Figure C-3 Uni Header; Figure C-4 Nni Header - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Appendix C ATM: An Overview
Figure C-3
Bit —
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Figure C-4
Bit —
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
UNI Header
8 7 6 5
Flow control
Virtual path identifier
Virtual circuit identifier
Virtual circuit identifier
Header Error Control (HEC)
NNI Header
8 7 6 5
Virtual path identifier
Virtual path identifier
Virtual circuit identifier
Virtual circuit identifier
Header Error Control (HEC)
4 3 2 1
Virtual path identifier
Virtual circuit identifier
Cell
Payload type
loss
priority
4 3 2 1
Virtual circuit identifier
Cell
Payload type
loss
priority
Cisco BPX 8600 Series Installation and Configuration
C-3