Allied Telesis AT-S63 - Manual (Page 150)

Chapter 13: Access Control Lists
150 Section II: Advanced Operations
Guidelines
Here are the rules to creating ACLs:
 Ports can have multiple permit and deny ACLs.
 ACLs must have at least one classifier.
 ACLs can have up to sixteen classifiers.
 ACLs can be assigned to more than one switch port.
 ACLs filter ingress traffic, but not egress traffic.
 The action of an 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.
 The order in which the ACLs are added to a port is not important
because the packets are compared against all of a port’s ACLs.
 ACLs that have the same classifiers cannot be assigned to the same
port because classifiers cannot be assigned more than once to a port.
This is also true for ACLs and Quality of Service policies that have the
same classifiers.
 The switch can store up to 64 ACLs.