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Fibre Channel over Ethernet (FCoE) is a computer network technology that encapsulates Fibre Channel frames over Ethernet networks. This allows Fibre Channel to use 10 Gigabit Ethernet networks (or higher speeds) while preserving the Fibre Channel protocol. The specification was part of the International Committee for Information Technology Standards T11 FC-BB-5 standard published in 2009.[1]

Combined storage and local area network

Functionality[edit]

FCoE transports Fibre Channel directly over Ethernet while being independent of the Ethernet forwarding scheme. The FCoE protocol specification replaces the FC0 and FC1 layers of the Fibre Channel stack with Ethernet. By retaining the native Fibre Channel constructs, FCoE was meant to integrate with existing Fibre Channel networks and management software.

In October 2007, the first public end-to-end FCoE demo occurred at Storage Network World including adapters from QLogic, switches from Nuova Systems, and storage from NetApp (none of the companies involved made any product announcements at the time).

  1. This release provides updated network controller firmware for the QLogic BCM57xx and BCM57xxx devices. This release should be used with the QLogic family version 19.0 device drivers. Fixes & Enhancements. Fixes: - VMs unable to communicate when on separate hosts in a Win 2008 R2 HyperV Cluster using SLB Team.
  2. QLogic Fibre Channel (FC) offers best-in-class performance and functionality for storage area networks. Designed for rapid server deployment and orchestration, they deliver maximum flexibility with concurrent FCP and FC-NVMe.
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Data centers used Ethernet for TCP/IP networks and Fibre Channel for storage area networks (SANs). With FCoE, Fibre Channel becomes another network protocol running on Ethernet, alongside traditional Internet Protocol (IP) traffic. FCoE operates directly above Ethernet in the network protocol stack, in contrast to iSCSI which runs on top of TCP and IP. As a consequence, FCoE is not routable at the IP layer, and will not work across routed IP networks.

Since classical Ethernet had no priority-based flow control, unlike Fibre Channel, FCoE required enhancements to the Ethernet standard to support a priority-based flow control mechanism (to reduce frame loss from congestion). The IEEE standards body added priorities in the data center bridging (dcb) Task Group.

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Fibre Channel required three primary extensions to deliver the capabilities of Fibre Channel over Ethernet networks:

  • Encapsulation of native Fibre Channel frames into Ethernet Frames.
  • Extensions to the Ethernet protocol itself to enable an Ethernet fabric in which frames are not routinely lost during periods of congestion.
  • Mapping between Fibre Channel N_port IDs (aka FCIDs) and Ethernet MAC addresses.
'Converged' network adapter

Computers can connect to FCoE with converged network adapters (CNAs), which contain both Fibre Channel host bus adapter (HBA) and Ethernet network interface controller (NIC) functionality on the same physical card. CNAs have one or more physical Ethernet ports. FCoE encapsulation can be done in software with a conventional Ethernet network interface card, however FCoE CNAs offload (from the CPU) the low level frame processing and SCSI protocol functions traditionally performed by Fibre Channel host bus adapters.

Application[edit]

The main application of FCoE is in data center storage area networks (SANs). FCoE has particular application in data centers due to the cabling reduction it makes possible, as well as in server virtualization applications, which often require many physical I/O connections per server.

With FCoE, network (IP) and storage (SAN) data traffic can be consolidated using a single network. This consolidation can:

  • reduce the number of network interface cards required to connect to disparate storage and IP networks
  • reduce the number of cables and switches
  • reduce power and cooling costs

Frame format[edit]

FCoE Frame Format

FCoE is encapsulated over Ethernet with the use of a dedicated Ethertype, 0x8906. A single 4-bit field (version) satisfies the IEEE sub-type requirements. The 802.1Q tag is optional but may be necessary in a given implementation.[2] The SOF (start of frame) and EOF (end of frame) are encoded as specified in RFC3643. Reserved bits are present to guarantee that the FCoE frame meets the minimum length requirement of Ethernet. Inside the encapsulated Fibre Channel frame, the frame header is retained so as to allow connecting to a storage network by passing on the Fibre Channel frame directly after de-encapsulation.

The FIP (FCoE Initialization Protocol) is an integral part of FCoE. Its main goal is to discover and initialize FCoE capable entities connected to an Ethernet cloud. FIP uses a dedicated Ethertype of 0x8914.

Timeline[edit]

In October 2003, Azul Technology developed early version and applied for a patent.[3]

In April 2007, the FCoE standardization activity started.

For

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In October 2007, the first public end-to-end FCoE demo occurred at Storage Network World including adapters from QLogic, switches from Nuova Systems, and storage from NetApp (none of the companies involved made any product announcements at the time).[4][5]

In April 2008, an early implementor was Nuova Systems, a subsidiary of Cisco Systems, which announced a switch.[6][7]Brocade Communications Systems also announced support in 2008.[8] After the late-2000s financial crisis, however, any new technology had a hard time getting established.[9][10]

In June 2009, the FCoE technology that had been defined as part of the International Committee for Information Technology Standards (INCITS) T11 FC-BB-5 standard was forwarded to ANSI for publication.[1]

In May 2010, the FC-BB-5 standard was published as ANSI/INCITS 462-2010.[11] Some additional work was done in the INCITS.[12]

Data center switches from Force10 and Dell PowerConnect supported FCoE and in June 2013, Dell Networking, which is the new brand-name for all networking portfolio of Dell, introduced the S5000 series which can be a fully native FCoE switch with the option to include a native fibre channel module, allowing you to connect the S5000 directly to an FC SAN environment.[13]

See also[edit]

  • ATA over Ethernet (AoE)
  • SCST Linux FCoE target driver

References[edit]

  1. ^ ab'Fibre Channel: Backbone - 5 revision 2.00'(PDF). American National Standard for Information Technology International Committee for Information Technology Standards Technical Group T11. June 4, 2009. Archived from the original(PDF) on December 29, 2009. Retrieved May 5, 2011.
  2. ^'Fibre Channel – Backbone 5, 7.7 FCoE frame format'(PDF). T11. 4 June 2009. Archived from the original(PDF) on December 29, 2009. Retrieved 2015-01-06.
  3. ^Alex E. Henderson; John William Hayes; Walter E. Croft; Linda Elaine Eaton (October 21, 2003). 'Transporting fibre channel over ethernet'. US Patent and Trademark Office. US Patent 20080028096 granted January 31, 2008
  4. ^Austin Modine (October 17, 2007). 'QLogic hypes ′network consolidation′ with FCoE'. The Register.
  5. ^PrimeNewswire (October 16, 2007). 'QLogic, NetApp and Nuova Systems Demonstrate Industry′s First Converged Network With Fibre Channel Over Ethernet'. TMC News.
  6. ^Paul Shread (April 10, 2008). 'Cisco Buys Nuova as FCoE Heats Up'. Enterprise Storage Forum. Retrieved May 5, 2011.
  7. ^'Cisco Announces Intent to Acquire Remaining Interest in Nuova Systems'. Press release. Cisco Systems. April 8, 2008. Archived from the original on March 4, 2012. Retrieved May 5, 2011.
  8. ^Dave Rowell (March 19, 2008). 'Cisco, Brocade See One Big Happy Fabric'. Enterprise Storage Forum. Retrieved May 5, 2011.
  9. ^Drew Robb (March 29, 2011). 'FCoE Struggles to Gain Traction'. Enterprise Storage Forum. Retrieved May 5, 2011.
  10. ^Henry Newman (April 25, 2011). 'FCoE Gets Lost in Vendor Stupidity'. Enterprise Storage Forum. Retrieved May 5, 2011.
  11. ^'Information technology - Fibre Channel - Backbone - 5 (FC-BB-5)'. ANSI/INCITS 462-2010. International Committee for Information Technology Standards (formerly NCITS). May 13, 2010. Official standard.
  12. ^'Fibre Channel over Ethernet'. T11 web site. Retrieved May 23, 2013.
  13. ^Dell Networking S-Series switches overview, visited 26 May 2013
Qlogic Network & Wireless Cards Driver Download For Windows

External links[edit]

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Fibre_Channel_over_Ethernet&oldid=1003650185'
QLogic Corporation
TypeSubsidiary
IndustryComputer Networking
Founded1992
HeadquartersAliso Viejo, California, USA
Jean Hu (CEO)
ProductsFibre Channel adapters, converged network adapters, Ethernet adapters, iSCSI adapters, and ASICs
Number of employees
1,229 (2013)[1]
ParentMarvell Technology Group
Websitewww.qlogic.com
QLogic SAN-switch with optical FC connectors installed.
Wireless
QLogic QLE2562 dual port 8Gb Fibre Channel host bus adapter card.

QLogic Corporation was an American manufacturer of networking server and storage networking connectivity and application acceleration products, based in Aliso Viejo, California through 2016.[2]QLogic's products include Fibre Channel adapters, converged network adapters for Fibre Channel over Ethernet (FCoE), Ethernetnetwork interface controllers, iSCSI adapters, and application-specific integrated circuits (ASICs).It was a public company from 1992 to 2016.

History[edit]

QLogic was created in 1992 after being spun off by Emulex. QLogic's original business was disk controllers. This business was sold to Marvell Technology Group in 2005. QLogic had its initial public offering in 1994 and was traded on NASDAQ under the symbol QLGC.Originally located in a Costa Mesa, California building adjacent to Emulex, it competed against its parent company in the market for Fibre Channel controllers for storage area networks.[3]

QLogic acquired companies including NetXen.Integrated circuit designer Silicon Design Resources Inc. based in Austin, Texas, was acquired for about $2 million in 1998.[4]In May 2000, QLogic acquired Fibre Channel switch maker Ancor Communications for about $1.7 billion in stock.[5]Little Mountain Group, founded in 1999 and developer of iSCSI technology, was acquired in January 2001 for about $30 million.[6]The compiler company PathScale was acquired for about $109 million in February 2006.[7]Silverstorm Technologies, which designed InfiniBand products, was acquired in October 2006 for about $60 million.[8]After attempting to use PathScale for cluster computing over InfiniBand, the compiler business was sold to SiCortex in August 2006.[9]

QLogic was led by chairman H.K. Desai from 1996, who became executive chairman in 2010 until his death in June 2014.[10]In 2012, the InfiniBand products were sold to Intel for $125 million.[11]Simon Biddiscombe became chief executive in November 2010, until resigning in May 2013 after two years of falling revenue.[12][1]Prasad Rampalli became chief executive a few months later, until August 2015.Jean Hu became acting CEO again at that time.[13]

QLogic announced it was being acquired by Cavium in June 2016, for about $1 billion over its balance sheet cash.[14][15]After the deal closed in August 2016, job cuts were announced.[16]It announced it would move to Irvine, California in 2017.[2]

Cavium was acquired by Marvell Technology Group in 2018.[17]

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Products[edit]

The company makes a range of networking products for storage and converged networks. Storage networking products include Fibre Channel caching adapters, Fibre Channel adapters, iSCSI adapters and Fibre Channel switches. Converged network products include Converged Network Adapters and Intelligent Ethernet Adapters.

Acquisitions[edit]

In 2005, QLogic acquired Troika Networks and storage virtualization products. Later in 2009, it acquired NetXen and Intelligent Ethernet Adapter products. In 2014, QLogic signed a broad technology alliance agreement with Brocade Communications Systems and acquired its fibre channel and converged network adapter business.

References[edit]

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  1. ^ ab'Form 10-K: Annual Report for the Fiscal Year Ending March 31, 2013'. US Securities and Exchange Commission. May 15, 2013. Retrieved February 8, 2017.
  2. ^ abHannah Madans (December 5, 2016). 'QLogic will downsize as it exits Aliso Viejo and moves to Irvine in summer 2017'. The Orange County Register. Retrieved February 8, 2017.
  3. ^Andrew Pollack (July 12, 1999). 'Qlogic Gains Force In Data Transfer'. Chicago Tribune. Retrieved February 8, 2017.
  4. ^Dow Jones (August 21, 1998). 'QLogic Acquires Chip Designer, Marketer'. Los Angeles Times. Retrieved February 8, 2017.
  5. ^'Qlogic Plans To Acquire Ancor In Deal Valued At $1.7 Billion'. Chicago Tribune. May 9, 2000. Retrieved February 8, 2017.
  6. ^Scott Bekker (January 24, 2001). 'QLogic Furthers iSCSI with Acquisition of Little Mountain Group'. Redmond Magazine. Retrieved February 9, 2017.
  7. ^Ashlee Vance (February 18, 2006). 'QLogic has an Infiniband moment with PathScale buy: $109m Opteron/Xeon play'. The Register. Retrieved February 9, 2017.
  8. ^'Qlogic buys Silverstorm Technologies'. The Orange County Register. October 4, 2006. Retrieved February 8, 2017.
  9. ^Marvyn (August 2, 2007). 'PathScale compiler moves to SiCortex'. Inside HPC. Retrieved February 8, 2017.
  10. ^Chris Casacchia (June 9, 2014). 'QLogic's Desai Dies at 68'. Orange County Business Journal. Retrieved February 8, 2017.
  11. ^Whittaker, Zack. 'Intel buys QLogic's InfiniBand assets for $125 million'. ZDNet. Retrieved 2019-02-02.
  12. ^Chris Mellow (May 20, 2013). 'Flailing QLogic's boss gives up CEO, president gigs: That seat on the board? You can have that too...'The Register. Retrieved February 8, 2017.
  13. ^Chris Mellow (August 22, 2015). 'QLogic CEO is out, search for successor underway: Prasad Rampalli joins list of ex-execs 'pursuing other opps''. The Register. Retrieved February 8, 2017.
  14. ^'Acquisitions'. Crunchbase. Retrieved 2019-12-17.
  15. ^Larry Dignan (June 15, 2016). 'Cavium buys QLogic in $1.36 billion data center processor deal'. ZDNet. Retrieved February 8, 2017.
  16. ^Hannah Madans (August 30, 2016). 'QLogic to cut nearly 70 jobs following Cavium acquisition'. The Orange County Register. Retrieved February 8, 2017.
  17. ^Shilov, Anton. 'Marvell Completes Acquisition of Cavium, Gets CPU, Networking & Security Assets'. www.anandtech.com. Retrieved 2019-09-01.

External links[edit]

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Retrieved from 'https://en.wikipedia.org/w/index.php?title=QLogic&oldid=1003973804'