IP Precedence to a Queue

The IP Precedence to Queue page maps IP Precedence priorities to egress queues. The IP Precedence to Queue Table determines the egress queues of the incoming packets based on the IP Precedence priority.

The following table describes the default mapping when there are 8 queues:

IP Precedence Values (0-7,7 being the highest)

Queue (8 queues 1-8,8 is the highest priority)

Notes

0

1

Background

1

2

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 IP Precedence to Queue mapping (IP Precedence to Queue) and the Queue schedule method and bandwidth allocation, it’s possible to achieve the desired quality of service in a network.

The IP Precedence to Queue mapping is applicable to IP packets if:

  • The device is in QoS Basic mode and IP Precedence is the trusted mode.

  • The device is in QoS Advanced mode and the packets belongs to flows that are IP Precedence trusted.

To map IP Precedence values to egress queues, follow these steps:

Procedure

Step 1

Click Quality of Service > General > IP Precedence to Queue.

Step 2

Enter the parameters.

  • IP Precedence—Displays the IP Precedence priority 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 IP Precedence priority is mapped.

Step 3

For each IP Precedence priority, select the Output Queue to which it is mapped.

Step 4

Click Apply, Cancel or Restore Defaults. IP Precedence priority values to queues are mapped, and the Running Configuration file is updated, the changes that entered are canceled, or previously defined values are restored.