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TechSAT GmbH reserves the right to make changes
without further notice.
© Copyright 2008 TechSAT GmbH • All rights reserved.
Trademark Notice
Product and other trademark names referred to within this
manual are the property of their respective trademark holders.
AFDX® is a registered trademark of Airbus Deutschland.
AFDX® / ARINC 664 Tutorial 􀁠 3/30
Contents
Scope......................................................................................... 7
Overview.................................................................................... 9
Aircraft Data Network (ADN) Characteristics .............................................. 9
Emerging of AFDX.......................................................................................... 9
AFDX Characteristics................................................................................... 10
AFDX Network Architecture................................................... 11
Physical Topology........................................................................................ 12
Logical Topology.......................................................................................... 13
AFDX Communication Concept............................................. 15
The Virtual Link (VL)..................................................................................... 15
Virtual Link Scheduling ................................................................................... 15
Sub Virtual Links............................................................................................. 16
AFDX Port Types .......................................................................................... 17
AFDX Communication Ports........................................................................... 17
Receive Sampling Ports ........................................................................................17
Transmit Sampling Ports........................................................................................17
Receive Queuing Ports................................................................................... 17
Transmit Queuing Ports.........................................................................................17
Service Access Ports (SAP) ........................................................................... 18
Frame Fragmentation................................................................................... 18
AFDX Network Protocol ......................................................... 19
AFDX Protocol Stack.................................................................................... 19
AFDX Frame Structure ................................................................................. 20
Ethernet Preamble.......................................................................................... 20
Ethernet Protocol ............................................................................................ 20
Ethernet Payload ............................................................................................ 20
Ethernet Error Control .................................................................................... 20
Ethernet Postamble ........................................................................................ 21
Network Reliability.................................................................. 23
Integrity Checking (IC) ................................................................................. 23
4/30 􀁟 700008_TUT-AFDX-EN_1000
SN Usage in Transmitting Mode..................................................................... 24
SN Usage in Receiving Mode......................................................................... 24
Redundancy Management (RM).................................................................. 24
The AFDX Switch .................................................................... 25
Frame Filtering.............................................................................................. 26
Traffic Policing.............................................................................................. 26
AFDX Network Configuration ................................................ 27
Transmit Scheduling .................................................................................... 27
Transmit Scheduling Example........................................................................ 27
Bandwidth Allocation................................................................................... 29
List of Figures • Tables • Formulas
AFDX® / ARINC 664 Tutorial 􀁠 5/30
List of Figures
Figure 1: AFDX network architecture ............................................................. 11
　
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