Allied Telesis AT-S63 - Manual (Page 124)

Chapter 11: Access Control Lists
124 Section II: Advanced Operations
Guidelines
Here are the rules to creating ACLs:
ˆ A port can have multiple permit and deny ACLs.
ˆ An ACL must have at least one classifier.
ˆ An ACL can be assigned to more than one switch port.
ˆ An ACL filters ingress traffic, but not egress traffic.
ˆ The action of a ACL can be either permit or deny. A permit ACL
overrides a deny ACL on the same port when the ACLs define the
same traffic.
ˆ The order in which the ACLs are added to a port is not important since
the packets are compared against all of a port’s ACLs.
ˆ Since classifiers cannot be assigned more than once to a port, ACLs
that have the same classifier cannot be assigned to the same port.
ˆ An ACL and a Quality of Service policy cannot be assigned to the
same port if they have a common classifier.
ˆ The switch can store up to 64 ACLs.