GFP-T usage in FC-BB-2

Confidential – Property of Akara Corporation

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– 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

Confidential – Property of Akara Corporation

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