FCoE for Linux*-based Intel® Ethernet Server Adapter X520 Family
Processor and platform advancements, together with changes in operating systems and applications, have spurred data centers to quickly adopt 10 Gigabit Ethernet (10 GbE) as the de-facto standard for interconnects. By removing the inherent I/O constraints associated with the Memory Controller Hub (MCH) in the latest generation chipsets (5600 series and later), applications that were not technically feasible a few years ago are now becoming mainstream.
One such application is Fiber Channel over Ethernet (FCoE). FCoE is a standards-based solution that includes standards from both FCIA (T11-FC-BB-5) and IEEE Data Center Bridging. DCB (www.ieee802.org/1/pages/dcbridges.html), and falls under IEEE802.1Q – Virtual Bridged Local Area Networks. It comprises the following three standards.
• 802.1Qbb (Priority Flow Control). This standard enables multiple traffic types, such as Ethernet, FCoE, and IPC, to share a common Ethernet link. This granularity enables the data center administrator to manage these traffic types independently over a shared Ethernet link.
• 802.1Qaz (Bandwidth Management). This standard enables management of the QoS from a network level rather than point-to-point. Administrators can now establish guaranteed bandwidth levels for given traffic types within the DCB cloud.
• 802.1Qau (Congestion Management). This standard enables end-to-end congestion management. Pause frames are no longer limited to point-to-point delivery; they can now be sent to the source of the congestion within the DCB cloud.
• DCBX (also part of IEEE 802.1Qaz). This standard defines how nodes communicate their enhanced Ethernet capabilities to their link partners with the DCB cloud.
Read the full FCoE for Linux*-based Intel® Ethernet Server Adapter X520 Family Tech Brief.