Tp-Link tl-sg105e — настройка QoS: Портовая и 802.1P Конфигурация [38/43]

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Easy Smart Configuration Utility

User Guide

1. Port Based

When port-base QoS mode is enabled, the user can manually map the ingress packets of the port

to four different priority queues. After that, the switch will preferentially send packets in the queue

with higher priority, and only when the queue with higher priority is empty, packets in the queue

with lower priority are sent.

2. 802.1P Based

Figure 7-2 802.1Q Frame

As shown in the figure above, each 802.1Q Tag has a Pri field, comprising 3 bits. The 3-bit priority

field is 802.1p priority in the range of 0 to 7. The 802.1p priority value determines how the switch

maps the ingress packets to the priority queues. The mapping relationship between eight 802.1p

priority value and priority queues is shown as follows:

Figure 7-3 Map 802.1P Priority

z Priority 0 and 1 are assigned to the 1 (Lowest) priority queue.

z Priority 2 and 3 are assigned to the 2 (Normal) priority queue.

z Priority 4 and 5 are assigned to the 3 (Medium) priority queue.

z Priority 6 and 7 are assigned to the 4 (Highest) priority queue.

When 802.1P QoS mode is enabled, the switch will automatically map the ingress packets to

priority queues based on the 802.1p priority and the above mapping relationship. After that,

packets in all the queues are sent in order based on the weight value for each queue. The weight

value ratio of TC0, TC1, TC2 and TC3 is 1:2:4:8. As for the untagged packets, the switch will

forward it according to the default port-based QoS mode.

The QoS module is mainly for priority configuration and traffic control, including three submenus:

QoS Basic, Bandwidth Control and Storm Control.