch Storage Controller Unit, w/3 Yr S&S (LA) (Model 524) 6195SCL‡
IBM Storwize V7000 2.5-inch Storage Controller Unit, w/5 Yr S&S (Model 524) 61951F1†
IBM Storwize V7000 2.5-inch Storage Controller Unit, w/5 Yr S&S (LA) (Model 524) 61951FL‡
IBM Storwize V7000 SFF Control Enclosure, 3YR SWMA (Model HC1 [Gen2+]) 6195C32†
IBM Storwize V7000 SFF Control Enclosure, 3YR SWMA, LA (Model HC1 [Gen2+]) 6195C3L‡
IBM Storwize V7000 SFF Control Enclosure, 5YR SWMA (Model HC1 [Gen2+]) 6195C52†
IBM Storwize V7000 SFF Control Enclosure, 5YR SWMA, LA (Model HC1 [Gen2+]) 6195C5L‡

* Available worldwide (except China and Japan).
^ Available only in China.
** Available only in Japan.
# x represents a geo-specific letter (for example: U = North America, G = EMEA). Ask a Lenovo representative for specifics.
† Available worldwide except Latin America.
‡ Available only in Latin America.

For FCoE storage connectivity, the SI4091 interconnect module transports encapsulated FCoE packets to the Fibre Channel Forwarder (FCF), which provides end-to-end 10 Gb FCoE connectivity for storage systems with native FCoE ports or FCoE/FC gateway connectivity for storage systems with native FC ports.

The SI4091 interconnect module can be connected to the following converged switches for FCoE connectivity:

  • Lenovo RackSwitch™ G8264CS
  • Brocade VDX 6740

For more information, see the list of Product Guides in the following categories:

Related product families

Product families related to this document are the following: