GFP-T usage in FC-BB-2

1
GFP-T usage in FC-BB-2
Confidential Property of Akara Corporation
2
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
• X43 scrambling on remainder
• NOT FC frame-based
• Exception for idle insertion/removal
• Client Management frames

3

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