gfp t usage in fc bb 2
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GFP-T usage in FC-BB-2. Confidential – Property of Akara Corporation. GFP Basics. TDM Pipe with 20+ MB/Sec capacity Transport of all transmission words 64B/65B encoding to encapsulate K-characters Clumped in 67B Superblocks (incl CRC-16) Lightweight header over group of Superblocks

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gfp t usage in fc bb 2

GFP-T usage in FC-BB-2

Confidential – Property of Akara Corporation

gfp basics
GFP Basics
  • TDM Pipe with 20+ MB/Sec capacity
  • Transport of all transmission words
    • 64B/65B encoding to encapsulate K-characters
    • Clumped in 67B Superblocks (incl CRC-16)
    • Lightweight header over group of Superblocks
    • Scrambling of payloads
      • XOR with special constant on Core Header
      • X^43 scrambling on remainder
    • NOT FC frame-based
      • Exception for idle insertion/removal
  • Client Management frames
slide3

FC-BB-2 Implementation

  • BB Flow control flows through
    • Managed by connected switches
  • No B_Port
  • Message passing to convey link events
    • LOL, LOS via Client Management Frames
  • Not Operational port state if GFP/SONET failure
    • Messages to inform of reverse-direction or mid-path failures
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