If you’re interested in a really good cheat sheet for QoS, then head on over to PacketLife.net. It will save you from looking dumb when your brain decides to take a holiday.
It containins information on:
- Quality of Service Models
- Layer 2 QoS Markings
- IP QoS Markings
- QoS Flowchart
- QoS Terminology
- Per-Hop Behaviors
- Congestion Avoidance
- IP Type of Service (TOS)
- Precedence Values
- DSCP Values
- Queuing Comparison Chart
- First In First Out (FIFO)
- Priority Queuing (PQ)
- LLQ Configuration Example
- Custom Queuing (CQ)
- Weighted Fair Queuing (WFQ)
- Class-Based WFQ (CBWFQ)
- Low Latency Queuing (LLQ)
- Troubleshooting QoS