Answer
The Gigabit Ethernet MPCs supports the following QoS functionality:
- Port-based queuing
- Per-port shaping
- Eight queues per port
- 100 ms of delay buffer by default per port
- 200 ms of delay buffer configurable per port
- Ability to oversubscribe the delay buffer beyond 200 ms per port
- Queue-level shaping and guaranteed rate
- Separate guaranteed and shaping rates
- Rate limit option to police a queue to act as a Low Latency Queue (LLQ)
- Four WRED profiles per queue
- Multiple queue priority levels
- Strict High, High, Medium, and Low guaranteed priority levels
- Strict High and High are at the same hardware priority level
- Round robin at each guaranteed priority level
- High and Low excess priority levels
- Queues perform WRR at the excess priority levels
- Strict priority scheduling at each excess priority level
- Classification per VLAN
- MPLS EXP
- IPv6, IPv4 ToS
- Inner and outer tag 802.1p (and DEI7)
- MF classifiers per VLAN
- Policers per VLAN
- Single rate, single-rate tricolor marking, two-rate tricolor marking, hierarchical policers
- Class-aware intelligent hierarchical policers
- Physical interface policers
- Rewrites per VLAN
- MPLS EXP, IP DSCP/PREC
- Inner and outer tag 802.1p (and DEI7)
- Ingress DSCP rewrite
For more information, see MX Series MS-MPC and MS-MIC Service Cards Data Sheet