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ACL in traffic policy on Huawei device

We have to remember that traffic policy consists of 3 parts:

  • Classifier
  • Behavior
  • Traffic-policy

In brief, to configure a traffic policy:

  • define traffic class
  • define action to be applied to the traffic class
  • associate traffic classifiers and behaviors
  • apply the traffic policy to an interface.

Let’s start from ACL.

We have possibility to configure many rules in an ACL. If the ACL is specified in if-match clause, then a packet is matched against multiple rules. If the packet matches a rule in the ACL, then it stops checking against the next rules.

  • In a case of DENY action in the ACL, the matched packet is denied, regardless of what traffic behavior defines.
  • When PERMIT action is defined in the ACL, then traffic behavior is applied to the matched packet.

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