1-8
Note 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 numbered
automatically. If the ACL has no rules, the rule is numbered 0; otherwise, it is the maximum rule
number 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 already
exists.
Configuration Example
# Configure ACL 4000 to deny packets sourced from the MAC address 000d-88f5-97ed, destined for
the MAC address 0011-4301-991e, and with their 802.1p priority being 3.
<device> system-view
[device] acl number 4000
[device-acl-ethernetframe-4000] rule deny cos 3 source 000d-88f5-97ed ffff-ffff-ffff dest
0011-4301-991e ffff-ffff-ffff
# Display the configuration information of ACL 4000.
[device-acl-ethernetframe-4000] display acl 4000
Ethernet frame ACL 4000, 1 rule
Acl's step is 1
rule 0 deny cos excellent-effort source 000d-88f5-97ed ffff-ffff-ffff dest 0011-4301-991e
ffff-ffff-ffff
ACL Assignment On 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 a
VLAN.
z Assigning ACLs to a port group, for filtering the inbound packets on all the ports in a port group. For
information 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.