# 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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