FAQ-What Is the Function of Interface Priorities

Publication Date:  2015-05-06 Views:  155 Downloads:  0
Issue Description
What Is the Function of Interface Priorities?
Solution

The port priority command sets the interface priorities, that is, specifies the default priorities of incoming packets on the interface. AR series routers send packets to different queues based on the interface priority. By default, the AR interface does not trust packet priorities. Packets enter queues according to the interface priority.

If all packets enter queues according to the interface priority, all packets on an interface enter the same queue. Differentiated services cannot be provided. Using the trust command, you can specify the priority to be mapped for packets, that is, search for a priority mapping to the packet priority in the priority mapping table.

The AR150&160&200 series and AR1200 series send packets to different interface queues based on the mapped 802.1p priorities, and use the queue scheduling to provide services for packets with different priorities.

On AR2200 series,
  • From V200R001C00, the device sends packets to different interface queues based on the mapped 802.1p priorities, and use the queue scheduling to provide services for packets with different priorities.
  • From V200R003C00, the AR2204 sends packets to different interface queues based on the mapped 802.1p priorities, and use the queue scheduling to provide services for packets with different priorities. While the AR2201, AR2202, AR2220 and AR2240 send packets to different interface queues based on the mapped local priorities, and use the queue scheduling to provide services for packets with different priorities.
The AR3200 series send packets to different interface queues based on the mapped local priorities, and use the queue scheduling to provide services for packets with different priorities.

END