DPtech FW1000 SERIES, Руководство по настройке пользователя

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DPtech FW1000 Series Firewall Products User Configuration Guide
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4.17 Advanced QoS
Advanced QoS consists of the traffic marking, congestion management, congestion avoidance, and traffic shaping
function. It executes Weighted Round Robin (WRR), Deficit Round Robin (DRR) scheduling method for IP packets
and implements Weighted Random Early Detection (WRED), traffic policy and traffic shaping for IP packets.
4.17.1 Traffic classification
Traffic classification is used for doing QoS action for data packets.
Priority mapping table: the device provides multiple priority mapping tables, which represents different priority
mapping relationship respectively. Under normal condition, the device looks up default priority mapping for data
packets. If default priority mapping table cannot satisfied with users, user can modify mapping table according to
their requirement.
To enter the traffic classification page, you can choose Basic> Firewall > QOS> Traffic classification , as shown
in Figure4-45.
Figure4-45 Traffic classification
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describes the details of traffic classification.
Table4-20 Traffic classification
Item Description
COS CoS is a 3-bits field in a packet header. It specifies a priority value between 0 and 7, more
commonly known as CS0 through CS7, which is used by quality of service (QoS).
EXP EXP is a 3-bits field in MPLS packet header. It specifies a priority value between 0 and 7. By
default, the priority EXP and IPv4 can match with each other.