Options for CoS/QoS in Today’s Packet LANs

• RSVP
  • RSVP only works with Layer 3 devices
  • Layer 2 Switching is displacing Routing in the LAN
  • RSVP will be available in Winsock 2.0 (Windows ‘98)
  • Applications must be rewritten to support RSVP

• IEEE-802.1p
  • Provides CoS at Layer 2
  • Layer 2 Switching is the majority of LAN implementations
  • IEEE-802.1p switches are shipping from multiple vendors today
  • Layer 2 ASICs allow traffic prioritization at line speed

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