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dummynet – flexible bandwidth manager and delay emulator

Some terms:

• AQM - Active Queue Management
  • droptail - drop packetss if full
  • CoDel
  • PIE

• pipe - virtual path that emulates a connection with a specified bandwidth, propagation delay, and packet loss pattern.
• Simple pipe internally has attached
  • queue (droptail)
  • scheduler (FIFO)
  • pipe (a link emulator with given badwidth and delay)

• Pipe with CoDel AQM set: