1-8Note that:z You can modify any existent rule of the Layer 2 ACL and the unmodified part of the ACL remains.z If you do not specify the rule-id argument when creating an ACL rule, the rule will be numberedautomatically. If the ACL has no rules, the rule is numbered 0; otherwise, it is the maximum rulenumber plus one.z The content of a modified or created rule cannot be identical with the content of any existing rules;otherwise the rule modification or creation will fail, and the system prompts that the rule alreadyexists.Configuration Example# Configure ACL 4000 to deny packets sourced from the MAC address 000d-88f5-97ed, destined forthe MAC address 0011-4301-991e, and with their 802.1p priority being 3. system-view[device] acl number 4000[device-acl-ethernetframe-4000] rule deny cos 3 source 000d-88f5-97ed ffff-ffff-ffff dest0011-4301-991e ffff-ffff-ffff# Display the configuration information of ACL 4000.[device-acl-ethernetframe-4000] display acl 4000Ethernet frame ACL 4000, 1 ruleAcl's step is 1rule 0 deny cos excellent-effort source 000d-88f5-97ed ffff-ffff-ffff dest 0011-4301-991effff-ffff-ffffACL AssignmentOn a device, you can assign ACLs to the hardware for packet filtering.As for ACL assignment, the following four ways are available.z Assigning ACLs globally, for filtering the inbound packets on all the ports.z Assigning ACLs to a VLAN, for filtering the inbound packets on all the ports and belonging to aVLAN.z Assigning ACLs to a port group, for filtering the inbound packets on all the ports in a port group. Forinformation about port group, refer to Basic Port Operation.z Assigning ACLs to a port, for filtering the inbound packets on a port.You can assign ACLs in the above-mentioned ways as required.
