QoS and Linux Kernel

• Configurable both as end host as well as router (ATM, intserv, diffserv, IEEE802.1p, etc)

• default: 3 level strict priority expedited forwarding based on RFC 1349 TOS field

  • Apps can do marking (diffserv Marking included)

• Various attempts made in introducing rate differentiation

  • Alan Cox's shaper device
  • Apache - mod_throttle

• Non-shared media: Multi routing tables, etc