Cisco UCS 6500 Series Fabric Interconnect Hardware Installation Guide - Connecting the Fabric Interconnect [Cisco UCS 6536 Fabric Interconnect] (2023)

This chapter contains the following topics:

Network Connections Overview

After installing the fabric interconnect in a rack and powering it on, you are ready to make the following network connections:

  • Console connection – This is a direct local management connection that you use to initially set up the fabric interconnect. You must first make this connection to initially configure the fabric interconnect and determine its IP address, which is required for the other connections.

  • Management connection – Once you complete the initial configuration using a console, you can make this connection to manage all future fabric interconnect configurations.

  • Uplink and Downlink interface connections: These are connections to hosts and servers on the network.

Each of these connection types is explained in one of the following sections.

Cisco UCS 6500 Series Fabric Interconnect Hardware Installation Guide - Connecting the Fabric Interconnect [Cisco UCS 6536 Fabric Interconnect] (1)

When routing cables in overhead or underground cable trays, we recommend that you route power cables and other potential sources of noise as far as possible from the network cabling that terminates at Cisco equipment. In situations where long parallel cables cannot be separated by at least 3.3 feet (1 meter), we recommend shielding any potential noise sources by placing them in grounded metal conduit.

Connecting a Console to Fabric Interconnect

Before you can create a network management connection to the fabric interconnect or connect the fabric interconnect to the network, you must create a local management connection through a console terminal. Then configure an IP address for the fabric interconnect. You can use the console to perform the following functions, each of which can be performed through the management interface after making this connection:

This local management connection is made between the asynchronous serial port on a supervisor module and a console device capable of asynchronous transmission. Usually you can use a computer terminal as a console device. In the supervisor modules the serial port of the console is used.

Cisco UCS 6500 Series Fabric Interconnect Hardware Installation Guide - Connecting the Fabric Interconnect [Cisco UCS 6536 Fabric Interconnect] (2)

Before connecting the console port to a computer terminal, make sure that the computer terminal supports VT100 terminal emulation. Terminal emulation software enables communication between the Fabric Interconnect and the computer during installation and configuration.

Before you start

  • The fabric interconnect must be fully installed in its rack, which is connected to a power source and grounded.

  • The necessary cabling for console, management, and network connections must be available.

    • An RJ-45 rollover cable included in the Mesh Interconnect Accessory Kit.

    • Network cabling is routed to the installed fabric interconnect location.


Paso 1

Configure the console device to match the following standard port characteristics:

  • 9600 fines

  • 8 bits of data

  • 1 stop bit

  • sin by

paso 2

Connect an RJ-45 rollover cable to the console port on the fabric interconnect.

You can find this cable in the accessory kit.

stage 3

Route the RJ-45 rollover cable to the console or modem.

Stage 4

Connect the other end of the RJ-45 rollover cable to the console or to a modem.

Management interface configuration

RJ-45 and/or SFP management ports provide out-of-band management, allowing you to use the command line interface (CLI) to manage the fabric interconnect by its IP address. You can use one of these ports depending on the cable and connectors you are using to connect the management interface to the network.

Before you start

  • The fabric interconnect must be activated.

  • The fabric interconnect must initially be configured using a console.


Paso 1

Connect the management cable with RJ-45 connectors to the management port on the fabric interconnect.


Use only one of these management ports: Fabric Interconnect does not support the use of both management ports.

paso 2

Connect the other end of the cable to a 10/100/1000 RJ-45 port on a network device.

Connecting interface ports to other devices

Connections and Transceivers

After performing the initial Fabric Interconnect configuration and creating a management connection, you are ready to connect the Fabric Interconnect interface ports to other devices. Depending on the types of interface ports on Fabric Interconnect, you will need to use interface cables with QSFP28, QSFP+, SFP+, SFP transceivers, or RJ-45 connectors to connect Fabric Interconnect to other devices.

Cisco UCS 6500 Series Fabric Interconnect Hardware Installation Guide - Connecting the Fabric Interconnect [Cisco UCS 6536 Fabric Interconnect] (3)

If you need to use SFP+ or SFP transceivers on a QSFP+ or QSFP28 uplink port, install a QSFP to SFP adapter, such as the CVR-QSFP-SFP10G adapter, on the QSFP port, then install the SFP+ or SFP transceiver. The fabric interconnect automatically sets the port speed to the speed of the installed transceiver.

If the transceivers you are using can be separated from their optical cables, install the transceivers without their cables before inserting the cables into the transceivers. This helps extend the life of the transceiver and cables. When removing transceivers from the mesh interconnect, it is best to first remove the optical cable and then remove the transceiver.

To determine which transceivers, adapters, and cables are compatible with this fabric interconnect, see theCisco Transceiver Module CompatibilityInformation document.

Peer connections and devices

Fabric Interconnect connects to peer devices in the following ways:

  • IOM and IFM on UCS B-Series Blade Chassis Systems and UCS X-Series Compute Node Systems.

  • FEX modules in UCS Series C rack servers.

  • Direct connection to UCS Series C rack servers.

Mesh Interconnect Configuration

The Cisco UCS 6500 Series Fabric Interconnect can be configured and managed using supported Cisco management platforms, such as the Cisco Intersight Management Platform in Intersight Managed Mode (Cisco Intersight Managed Mode). For more details, see theCisco Intersight Managed Mode Configuration Guide, which is available at the following URL:Cisco Intersight Managed Mode Configuration Guide.

Fabric Interconnect Port Configuration

types of doors

The Cisco UCS 6500 Series Fabric Interconnect has the following ports that must be configured through supported Cisco management platforms:

  • Server Port – A port connected to the adapter on a UCS B-series or C-series server. This is typically a converged port that can carry Ethernet and FCoE traffic.

  • Uplink port: Also called border port. An uplink port is an Ethernet port that connects to a northbound LAN aggregation switch.

  • FC Uplink Port: An FC port that is connected to an FC uplink fabric. For example, an MDS switch FC interface.

  • FCoE Uplink Port – An FCoE port that is connected to an FCoE uplink fabric. For example, an MDS switch FCoE interface.

  • Device Port – An Ethernet server port that is directly connected to the disk array. This configuration requires FI to be in Ethernet-End-Host mode.

  • Unified Storage Port – This is an Ethernet server port that also supports FCoE and is directly connected to a disk array. This supports FCoE, iSCSI, NFS, and CIFS (for example, NetApp Storage and Unified Target Adapter). Note that this port is also called a unified device port.

    Cisco UCS 6500 Series Fabric Interconnect Hardware Installation Guide - Connecting the Fabric Interconnect [Cisco UCS 6536 Fabric Interconnect] (4)

    FCoE storage ports are not supported.

  • Monitor Port: The port that supports SPAN.

port settings

The following table shows the types of ports that can be configured. For port type definitions, see the previous section.

chassis door

port speed

Supported port type

1 a 32


Ethernet nativa

  • Upward Enlace Ethernet port

  • FCoE uplink port

  • Device port (EHM only)

  • porta monitor

9 y 10


Ethernet nativa

Upward Enlace Ethernet port

1 a 36


Ethernet nativa

server ports

33 a 36


native FC

  • FC uplink port

  • FC storage port


The 4 FC Breakout ports of a QSFP port must be set to 32G, 16G or 8G. So in other words, FC connection ports of the same QSFP port cannot have different speeds.


Ethernet nativa

  • Upward Enlace Ethernet port

  • service port

  • FCoE uplink port

  • Device port (EHM only)

  • porta monitor

escape door

Port cracking is supported in the following configurations.

break level

Gates 1 to 8 (QSFP28)

Porta 9 - a 36 (QSFP28)

4x8G FC


Yes, only on ports 33 to 36

4x16G FC


Yes, only on ports 33 to 36

4x32G FC


Yes, only on ports 33 to 36













1x25G (Cisco QSA28 con SFP28)

Sim (QSA28)

Sim (QSA28)

1x10G QSA o QSA28 con SFP+ Sim (QSA28)

Sim (QSA28)

1G (Cisco QSA con SFP y SFP+)


Yes, only ports 9 and 10

Ports 11 to 36, no

Migrating a Cisco 6400 Series Fabric Interconnect to a Cisco 6500 Series Fabric Interconnect

Migration from a Cisco 6400 Series Fabric Interconnect to a Cisco 6500 Series Fabric Interconnect is supported.

Cisco Intersight Managed Mode is required to migrate to 6500 Series Fabric Interconnects.

To migrate from a Cisco UCS 6400 Series Fabric Interconnect to a Cisco 6500 Series Fabric Interconnect, see "Migrating to Cisco UCS 6500 Series Fabric Interconnects" onCisco Intersight Managed Mode Configuration Guide.


What is Fabric Interconnect in Cisco UCS? ›

The UCS fabric interconnect is a core part of Cisco's Unified Computing System, which is designed to improve scalability and reduce the total cost of ownership of data centers by integrating all components into a single platform, which acts as a single unit.

How does Fabric Interconnect work? ›

Each Fabric Interconnect is typically configured as a highly available clustered pair in production environments and provide active-active data traffic. By deploying in pairs, each server or blade chassis is connected to both Fabric Interconnects to protect against FI failure.

Which is the latest generation of fabric interconnects we have? ›

This third generation Fabric Interconnect enables a high-performance, low latency and lossless fabric architecture to address the requirements for deploying high capacity datacenters.

How do I upgrade my Fabric Interconnect? ›

Procedure. From the left navigation pane, click Fabric Interconnects, select a Fabric Interconnect, and perform an Upgrade Firmware action on it. On the Upgrade Firmware page, click Start.

What is the difference between fabric interconnect and switch? ›

The most significant difference is that each connection is always active. These fabric interconnects typically have more bandwidth than traditional switches, too. What makes these fabric interconnects so special is the management software built into them. The UCS management platform is Cisco's special sauce.

What is required to cluster a pair of fabric interconnects? ›

To use the cluster configuration, the two fabric interconnects must be directly connected together using Ethernet cables between the L1 (L1-to-L1) and L2 (L2-to-L2) high availability ports, with no other fabric interconnects in between.

What is a Cisco fabric switch? ›

The switch fabric is the core of the Cisco CRS 4-slot line card chassis. The switch fabric is implemented through switch fabric cards installed in the chassis. The switch fabric uses a cell-switched, buffered three-stage Benes switch fabric architecture.

Is fabric interconnect active or passive? ›

Fabric interconnects are typically deployed in active–active redundant pairs providing uniform access to storage arrays and other network resources.

What is fabric card in networking? ›

In a multi-chassis system you have a set of "linecard chassis" that all interconnect through a different set of fabric cards to the "fabric chassis". Essentially, the fabric chassis allows you to build an even larger system than you could with a single chassis of 8 linecards.

How do you power cycle the fabric interconnect? ›

Startup and shutdown of Fabric Interconnects
  1. Log in to Fabric Interconnect using SSH.
  2. Issue the following two commands: FI # connect local-mgmt FI # reboot.

What are the L1 and L2 ports on Cisco UCS fabric interconnects meant for? ›

The L1 & L2 links are dedicated physical ports (GbE) on UCS Fabric Interconnect platform, responsible of carrying the heartbeat traffic for the UCSM cluster. To be clear, both links are crucial to the survival of the cluster!

What are fabric extenders? ›

Fabric Extender

As the name implies, the FEX "extends" the fabric (ie, the network) out towards the edge devices that require network connectivity.

How do you join fabric without a seam? ›

There are two great ways to attach fabric without sewing: fabric glue or a fusible bonding tape like Dritz Stitch Witchery. If you have a sewing machine, sewing is often still the fastest and most reliable method for many projects, but fabric glue or Stitch Witchery are great alternatives.

How do you attach one piece of fabric to another? ›

Fusible tape is available in a variety of widths and weights. The tape melts when heated by an iron, causing a glue-like action between two pieces of fabric. Fusible tape is the perfect answer to a quick hem, to make a small repair, or hold fabric in place.

Can a fabric extender be used as a switch? ›

In fact, a FEX is not a switch, in that a FEX cannot switch traffic locally or be managed independently. A FEX functions only when connected to a Cisco Nexus 5K or 7K series. All traffic flowing into a FEX will be sent down to the parent 5K or 7K for forwarding, even if the destination is on the originating FEX.

What are the three different types of switch installations? ›

Here are some of the most common types of network switches, with more info on each below: KVM Switch. Managed Switch. Unmanaged Switch.

What is a fabric switch used for? ›

The networking switch fabric is the basic topology of how a network is laid out and connected to switch traffic on a data or circuit-switched network.

What is the default password for Cisco Fabric Interconnect? ›

Cisco recommends changing the password once access is gained using the default “Cisco1234” password.

What type of port on the fabric interconnects is responsible for connecting to the data center? ›

At the fabric interconnect, the server-facing Ethernet port receives the Ethernet and Fibre Channel traffic.

What are the different modes of Cisco UCS? ›

UCS Fabric Interconnect supports two types of switching modes: end-host mode (EHM) and the standard Ethernet switching mode. The default switching mode is the EHM, which eliminates the use of the Spanning Tree Protocol (STP) on Fabric Interconnect.

What are three types of switching fabrics? ›

There are three types of switching fabrics: memory, bus, the crossbar. Switching viamemory is what the first generation routers use.

What is a fabric switch port? ›

Fabric ports, which are on a switch and provide connections between a node and the network. E_Ports. Expansion ports, which are on a switch and connect to other switches, sometimes by means of inter-switch links (ISLs).

What are different network fabrics? ›

There are two major types of Ethernet network fabrics, the shortest path bridging (SPB) and the transparent Interconnection of lots of links (TRILL). The other kind of modern network fabric is an IP fabric, which uses border gateway protocol (BGP) and Ethernet virtual private networks (EVPNs).

What is a fabric Cisco? ›

Cisco Unified Fabric is the interconnection point for. applications, stored data, and users that can help you: • Build an intelligent, high-performing infrastructure. with multidimensional scalability for the data center. network.

Is UCS manager free? ›

If you are a Cisco UCS customer, of course the answer is yes, since it is free to get started with! Cisco Intersight brings exceptional value to your environment if you are using multiple forms of UCS, such as HyperFlex, B-Series blades Managed by UCS Manager and C-Series rack servers managed by CIMC.

How many fabric interconnects form a High Availability cluster? ›

High-availability configuration requires three IP addresses. Both Fabric Interconnects require an IP address each, and the third IP address is the cluster IP for the management that floats between...

What is the difference between fabric card and line card? ›

Line cards are horizontal and fabric modules are vertical, so line cards and fabric modules have an orthogonal orientation in the chassis, with each fabric module connected to all line cards, and all line cards connected to all fabric modules.

What is a fabric database? ›

A data fabric is an architecture and set of data services that provide consistent capabilities across a choice of endpoints spanning hybrid multicloud environments. It is a powerful architecture that standardizes data management practices and practicalities across cloud, on premises, and edge devices.

How do I restart UCS manager? ›

Resetting a Blade Server
  1. In the Navigation pane, click the Equipment tab.
  2. On the Equipment tab, expand Equipment > Chassis > Chassis Number > Servers.
  3. Choose the server that you want to reset.
  4. In the Work pane, click the General tab.
  5. In the Actions area, click Reset.
  6. In the Reset Server dialog box, do the following:

What is L1 and L2 port? ›

"The L1, L2 links are for Fabric Interconnect(FI) in UCS which is similar architecture like Nexus 5k but they are not active on Nexus 5000/5500"

What is L2 and L3 interface? ›

I answered them, Layer 2 VLAN is a single broadcast domain. It works on layer 2 (Datalink Layer). They can communicate only within it. And L3 VLAN is an Interface, that works on Network Layer. In order to do inter VLAN routing/ communication we need L3 interface (SVI).

What is Layer 2 port? ›

Layer 2 is equivalent to the link layer (the lowest layer) in the TCP/IP network model. Layer2 is the network layer used to transfer data between adjacent network nodes in a wide area network or between nodes on the same local area network.

What are the three types of fabric structures? ›

Fabric structure basics
  • Membrane materials.
  • Cotton canvas.
  • Polyesters.
  • Vinyl-laminated polyesters.
  • Vinyl-coated polyester.
  • Fiberglass.
  • Olefin / polyolefin.
  • PVDF woven.

What is difference between VSS and VPC? ›

With VSS you eliminate the use of VRRP, HSRP, etc.. with VPC you still have to use one HSRP or VRRP. The big functional difference, VSS behaves as one logical device (although it avoids moving traffic ti/from its peer) while VPC operates as two logical devices except for the VPC port-channel.

How do you use a fabric paint extender? ›


Add to Fabric Paint and stir until desired effect is acheived. As a rough guide start with a ratio of 1:1 and continue to add extender until desired consistency and effect is acheived. Test on a sample swatch to ensure compatibility. Apply to garment or fabric.

Is fabric glue permanent? ›

Formulated to bond fabric, and hard-to-hold embellishments, Gorilla Fabric Glue provides a fast setting, permanent bond that remains flexible after washing. This high strength adhesive dries crystal clear and can be used on a variety of surfaces, making it the perfect alternative to a traditional needle and thread.

What are the 3 types of seams? ›

In clothing construction, seams are classified by their type (plain, lapped, bound, flat) and position in the finished garment (centre back seam, inseam, side seam).

What stitch is best for appliqué? ›

When it comes to machine appliqué, we quilters have some all-time favorite stitches, such as satin stitch, straight stitch, blanket stitch, and a small zigzag stitch. Different stitches can help give a basic quilt block a new look.

Can you glue two fabrics together? ›

Bonding is the technique of adhering two fabrics together, which can create fabrics with reversible or two-side characters. The bonding process can be either an adhesive glue application between the two fabrics or placing a double-sided fusible web between two fabrics.

What is the best stitch to use for machine appliqué? ›

The two most popular machine appliqué stitches are the Zigzag stitch (also known as the Satin stitch) and the Buttonhole or Blanket stitch. For hand appliqué, Buttonhole stitch and Appliqué stitch are most common.

What is Cisco network fabric? ›

Cisco Unified Fabric is the interconnection point for. applications, stored data, and users that can help you: • Build an intelligent, high-performing infrastructure. with multidimensional scalability for the data center. network.

What does a Cisco fabric extender do? ›

The Cisco Nexus B22 Fabric Extender behaves like a remote line card for a parent Cisco Nexus switch, together forming a distributed modular system.

What is a Cisco fabric module? ›

A fabric module connects the linecards and the supervisors together in a Nexus. So if you had a server connected to a module say in slot 3 using card N7K-F248XP-25 and it was connecting to another card in slot 4 of your 7k switch the fabric module would switch the traffic between these cards in the Nexus.

What is the difference between network and fabric? ›

A fabric refers collectively to the equipment and configuration that implements a network. A network fabric describes the network topology in which components pass data to each other through interconnecting switches.

What does switching fabric do in a router? ›

The switching fabric connects the router's input ports to its output ports. This switching fabric is completely contained with the router - a network inside of a network router!

Can fabric extender be used as a switch? ›

In fact, a FEX is not a switch, in that a FEX cannot switch traffic locally or be managed independently. A FEX functions only when connected to a Cisco Nexus 5K or 7K series. All traffic flowing into a FEX will be sent down to the parent 5K or 7K for forwarding, even if the destination is on the originating FEX.

What is a fabric extender module? ›

The Cisco ® Fabric Extender architecture provides a highly scalable, unified server-access platform across a range of 100 Megabit Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, unified fabric, copper and fiber connectivity, rack and blade server, single OS, and virtual embedded bridge environments and directly ...

What is extender switch? ›

It expands the distance of network transmission by resending or forwarding data signals. PoE extender is used to extend the length of the LAN segment. It is the simplest and most economical interconnected device used to extend the network distance in a local area network environment.

What is Cisco fabric Services protocol? ›

Cisco Fabric Services (CFS) provides a common infrastructure for automatic configuration synchronization in the network. It provides the transport function and a set of common services to the features.

What is a fabric edge node? ›

Fabric Edge Nodes – A Fabric device (e.g. Access or Distribution) that connects Wired. Endpoints to the SDA Fabric. ▪ Identity Services – External ID System(s) (e.g. ISE) are leveraged for dynamic Endpoint.

What is the purpose of an SD access fabric control plane node? ›

The fabric console plane node is a LISP map server/resolver (MS/MR) with enhanced functions for software defined access including fabric wireless and scalable group tag mapping. It maintains a simple host tracking database to map endpoint identifiers to routing locators.

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