undo rule (Layer 2 ACL view)

Function

The undo rule command deletes an ACL rule in the Layer ACL view.

By default, no Layer 2 ACL rule is created and no description is configured for an ACL rule.

Format

undo rule rule-id description

undo rule rule-id { time-range | type | source-mac | destination-mac | 8021p | cvlan-8021p } ^*

Parameters

Parameter	Description	Value
rule-id	Specifies the ID of an ACL rule.	The value is an integer ranging from 0 to 4294967294.
time-range	Specifies a time range during which an ACL rule takes effect.	-
type	Matches packets based on a Layer 2 protocol type.	-
source-mac	Specifies a source MAC address.	-
destination-mac	Specifies a destination MAC address.	-
description	Specify rule description.	-
8021p	Specifies the 802.1p priority in an inner VLAN tag.	-
cvlan-8021p	Specifies the 802.1p priority in an inner VLAN tag.	-

Views

Layer 2 ACL view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
acl	write

Usage Guidelines

Usage Scenario

Run the rule description command to configure a description for an ACL in any of the following situations:

A large number of ACLs are configured, and their functions are difficult to identify.
An ACL is used at a long interval, and its function may be left forgotten.
To delete the description of an ACL rule, run the undo rule description command.

Prerequisites

An ACL rule has been created using the rule command.

Precautions

If the description of an ACL rule is not configured, the ACL rule may be misunderstood or misused.

Example

# Configure a description for a Layer 2 ACL rule numbered 23, and then delete the description of the ACL rule.

<HUAWEI> system-view
[~HUAWEI] acl number 4999
[*HUAWEI-acl-L2-4999] rule 23 permit destination-mac 0-0-1 source-mac 0-0-2 type 0x0800
[*HUAWEI-acl-L2-4999] rule 23 description This rule is used to filter packets according to the MAC address and protocol type.
[*HUAWEI-acl-L2-4999] undo rule 23 description