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End-to end lossless Ethernet in Ethernet fabric

  • US 9,736,085 B2
  • Filed: 08/29/2012
  • Issued: 08/15/2017
  • Est. Priority Date: 08/29/2011
  • Status: Active Grant
First Claim
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1. A switch, comprising:

  • one or more ports;

    a memory;

    packet processing circuitry configured to identify a priority value in a first inner layer-2 header of a packet encapsulated with a first outer encapsulation header, wherein the priority value indicates a class of service associated with priority-based flow control for the packet, and wherein the first outer encapsulation header comprises a first switch identifier identifying the switch and a second switch identifier identifying a second switch in a routed network; and

    flow control circuitry configured to, in response to detecting a potential buffer overflow for the class of service, generate a pause frame comprising a second inner layer-2 header for the class of service associated with the priority-based flow control, wherein the second inner layer-2 header is encapsulated with a second outer encapsulation header comprising the second switch identifier as a destination identifier, and wherein the first and second outer encapsulation headers are based on a same encapsulation protocol.

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