Lenovo Flex System EN4091 10Gb Ethernet Pass-thru User Guide

: June 3, 2024
: Lenovo

Table of Contents

Did you know?
Part number information
Supported transceivers and cables
Benefits
Features and specifications
Supported standards
Supported chassis and adapter cards
Connectors and LEDs
Network cabling requirements
Warranty
Physical specifications
Agency approvals
Typical configurations
Related publications and links
Related product families
Notices
References
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Lenovo Flex System EN4091 10Gb Ethernet Pass-thru User Guide

The Lenovo® Flex System™ EN4091 10Gb Ethernet Pass-thru offers easy connectivity of the Flex System chassis to any external network infrastructure. This unmanaged device enables direct Ethernet connectivity of the compute node in the chassis to an external top-of-rack (TOR) data center switch. This module can function at both 1 Gb and 10 Gb Ethernet speeds. It has fourteen internal 1 Gb or 10 Gb links, and fourteen external 1 Gb or 10 Gb SFP+ uplinks.

The following figure shows the Lenovo Flex System EN4091 10Gb Ethernet Pass- thru.

Figure 1. Lenovo Flex System EN4091 10Gb Ethernet Pass-thru

Did you know?

The Lenovo Flex System EN4091 10Gb Ethernet Pass-thru module provides 14 internal and 14 external 10 Gb Ethernet ports, and it supports 1 Gb and 10 Gb Ethernet signaling for Converged Enhanced Ethernet (CEE), Fibre Channel over Ethernet (FCoE), and other Ethernet-based transport protocols.

Part number information

The Lenovo Flex System EN4091 10Gb Ethernet Pass-thru has 14 internal and 14 external ports that can operate at 1 Gb or 10 Gb Ethernet speeds. The following table shows the part numbers for ordering the Pass-thru module.

Table 1. Part numbers and feature codes for ordering

Description	Part number	Feature code
Lenovo Flex System EN4091 10Gb Ethernet Pass-thru	88Y6043	A1QV

The part number for the Lenovo Flex System EN4091 10Gb Ethernet Pass-thru, 88Y6043, includes the following items:

One Lenovo Flex System EN4091 10Gb Ethernet Pass-thru module
Documentation package

Note: SFP and SFP+ transceivers or cables are not included with the module.

Supported transceivers and cables

With the flexibility of the Flex System EN4091 10Gb Ethernet Pass-thru Module, clients can take advantage of the technologies that they require for multiple environments:

For 1 GbE external 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 external links, clients can use SFP+ direct attach copper (DAC) cables for in-rack cabling and distances up to 5 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.
The 10GBASE-LR transceivers can support distances up to 10 kilometers on single mode fiber.

The following table lists the supported transceivers.

Table 1. Supported transceivers

Part number	Feature code	Description

1Gb transceivers
00FE333| A5DL| SFP 1000Base-T (RJ-45) Transceiver
81Y1622| 3269| SFP SX Transceiver
90Y9424| A1PN| SFP LX Transceiver
10Gb transceivers
46C3447| 5053| SFP+ SR Transceiver
90Y9412*| A1PM| SFP+ LR Transceiver

The following table lists the supported fiber optic cables.

Table 2. Optical cables

Part number	Feature code	Description

The following table lists the supported direct-attach copper (DAC) cables.

Table 3. Copper cables

Part number	Feature code	Description

SFP+ 10Gb Passive DAC Cables
00D6288| A3RG| 0.5m Passive DAC SFP+ Cable
90Y9427| A1PH| 1m Passive DAC SFP+ Cable
00AY764| A51N| 1.5m Passive DAC SFP+ Cable
00AY765| A51P| 2m Passive DAC SFP+ Cable
90Y9430| A1PJ| 3m Passive DAC SFP+ Cable
90Y9433| A1PK| 5m Passive DAC SFP+ Cable
SFP+ 10Gb Active DAC Cables
95Y0323| A25A| 1m Active DAC SFP+ Cable
95Y0326| A25B| 3m Active DAC SFP+ Cable
95Y0329*| A25C| 5m Active DAC SFP+ Cable
SFP+ 10Gb Active DAC Cables
00VX111| AT2R| Lenovo 1m Active DAC SFP+ Cables
00VX114| AT2S| Lenovo 3m Active DAC SFP+ Cables
00VX117| AT2T| Lenovo 5m Active DAC SFP+ Cables

Benefits

The Flex System EN4091 10Gb Ethernet Pass-thru Module is particularly suited for the following clients:

Clients who require direct connectivity of the compute nodes in the chassis to an external TOR data center switch
Clients who are implementing a converged environment
Clients who want to reduce total cost of ownership (TCO) and improve performance, while maintaining high levels of availability and security
Clients who want to avoid oversubscription, which can result in congestion and loss of performance

Features and specifications

The Flex System EN4091 10Gb Ethernet Pass-thru Module has the following features and specifications:

Internal ports: Fourteen internal full-duplex Ethernet ports that can operate at 1 Gb or 10 Gb speeds.
External ports: Fourteen ports for 1 Gb or 10 Gb Ethernet SFP+ transceivers (support for 1000BASESX, 1000BASE-LX, 1000BASE-T, 10GBASE-SR, or 10GBASE-LR) or SFP+ copper direct-attach copper (DAC) cables. SFP+ modules and DAC cables are not included and must be purchased separately.
An unmanaged device that has no internal Ethernet management port, but is able to provide its vital product data (VPD) to the secure management network in the Chassis Management Module.

Supported standards

The module supports the following IEEE standards:

IEEE 802.3ab 1000BASE-T copper twisted pair Gigabit Ethernet
IEEE 802.3z 1000BASE-SX short range fiber optics Gigabit Ethernet
IEEE 802.3z 1000BASE-LX long range fiber optics Gigabit Ethernet
IEEE 802.3ae 10GBASE-SR short range fiber optics 10 Gb Ethernet
IEEE 802.3ae 10GBASE-LR long range fiber optics 10 Gb Ethernet
10GSFP+Cu SFP+ Direct Attach copper

Supported chassis and adapter cards

The pass-thru 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 normally installed in pairs because ports on the I/O adapter cards installed in the compute nodes are routed to two I/O bays for redundancy and performance.

Figure 2. Location of the I/O module bays in the Flex System chassis

The EN4091 10Gb Ethernet Pass-thru Module can be installed in bays 1, 2, 3, and 4 of the chassis. Up to four EN4091 modules are supported in a chassis. A supported Ethernet adapter must be installed in the corresponding slot of the compute node.

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, and the adapter card is not required.
However, when needed, the periscope connector can be replaced with the adapter card. In that case, an integrated NIC is disabled.

The following table shows compatibility information for the EN4091 and Flex System chassis.

Table 3. Flex System chassis compatibility

Description| Part number| Enterprise Chassis with CMM| Enterprise Chassis with CMM2| Carrier-grade Chassis with CMM2
---|---|---|---|---
Flex System EN4091 10Gb Ethernet Pass-thru| 88Y6043| Yes| Yes| No

The connections between the adapters installed in the compute nodes to the EN4091 modules installed in the chassis are shown in the following figure. The figure shows both half-wide servers, such as the x240 with two adapters, and full-wide servers, such as the x440 with four adapters.

Figure 3. Logical layout of the interconnects between I/O adapters and EN4091 modules

The following table shows the connections between the adapters installed in the compute nodes to the I/O module bays in the chassis.

4-port and 8-port adapters: With 4-port 1 GbE or 10 GbE or 8-port 10 GbE adapters, only up to two adapter ports can be used with the EN4091 pass-thru modules (one port per pass-thru module).

Table 4. Adapter to I/O bay correspondence

I/O adapter slot in the server| Port on the adapter| Corresponding I/O module 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 following table lists the I/O adapters supported by the EN4091 10Gb Ethernet Pass-thru Modules.

Table 5. Network adapters

Description	Part number	Feature code

The adapters are installed in slots in each compute node. The following figure shows the locations of the slots in the x240 Compute Node. The positions of the adapters in the other supported servers are similar.

Figure 4. Location of the I/O adapter slots in the Flex System x240 Compute Node

Connectors and LEDs

The following figure shows the front panel of the Flex System EN4091 10Gb Ethernet Pass-thru Module.

Figure 5. Front panel of the Flex System EN4091 10Gb Ethernet Pass-thru

The front panel has the following components:

LEDs that show the status of the module and the network:
- The OK LED indicates that the module has passed the power-on self-test (POST) with no critical faults and is operational.
- The blue Identify LED is used to identify the module physically by using the management software to illuminate it.
- The error LED (pass-thru module error) indicates that the module has failed the POST or detected an operational fault.
Fourteen external SFP/SFP+ ports for 1 Gb or 10 Gb connections to external Ethernet devices.
An Ethernet link OK LED and an Ethernet Tx/Rx LED for each external port on the module.

Network cabling requirements

The network cables that can be used with the Flex System EN4091 10Gb Ethernet Pass-thru Module are shown in the following table.

Table 6. G8052 network cabling requirements

Transceiver	Standard	Cable	Connector

10 Gb Ethernet
10GBASE-SR SFP+ Transceiver (46C3447)| 10GBASE- SR| Up to 30 m with fiber optic cables supplied by Lenovo (see Table 2); 850 nm OM3 multimode fiber cable up to 300 m or up to 400 m with OM4 multimode fiber| LC
10GBASE-LR SFP+ Transceiver (90Y9412)| 10GBASE- LR| 1310 nm single-mode fiber cable up to 10 km| LC
Direct attach cable| 10GSFP+Cu| SFP+ DAC cables up to 5 m (see Table 2)| SFP+
1 Gb Ethernet
1000BASE-T SFP Transceiver (00FE333)| 1000BASE- T| UTP Category 5, 5E, and 6 up to 100 meters| RJ-45
1000BASE-SX SFP Transceiver (81Y1622)| 1000BASE- SX| Up to 30 m with fiber optic cables supplied by Lenovo (see Table 2); 850 nm multimode fiber cable up to 550 m (50 µ) or up to 220 m (62.5 µ)| LC
1000BASE-LX SFP
Transceiver (90Y9424)| 1000BASE- LX| 1310 nm single-mode fiber cable up to 10 km| LC

Warranty

The EN4091 carries a 1-year, customer-replaceable unit (CRU) limited warranty. When installed in a chassis, these I/O modules assume your system’s base warranty and any Lenovo warranty service upgrade.

Physical specifications

These are the approximate dimensions and weight of the Flex System EN4091 10Gb Ethernet Pass-thru:

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)

Shipping dimensions and weight (approximate):

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 Flex System EN4091 10Gb Ethernet Pass-thru 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 Communique 2004/9; Communique 2004/22
Saudi Arabia EMC.CVG, 28 October 2002

Typical configurations

The following usage scenarios are described:

EN4091 in the traditional 10 Gb Ethernet network
EN4091 in the converged NAS or iSCSI network
EN4091 in the converged FCoE network

EN4091 in the traditional 10 Gb Ethernet network

In the traditional 10 GbE network, the EN4091 pass-thru modules are connected to the TOR switches (such as the Lenovo RackSwitch G8272) through the 10 GbE SFP+ ports, as shown in the following figure.

Figure 6. EN4091 in the 10 GbE network

EN4091 in the converged NAS or iSCSI network

The EN4091 pass-thru module can be connected to a TOR switch (such as the Lenovo RackSwitch G8272) that can transport iSCSI and NFS/CIFS data blocks with support for Converged Enhanced Ethernet (CEE).
The example scenario with NAS and iSCSI storage protocols is shown in the following figure.

Figure 7. EN4091 in the converged NAS or iSCSI network

EN4091 in the converged FCoE network

With FCoE, the EN4091 pass-thru can be connected to a converged TOR switch that supports Fibre Channel Forwarder (FCF) capability (such as the Lenovo RackSwitch G8264CS). The FCF provides capability to connect FCoE storage targets via native FCoE interfaces (end-to end FCoE) or through FC/FCoE gateways that break out the FC connections and connect to the SAN switches and then in to the storage devices.

The example scenario with end-to-end FCoE is shown in the following figure.

Figure 8. EN4091 in the converged FCoE network: End-to-end FCoE

The example scenario with the FC/FCoE gateway is shown in the following figure.

Figure 9. EN4091 in the converged FCoE network: FC/FCoE gateway

Note: For a full listing of supported FCoE and iSCSI configurations, see the System Storage Interoperation Center (SSIC) website at: http://ibm.com/systems/support/storage/ssic

For more information, see the following Flex System EN4091 10Gb Ethernet Pass- thru Module product publications, available from the Flex System Information Center:
http://publib.boulder.ibm.com/infocenter/flexsys/information/index.jsp

Installation and User’s Guide

Here are other useful references:

Flex System Information Center
http://publib.boulder.ibm.com/infocenter/flexsys/information
Flex System Interoperability Guide
http://lenovopress.com/fsig
Flex System Products and Technology , SG24-8255
http://lenovopress.com/sg248255
Product Guides for Flex System
http://lenovopress.com/flexsystem

Product families related to this document are the following:

Notices

Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your 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 applications covering subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:

Lenovo (United States), Inc.
8001 Development Drive
Morrisville, NC 27560
U.S.A.
Attention: Lenovo Director of Licensing

LENOVO PROVIDES THIS PUBLICATION ”AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.

This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.

The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications or warranties. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties. All information contained in this document was obtained in specific environments and is presented as an illustration. The result obtained in other operating environments may vary. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk. Any performance data contained herein was 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 have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.

This document, TIPS0865, was created or updated on September 27, 2020.

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