Rule comments and rule range remarks, Acl rule numbering, What is the acl rule numbering step – H3C Technologies H3C S12500 Series Switches User Manual

Page 12: Automatic rule numbering and renumbering, Acl configuration task list

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Rule comments and rule range remarks

Add a comment about an ACL rule to make it easy to understand. The rule comment appears below the

rule statement.
In addition, add a rule range remark to indicate the start or end of a range of rules created for the same
purpose.

ACL rule numbering

What is the ACL rule numbering step

If you do not assign an ID to the rule you are creating, the system automatically assigns it a rule ID. The
rule numbering step sets the increment by which the system automatically numbers rules. For example, the

default ACL rule numbering step is 5. If you do not assign IDs to rules you are creating, they are

numbered 0, 5, 10, 15, and so on. The wider the numbering step, the more rules you can insert between

two rules.
By introducing a gap between rules rather than contiguously numbering rules, you have the flexibility of

inserting rules in an ACL. This feature is important for a config order ACL, where ACL rules are matched

in ascending order of rule ID.

Automatic rule numbering and renumbering

The ID automatically assigned to an ACL rule takes the nearest higher multiple of the numbering step to
the current highest rule ID, starting with 0.
For example, if the numbering step is 5 (the default), and there are five ACL rules numbered 0, 5, 9, 10,

and 12, the newly defined rule is numbered 15. If the ACL does not contain any rule, the first rule is

numbered 0.
Whenever the step changes, the rules are renumbered, starting from 0. For example, if there are five rules

numbered 5, 10, 13, 15, and 20, changing the step from 5 to 2 causes the rules to be renumbered 0, 2,

4, 6 and 8.

ACL configuration task list

Task Remarks

Configuring a time range

Optional.
Applicable to IPv4 and IPv6 ACLs.

Configuring the ACL operating mode

Optional.
Applicable to EB and EC2 cards.

Configuring a basic ACL

Required.
Configure at least one task.
Applicable to IPv4 and IPv6.