Tp-Link T2500-28TC V2 [202/342] 802 p cos mapping

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11.1.3 802.1P/CoS Mapping

On this page you can configure the mapping relation between the 802.1P priority tag-id/CoS-id

and the TC-id.

802.1P gives the Pri field in 802.1Q tag a recommended definition. This field, ranging from 0-7, is

used to divide packets into 8 priorities. 802.1P Priority is enabled by default, so the packets with

802.1Q tag are mapped to different priority levels based on 802.1P priority mode but the

untagged packets are mapped based on port priority mode. With the same value, the 802.1P

priority tag and the CoS will be mapped to the same TC.

Choose the menu QoS→DiffServ→802.1P/CoS Mapping to load the following page.

Figure 11-8 802.1P Priority

The following entries are displayed on this screen:



802.1P Priority Config

802.1P Priority:

Enable/Disable 802.1P Priority.



Priority and CoS-mapping Config

Tag-id/Cos-id:

Indicates the precedence level defined by IEEE802.1P and the

CoS ID.

Queue TC-id: Indicates the priority level of egress queu

e the packets with tag

and CoS-

id are mapped to. The priority levels of egress queue

are labeled as TC0, TC1, TC2 and TC3.

By default, the mapping

relation between tag/cos and the egress queue is: 0-TC1

1-TC0, 2-TC0, 3-TC1, 4-TC2, 5-TC2, 6-TC3, 7-TC3.

Note:

To complete QoS function configuration, you have to go to the Schedule Mode page to select

a schedule mode after the configuration is finished on this page.

Configuration Procedure: