1-8To do... Use the command... RemarksDefine an ACL rule rule [ rule-id ] { permit | deny }rule-stringRequiredFor information aboutrule-string, refer to ACLCommands.Assign a description string tothe ACL rule rule rule-id comment text OptionalNo description by defaultAssign a description string tothe ACL description text OptionalNo description by defaultNote that:z You can modify any existent rule of the Layer2 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, the number of the rule willbe the greatest rule number plus one. If the current greatest rule number is 65534, however, thesystem will display an error message and you need to specify a number for the rule.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[Sysname] acl number 4000[Sysname-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.[Sysname-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-ffffConfiguring User-defined ACLA user-defined ACL filters packets by comparing specific bytes in packet headers with specified string.A user-defined ACL can be numbered from 5000 to 5999.Configuration prerequisitesTo configure a time range-based user-defined ACL rule, you need to define the corresponding timeranges first. For information about time range configuration, refer to Configuring Time Range.Configuration procedureFollow these steps to define a user-defined ACL rule:
