Mapping CoS/802.1p to a Queue

Use the CoS/802.1p to Queue page to map 802.1p priorities to egress queues. The CoS/802.1p to Queue table determines the egress queues of the incoming packets based on the 802.1p priority in their VLAN tags. For incoming untagged packets, the 802.1p priority will be the default CoS/802.1p priority assigned to the ingress ports.

802.1p Values
(0 to 7, 7 being the highest)

Queue
(8 queues, 8 being the highest priority)

Notes

0

2

Background

1

1

Best Effort

2

3

Excellent Effort

3

4

Critical Application LVS phone SIP

4

5

Video

5

6

Voice Cisco IP phone default

6

7

Interwork Control LVS phone RTP

7

8

Network Control

By changing the CoS/802.1p to Queue mapping, the queue schedule method, and bandwidth allocation, it is possible to achieve the desired QoS in a network.

The CoS/802.1p to Queue mapping is applicable only if one of the following exists:

To map CoS values to egress queues:

  1. Click Quality of Service > General > CoS/802.1p to Queue.
  2. Enter the following information:
    • 802.1p—Displays the 802.1p priority tag values to be assigned to an egress queue, where 0 is the lowest and 7 is the highest priority.
    • Output Queue—Select the egress queue to which the 802.1p priority is mapped. Eight egress queues are supported, where Queue 8 is the highest priority egress queue and Queue 1 is the lowest priority egress queue.

    For each 802.1p priority, select the Output Queue to which it is mapped.

  3. Click Apply. 802.1p priority values to queues are mapped, and the Running Configuration is updated.
  4. Click Restore Defaults to restore the CoS/802.1p to Queue mappings to factory defaults.