Answer
The following are the major QoS properties and their features:
Queuing at the VLAN level, per Packet Forwarding Engine using I-chip
- 4,000 schedulers with four queues
- 2,000 schedulers with eight queues
Hierarchical QoS
- Traffic shaping at the physical port and at the customer VLAN or set of VLANs with the same service VLAN.
- The traffic-control-profiles configuration statement is extended to support QoS at the interface-set level.
- Support for priority propagation.
- Shape traffic at the physical port and the customer VLAN and set of customer VLANs with the same service VLAN.
- More customer VLAN schedulers than previous solutions: 2,000 eight-queue schedulers or 4,000 four-queue schedulers per 10 Gigabit Ethernet, versus 1,000 any-queue schedulers per 10 Gigabit Ethernet for IQ2.
- Three levels of priority versus only two levels with IQ and IQ2.
- Priority propagation—Priority from the queue level is preserved/demoted when passing logical interface or interface set stages.
- Shaping and scheduling at inner/outer VLAN tag levels using a logical interface or interface set.
Queues and forwarding classes
- Eight queues per port
- 16 forwarding classes
- Four scheduling priorities per queue
- Four WRED profiles per queue with flexible RED profiles
For more information, see MX Series Interface Module Reference