This blog was originally started to better help me understand the technologies in the CCIE R&S blueprint; after completing the R&S track I have decided to transition the blog into a technology blog.
CCIE #29033

This blog will continue to include questions, troubleshooting scenarios, and references to existing and new technologies but will grow to include a variety of different platforms and technologies. Currently I have created over 185 questions/answers in regards to the CCIE R&S track!! Note: answers are in the comment field or within "Read More" section.

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Sunday, October 30, 2011

Data Center Enhanced Ethernet


Data Center Enhanced Ethernet (NGDC - Next Generation Data Centers)


  • Priority Based Flow Control (802.1Qbb) - Supports storage traffic and provides CoS flow control
  • CoS Based BW Management (802.1Qaz) - CoS based enhanced transmission, grouping of classes into "service lanes"
  • Backward Congestion Notification (BCN/QCN - 802.1Qau)- end to end congestion management for L2 network
  • Data Center Bridging Capacity Exchange Protocol (DCBXP - 802.1AB) - Auto-negotiation for enhanced Ethernet capabilities (switch to nic)