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S12700 V200R010C00 Configuration Guide - QoS

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, ACL-based simplified traffic policy, and HQoS.
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What Is the Relationship Between an ACL and a Traffic Policy?

What Is the Relationship Between an ACL and a Traffic Policy?

An ACL is often used with a traffic policy. A traffic policy defines the traffic classifier matching an ACL and a traffic behavior such as permit/deny associated with the traffic classifier.

The permit/deny actions in an ACL and a traffic behavior in the traffic policy are used as follows.

ACL

Traffic Behavior in the Traffic Policy

Final Action Taken for Matching Packets

permit

permit

permit

permit

deny

deny

deny

permit

deny

deny

deny

deny

A switch permits packets by default. To reject packets between subnets, define the packets to be rejected in the ACL. If the rule permit command is used, all packets match the rule. If the traffic behavior defines the deny action, all packets are filtered, causing service interruption.

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Updated: 2019-08-21

Document ID: EDOC1000142089

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