Routing
Routing

What are the QoS properties of the DPCE-R and DPCE-Q line cards?

by Juniper Employee on ‎01-27-2016 12:56 PM - edited on ‎09-21-2017 01:56 PM by Administrator Administrator (818 Views)

Question

What are the QoS properties of the DPCE-R and DPCE-Q line cards?

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