3-23. ACL
The MSM-6226 switch access control list (ACL) is probably the most commonly used object in the IOS. It is used for packet filtering but also for selecting types of traffic to be analyzed, forwarded, or influenced in some way.
The ACLs are divided into EtherTypes. IPv4, ARP protocol, MAC and VLAN parameters etc. Here we will just go over the standard and extended access lists for TCP/IP. As you create ACEs for ingress classification, you can assign a policy for each port, the policy number is 1-8, however, each policy can be applied to any port. This makes it very easy to determine what type of ACL policy you will be working with.
Note: The High-ACL List rule: When you set on the switch, it will apply the ACL rules with the top priority. The High-ACL rules will give the top priority against the other access control rules.
The Low-ACL List rule: When you set on the switch, it will apply the ACL rules which are lower than some specific packet filtering rules ( e.g. MAC filtering, IP-MAC-Port Binding).
Function name:
High-ACL List / Low-ACL List
Function description:
The switch ACL function support up to 128 High Access Control List (High- ACL) and 256 Low Access Control List (Low-ACL List), using the shared 128 High ACEs and 256 Low ACEs for ingress classification. You can create an ACE and assign this ACE for each port with <Any> or assign this ACE for a policy or assign this ACE for a port. There are 7 priorities, each port can select one of policy, then decides which of the following actions would take according to the packet’s IPv4, EtherType, ARP Protocol, MAC Parameters and VLAN parameters:
Fig. 3-72
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