Definition

data center bridging (DCB)

This definition is part of our Essential Guide: Enterprise IT infrastructure in the age of cloud: A guide for CIOs
Contributor(s): Todd Erickson

Data center bridging (DCB) is an enhancement to existing 802.1 bridge specifications standards that involves four technological enhancements. DCB is in development by the IEEE 802.1 Data Center Bridging Task Group. The group’s objective is to create a converged data-center network infrastructure using Ethernet as the unified fabric.

Currently, data centers typically have multiple application-specific networks that run on separate link-layer technologies, such as Fibre Channel (FC) for storage and Ethernet for connecting to a local-area network (LAN). The goal is to enhance Ethernet so it becomes a lossless transport that allows 802.1 bridges to to deploy a single converged network for all data-center applications.

The benefits of a converged data center network include:

  • Simpler management with only one fabric to deploy, maintain and upgrade. 
  • Fewer failure points where networks connect.
  • Lower costs because fewer adapters, cables and switches and less power are required to enable communication among disparate networks.

The four specifications from the DCB Task Group are:

Priority-based Flow Control (PFC). Provides a link-level, flow-control mechanism that can be independently controlled for each priority to ensure zero-loss due to converged-network congestion.

Congestion Notification (CN). Provides end-to-end congestion management for protocols without built-in congestion-control mechanisms. It’s also expected to benefit protocols with existing congestion management by providing more timely reactions to network congestion.

Enhanced Transmission Selection (ETS). Provides a common management framework for bandwidth assignment to traffic classes.

Data Center Bridging Exchange Protocol (DCBx). A discovery and capability exchange protocol used to convey capabilities and configurations of the other three DCB features between neighbors to ensure consistent configuration across the network.

This was first published in December 2011

Continue Reading About data center bridging (DCB)

PRO+

Content

Find more PRO+ content and other member only offers, here.

0 comments

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchSolidStateStorage

  • Tintri VMstore T5000

    Like all of its VM-aware storage systems, Tintri’s first all-flash array -- the Tintri VMstore T5000 -- allows admins to bypass ...

  • SolidFire SF9605

    The high-capacity SolidFire SF9605 uses SolidFire’s Element OS 8 (Oxygen) to deliver new enterprise features such as synchronous ...

  • HPE 3PAR StoreServ 20850

    HPE 3PAR StoreServ 20850 holds 1,024 solid-state drives (SSDs). Hewlett Packard Enterprise claims it can deliver more than three ...

SearchVirtualStorage

SearchCloudStorage

SearchDisasterRecovery

SearchDataBackup

  • Asigra Cloud Backup Version 13

    Asigra Cloud Backup Version 13 provides an AWS Elastic Block Store Snapshot Manager and the ability to support Docker container ...

  • Veeam Availability Suite v8

    Veeam Availability Suite v8 offers several key backup software components in one package, including Veeam Cloud Connect, Snapshot...

  • Druva inSync 5.5

    Druva inSync 5.5 endpoint backup software stands out with its proactive compliance, cloud app integration, full text search and ...

Close