Linux tc

TC

• qdisc; queuing discipline: high level object for shaping & scheduling
  • Simplest is FIFO, also default
  • classful: different policy for each class of traffic
    • add an identifier (classic) for qdiscs so they can be targeted by filters
    • example HTB
  • classless; queues
  • leaves of qdisc hierarchies must be classless qdiscs(automatic by kernel)
• qdiscs have a handle, classes class id. format h:cid
• IFB: virtual network device with inverted ingress legresss