Diffserv and Cisco
A subset of Diffserv functionality has been available in Cisco IOS for some time
LLQ, mDRR, WRED are all Diffserv building blocks
IOS originally used IP Precedence (3 bits)
Full 6-bit DSCP support now becoming available
Modular QoS CLI (MQC) was designed in alignment with the Diffserv architecture
unified interface for network wide policy based QoS configuration within Cisco IOS