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Key Considerations for Designing a Layer 3 with Resiliency (Routed

VLT) Fabric

Use the Layer 3 with Resiliency (Routed VLT) fabric to extend equal cost multi-pathing capabilities. When designing a

Layer 3 with Resiliency (Routed VLT) fabric, consider the following:

• You can deploy up to 10 fabrics. However, the fabrics do not communicate with each other.

• AFM manages Dell Networking S4810, S4820T, S6000, and Z9000 switches.

CAUTION: If you are already using a deployed switch, you must reset the factory settings. The switch must be in

BMP mode.

For more information on BMP, see DHCP Integration and the

FTOS Configuration Guide

for the Dell Networking S4810,

S4820T, S6000, and Z9000 switches at https://www.force10networks.com/CSPortal20/KnowledgeBase/

Documentation.aspx.

The number and type of switches in a Layer 3 with Resiliency (Routed VLT) fabric are based on the following:

• The number of current uplinks (minimum of 2) and downlinks for the access switches.

• The number of planned edge ports (future uplinks and downlinks) for the access switches.

• Whether the access switches need to act as a ToR or access.

• Fabric interlink bandwidth (the links between the aggregation and access switches).

• Downlinks which can be 1Gb, 10Gb, or 40 Gb.

• The fabric interlink bandwidth, 10 Gb or 40 Gb, is fixed and based on the fabric type.

CAUTION: If you do not specify additional links in the fabric design for future expansion in the Bandwidth and Port

Count screen you can only expand the downlinks on the existing fabric.

For information on how to expand a fabric, see Editing and Expanding an Existing Fabric Design. For information about

tiers, see Deployment Topology See also Deployment Topology Use Cases.

Gathering Useful Information for a Layer 3 with Resiliency (Routed

VLT) Fabric

To gather useful information for a Layer 3 with Resiliency (Routed VLT) fabric before you begin:

• Obtain the CSV file that contains the system MAC addresses, service tag and serial numbers for each switch

provided from Dell manufacturing or manually enter this information.

• Obtain the location of the switches, including the rack and row number from your network administrator or network

operator.

• Obtain the remote Trivial File Transfer Protocol (TFTP) / File Transfer Protocol (FTP) address from your network

administrator or network operator. To specify a TFTP/FTP site, go to Administration > Settings >TFTP/FTP screen. For

information about which software packages to use, see the Release Notes.

• Download the software image for each type of switch in the fabric. Each type of switch must use the same version of

the software image within the fabric. Place the software images on the TFTP/FTP site so that the switches can

install the appropriate FTOS software image and configuration file.

• Obtain the Dynamic Host Configuration Protocol (DHCP) server address to use for the fabric from your DHCP

network administrator or network operator. If a remote DHCP server is not available, AFM also provides a local

DHCP. The DHCP server must be in the same subnet where the switches are located. After you power cycle the

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Dell Active Fabric Manager Guía de usuario Pagina 20