Routing

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