Weighted Fair Queuing history
- Proposed by J. Nagle in 1987
- Independent input queues for different sources
- Queues are served round-robin
- “Fair” on a per packet basis
- Not “fair” on a bandwidth basis due to different packet sizes.
- Bit-by-bit round robin would be bandwidth fair, but is impractical to implement.
- The EQM uses fair queuing when servicing ports within the same class of service.