QoS Routing Dependencies
Impact on forwarding path
- Larger number of entries affects complexity, but
- Efficient general purpose classifiers are being developed
- Layer “2” tunnels, e.g., MPLS (or ATM) can simplify forwarding decisions
Signalling requirements
- Need some mechanism to
- Express resource requirements
- Install forwarding state in routers
- Overhead increases with number of “flows”
- Lightweight signalling work
- RSVP setup ? 1msec on 33MHz 68040 processor!