GFP-T usage in FC-BB-2
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Transcript of GFP-T usage in FC-BB-2
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