H3C S5120-EI Series Configuration manual

H3C S5120-EI Series Ethernet Switches

ACL and QoS

Configuration Guide

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Document Version: 6W102-20100722

Product Version: Release 2202

No part of this manual may be reproduced or transmitted in any form or by any means without prior

written consent of Hangzhou H3C Technologies Co., Ltd.

Trademarks

H3C, , Aolynk, , H

3

Care,

, TOP G, , IRF, NetPilot, Neocean, NeoVTL,

SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V

2

G, V

n

G, PSPT,

XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co.,

Ltd.

All other trademarks that may be mentioned in this manual are the property of their respective owners.

Notice

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface

The H3C S5120-EI documentation set includes 10 configuration guides, which describe the software

features for the S5120-EI Series Ethernet Switches and guide you through the software configuration

procedures. These configuration guides also provide configuration examples to help you apply software

features to different network scenarios.

The ACL and QoS Configuration Guide describes fundamentals and configuration of ACL and QoS. It

describes how to create IPv4 ACL and IPv6 ACL, use ACL for packet filtering, use QoS polices to

control traffic, and configure common QoS techniques such as traffic policing, traffic shaping, and

congestion management.

This preface includes:

z Audience

z Document Organization

z Conventions

z About the H3C S5120-EI Documentation Set

z Obtaining Documentation

z Documentation Feedback

Audience

This documentation set is intended for:

z Network planners

z Field technical support and servicing engineers

z Network administrators working with the S5120-EI series

Document Organization

The ACL and QoS Configuration Guide comprises these parts:

ACL Configuration QoS Overview

QoS Configuration

Approaches

Priority Mapping

Configuration

Traffic Policing, Traffic

Shaping, and Line Rate

Configuration

Congestion Management

Configuration

Traffic Filtering

Configuration

Priority Marking

Configuration

Traffic Redirecting

Configuration

Class-Based Accounting

Configuration

Appendix A Default

Priority Mapping Tables

Appendix B Introduction

to Packet Precedences

Conventions

This section describes the conventions used in this documentation set.

Command conventions

Convention Description

Boldface Bold text represents commands and keywords that you enter literally as shown.

italic

Italic text represents arguments that you replace with actual values.

Convention Description

[ ]

Square brackets enclose syntax choices (keywords or arguments) that are

optional.

{ x | y | ... }

Braces enclose a set of required syntax choices separated by vertical bars,

from which you select one.

[ x | y | ... ]

Square brackets enclose a set of optional syntax choices separated by vertical

bars, from which you select one or none.

{ x | y | ... } *

Asterisk marked braces enclose a set of required syntax choices separated by

vertical bars, from which you select at least one.

[ x | y | ... ] *

Asterisk marked square brackets enclose optional syntax choices separated by

vertical bars, from which you may select multiple choices or none.

&<1-n>

The argument or keyword and argument combination before the ampersand (&)

sign can be entered 1 to n times.

# A line that starts with a pound (#) sign is comments.

GUI conventions

Convention Description

Boldface

Window names, button names, field names, and menu items are in Boldface.

For example, the New User window appears; click OK.

>

Multi-level menus are separated by angle brackets. For example, File > Create

> Folder.

Symbols

Convention Description

Means reader be careful. Improper operation may cause data loss or damage to

equipment.

Means a complementary description.

About the H3C S5120-EI Documentation Set

The H3C S5120-EI documentation set also includes:

Category Documents Purposes

Marketing brochures Describe product specifications and benefits.

Technology white papers

Provide an in-depth description of software features

and technologies.

RPS User Manual

Describes the appearances, features, and

specifications of the RPS units available for the

products.

RPS Ordering Information for

H3C Low-End Ethernet Switches

Provides the RPS and switch compatibility matrix and

RPS cable specifications.

Product

description and

specifications

H3C Low End Series Ethernet

Switches Pluggable Modules

Manual

Describes the models, appearances, and

specifications of the pluggable modules available for

the products.

Category Documents Purposes

Interface Card User Manual

Describes the appearance and specifications of the

interface card.

S5120-EI Series Ethernet

Switches Installation Manual

Provides a complete guide to hardware installation

and hardware specifications.

Provides regulatory information and the safety

instructions that must be followed during installation.

Pluggable SFP[SFP+][XFP]

Transceiver Modules Installation

Guide

Guides you through installing SFP/SFP+/XFP

transceiver modules.

Hardware

installation

Interface Card User Manual Describes how to install the interface card.

Configuration guides

Describe software features and configuration

procedures.

Software

configuration

Command references Provide a quick reference to all available commands.

H3C Series Ethernet Switches

Login Password Recovery

Manual

Tells how to find the lost password or recover the

password when the login password is lost.

Operations and

maintenance

Release notes

Provide information about the product release,

including the version history, hardware and software

compatibility matrix, version upgrade information,

technical support information, and software

upgrading.

Obtaining Documentation

You can access the most up-to-date H3C product documentation on the World Wide Web at

http://www.h3c.com.

Click the links on the top navigation bar to obtain different categories of product documentation:

[Technical Support & Documents > Technical Documents] – Provides hardware installation, software

upgrading, and software feature configuration and maintenance documentation.

[Products & Solutions] – Provides information about products and technologies, as well as solutions.

[Technical Support & Documents > Software Download] – Provides the documentation released with

the software version.

Documentation Feedback

You can e-mail your comments about product documentation to [email protected].

We appreciate your comments.

i

Table of Contents

1 ACL Configuration·····································································································································1-1

ACL Overview·········································································································································1-1

Introduction to ACL··························································································································1-1

Application of ACLs on the Switch ··································································································1-2

ACL Classification ···························································································································1-2

ACL Numbering and Naming ··········································································································1-3

Match Order·····································································································································1-3

ACL Rule Numbering Step··············································································································1-4

Implementing Time-Based ACL Rules····························································································1-5

IPv4 Fragments Filtering with ACLs································································································1-5

ACL Configuration Task List ···················································································································1-5

Configuring an ACL·································································································································1-6

Creating a Time Range ···················································································································1-6

Configuring a Basic ACL ·················································································································1-6

Configuring an Advanced ACL········································································································1-9

Configuring an Ethernet Frame Header ACL················································································1-12

Copying an ACL ····························································································································1-13

Applying an ACL for Packet Filtering·····························································································1-14

Displaying and Maintaining ACLs·········································································································1-15

ACL Configuration Examples················································································································1-16

IPv4 ACL Application Configuration Example···············································································1-16

IPv6 ACL Application Configuration Example···············································································1-17

2 QoS Overview ············································································································································2-1

Introduction to QoS·································································································································2-1

Introduction to QoS Service Models ·······································································································2-1

Best-Effort Service Model················································································································2-1

IntServ Service Model ·····················································································································2-1

DiffServ Service Model····················································································································2-2

QoS Techniques Overview·····················································································································2-2

Positions of the QoS Techniques in a Network···············································································2-2

3 QoS Configuration Approaches···············································································································3-1

QoS Configuration Approach Overview··································································································3-1

Non Policy-Based Configuration ·····································································································3-1

Policy-Based Configuration·············································································································3-1

Configuring a QoS Policy························································································································3-1

Defining a Class ······························································································································3-2

Defining a Traffic Behavior··············································································································3-4

Defining a Policy······························································································································3-5

Applying the QoS Policy··················································································································3-5

Displaying and Maintaining QoS Policies························································································3-8

ii

4 Priority Mapping Configuration················································································································4-1

Priority Mapping Overview······················································································································4-1

Introduction to Priority Mapping·······································································································4-1

Priority Mapping Tables···················································································································4-1

Priority Trust Mode on a Port ··········································································································4-2

Priority Mapping Procedure·············································································································4-2

Priority Mapping Configuration Tasks·····································································································4-3

Configuring Priority Mapping···················································································································4-4

Configuring a Priority Mapping Table······························································································4-4

Configuring the Priority Trust Mode on a Port·················································································4-4

Configuring the Port Priority of a Port······························································································4-5

Displaying and Maintaining Priority Mapping··························································································4-6

Priority Mapping Configuration Examples·······························································································4-6

Priority Mapping Table and Priority Marking Configuration Example··············································4-6

5 Traffic Policing, Traffic Shaping, and Line Rate Configuration····························································5-1

Traffic Policing and Line Rate Overview·································································································5-1

Traffic Evaluation and Token Buckets·····························································································5-1

Traffic Policing·································································································································5-2

Traffic Shaping ································································································································5-3

Line Rate·········································································································································5-4

Configuring Traffic Policing·····················································································································5-4

Configuration Procedure··················································································································5-4

Configuration Example····················································································································5-5

Configuring GTS ·····································································································································5-6

Configuration Procedure··················································································································5-6

Configuration Example····················································································································5-6

Configuring the Line Rate·······················································································································5-6

Configuration Procedure··················································································································5-6

Configuration Example····················································································································5-7

Displaying and Maintaining Traffic Policing, GTS, and Line Rate ··························································5-7

6 Congestion Management Configuration·································································································6-1

Congestion Management Overview········································································································6-1

Causes, Impacts, and Countermeasures of Congestion·································································6-1

Congestion Management Policies···································································································6-2

Congestion Management Configuration Approaches·············································································6-4

Configuring Congestion Management····································································································6-5

Configuring SP Queuing··················································································································6-5

Configure WRR Queuing·················································································································6-6

Configuring WFQ Queuing··············································································································6-7

Configuring SP+WRR Queues········································································································6-8

Configuration Example····················································································································6-8

Displaying and Maintaining Congestion Management············································································6-9

7 Traffic Filtering Configuration··················································································································7-1

Traffic Filtering Overview ························································································································7-1

Configuring Traffic Filtering·····················································································································7-1

iii

Traffic Filtering Configuration Example···································································································7-2

Traffic Filtering Configuration Example···························································································7-2

8 Priority Marking Configuration·················································································································8-1

Priority Marking Overview·······················································································································8-1

Configuring Priority Marking····················································································································8-1

Priority Marking Configuration Example··································································································8-2

Priority Marking Configuration Example··························································································8-2

9 Traffic Redirecting Configuration············································································································9-1

Traffic Redirecting Overview···················································································································9-1

Traffic Redirecting ···························································································································9-1

Configuring Traffic Redirecting ···············································································································9-1

10 Class-Based Accounting Configuration······························································································10-1

Class-Based Accounting Overview·······································································································10-1

Configuring Class-Based Accounting ···································································································10-1

Displaying and Maintaining Traffic Accounting·····················································································10-2

Class-Based Accounting Configuration Example·················································································10-2

Class-Based Accounting Configuration Example··········································································10-2

11 Appendix A Default Priority Mapping Tables ·····················································································11-1

12 Appendix B Introduction to Packet Precedences··············································································12-1

IP Precedence and DSCP Values ········································································································12-1

802.1p Priority·······································································································································12-2

13 Index ·······················································································································································13-1

1-1

1 ACL Configuration

This chapter includes these sections:

z ACL Overview

z ACL Configuration Task List

z Configuring an ACL

z Creating a Time Range

z Configuring a Basic ACL

z Configuring an Advanced ACL

z Configuring an Ethernet Frame Header ACL

z Copying an ACL

z Displaying and Maintaining ACLs

z ACL Configuration Examples

Unless otherwise stated, ACLs refer to both IPv4 and IPv6 ACLs throughout this document.

ACL Overview

This section covers these topics:

z Introduction to ACL

z Application of ACLs on the Switch

z ACL Classification

z ACL Numbering and Naming

z Match Order

z Implementing Time-Based ACL Rules

z IPv4 Fragments Filtering with ACLs

Introduction to ACL

As network scale and network traffic are increasingly growing, network security and bandwidth

allocation become more and more critical to network management. Packet filtering can be used to

efficiently prevent illegal users from accessing networks and to control network traffic and save

network resources. Access control lists (ACL) are often used to filter packets with configured matching

rules.

1-2

ACLs are sets of rules (or sets of permit or deny statements) that decide what packets can pass and

what should be rejected based on matching criteria such as source MAC address, destination MAC

address, source IP address, destination IP address, and port number.

Application of ACLs on the Switch

The switch supports two ACL application modes:

z Hardware-based application: An ACL is assigned to a piece of hardware. For example, an ACL

can be referenced by QoS for traffic classification. Note that when an ACL is referenced to

implement QoS, the actions defined in the ACL rules, deny or permit, do not take effect; actions to

be taken on packets matching the ACL depend on the traffic behavior definition in QoS. For details

about traffic behavior, see QoS Configuration Approaches in the ACL and QoS Configuration

Guide.

z Software-based application: An ACL is referenced by a piece of upper layer software. For

example, an ACL can be referenced to configure login user control behavior, thus controlling

Telnet, SNMP and Web users. Note that when an ACL is reference by the upper layer software,

actions to be taken on packets matching the ACL depend on those defined by the ACL rules. For

details about login user control, see User Login Control in the Fundamentals Configuration Guide.

z When an ACL is assigned to a piece of hardware and referenced by a QoS policy for traffic

classification, the switch does not take action according to the traffic behavior definition on a

packet that does not match the ACL.

z When an ACL is referenced by a piece of software to control Telnet, SNMP, and Web login users,

the switch denies all packets that do not match the ACL.

z For details of ACL application for packet filtering, see Applying an ACL for Packet Filtering.

ACL Classification

ACLs fall into three categories, as shown in Table 1-1.

Table 1-1 ACL categories

Category ACL number IP version Match criteria

IPv4 Source IPv4 address

Basic ACLs 2000 to 2999

IPv6 Source IPv6 address

Advanced ACLs 3000 to 3999

IPv4

Source/destination IPv4 address, protocols over

IPv4, and other Layer 3 and Layer 4 header

fields

1-3

Category ACL number IP version Match criteria

IPv6

Source/destination IPv6 address, protocols over

IPv6, and other Layer 3 and Layer 4 header

fields

Ethernet frame

header ACLs

4000 to 4999 IPv4 and IPv6

Layer 2 header fields, such as source and

destination MAC addresses, 802.1p priority,

and link layer protocol type

ACL Numbering and Naming

Each ACL category has a unique range of ACL numbers. When creating an ACL, you must assign it a

number for identification, and in addition, you can also assign the ACL a name for the ease of

identification. After creating an ACL with a name, you can neither rename it nor delete its name.

For an Ethernet frame header ACL, the ACL number and name must be globally unique. For an IPv4

basic or advanced ACLs, its ACL number and name must be unique among all IPv4 ACLs, and for an

IPv6 basic or advanced ACL, among all IPv6 ACLs. You can assign an IPv4 ACL and an IPv6 ACL the

same number and name.

Match Order

The rules in an ACL are sorted in a certain order. When a packet matches a rule, the device stops the

match process and performs the action defined in the rule. If an ACL contains overlapping or

conflicting rules, the matching result and action to take depend on the rule order.

Two ACL match orders are available:

z config: Sorts ACL rules in ascending order of rule ID. A rule with a lower ID is matched before a

rule with a higher ID. If you use this approach, check the rules and their order carefully.

z auto: Sorts ACL rules in depth-first order, as described in Table 1-2. The depth-first order varies

with ACL categories.

Table 1-2 Sorting ACL rules in depth-first order

ACL category Depth-first rule sorting procedures

IPv4 basic ACL

1) A rule with more 0s in the source IP address wildcard mask takes precedence.

More 0s means a narrower IP address range.

2) A rule with a smaller ID takes precedence.

IPv4 advanced ACL

1) A rule configured with a specific protocol is prior to a rule with the protocol type set

to IP. IP represents any protocol over IP.

2) A rule with more 0s in the source IP address wildcard mask takes precedence.

More 0s means a narrower IP address range.

3) A rule with more 0s in the destination IP address wildcard mask takes

precedence.

4) A rule with a narrower TCP/UDP service port number range takes precedence.

5) A rule with a smaller ID takes precedence.

1-4

ACL category Depth-first rule sorting procedures

IPv6 basic ACL

1) A rule configured with a longer prefix for the source IP address takes precedence.

A longer prefix means a narrower IP address range.

2) A rule with a smaller ID takes precedence.

IPv6 advanced ACL

1) A rule configured with a specific protocol is prior to a rule with the protocol type set

to IP. IP represents any protocol over IPv6.

2) A rule configured with a longer prefix for the source IPv6 address has a higher

priority.

3) A rule configured with a longer prefix for the destination IPv6 address takes

precedence.

4) A rule with a narrower TCP/UDP service port number range takes precedence.

5) A rule with a smaller ID takes precedence.

Ethernet frame

header ACL

1) A rule with more 1s in the source MAC address mask takes precedence. More 1s

means a smaller MAC address.

2) A rule with more 1s in the destination MAC address mask takes precedence.

3) A rule with a smaller ID takes precedence.

A wildcard mask, also called an inverse mask, is a 32-bit binary and represented in dotted decimal

notation. In contrast to a network mask, the 0 bits in a wildcard mask represent ‘do care’ bits, while the

1 bits represent 'don’t care bits'. If the 'do care' bits in an IP address identical to the 'do care' bits in an

IP address criterion, the IP address matches the criterion. All 'don’t care' bits are ignored. The 0s and

1s in a wildcard mask can be noncontiguous. For example, 0.255.0.255 is a valid wildcard mask. With

wildcard masks, you can create more granular match criteria than network masks.

ACL Rule Numbering Step

What is the ACL rule numbering step

If you do not assign an ID for the rule you are creating, the system automatically assigns it a rule ID.

The rule numbering step sets the increment by which the system numbers rules automatically. For

example, the default ACL rule numbering step is 5. If you do 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 re-numbering

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.

1-5

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 will be numbered 15. If the ACL does not contain any rule, the first rule

will be 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.

Likewise, after you restore the default step, ACL rules are renumbered in the default step. Assume that

there are four ACL rules numbered 0, 2, 4, and 6 in steps of 2. When the default step is restored, the

rules are renumbered 0, 5, 15, and 15.

Implementing Time-Based ACL Rules

You can implement ACL rules based on the time of day by applying a time range to them. A time-based

ACL rule takes effect only in any time periods specified by the time range.

Two basic types of time range are available:

z Periodic time range, which recurs periodically on a day or days of the week.

z Absolute time range, which represents only a period of time and does not recur.

You may apply a time range to ACL rules before or after you create it. However, the rules using the

time range can take effect only after you define the time range.

IPv4 Fragments Filtering with ACLs

Traditional packet filtering matched only first fragments of IPv4 packets, and allowed all subsequent

non-first fragments to pass through. This mechanism resulted in security risks, because attackers may

fabricate non-first fragments to attack networks.

As for the configuration of a rule of an IPv4 ACL, the fragment keyword specifies that the rule applies

to non-first fragment packets only, and does not apply to non-fragment packets or the first fragment

packets. ACL rules that do not contain this keyword is applicable to both non-fragment packets and

fragment packets.

ACL Configuration Task List

IPv4 configuration task list

Complete the following tasks to configure an IPv4 ACL:

Task Remarks

Creating a Time Range Optional

Configuring an IPv4 basic ACL

Configuring an IPv4 advanced ACL

Configuring an Ethernet Frame Header ACL

Required

Configure at least one task

Copying an IPv4 ACL Optional

Applying an IPv4 ACL for Packet Filtering Optional

1-6

IPv6 ACL configuration task list

Complete the following tasks to configure an IPv6 ACL:

Task Remarks

Creating a Time Range Optional

Configuring an IPv6 basic ACL

Configuring an IPv6 Advanced ACL

Configuring an Ethernet Frame Header ACL

Required

Configure at least one task

Copying an IPv6 ACL Optional

Applying an IPv6 ACL for Packet Filtering Optional

Configuring an ACL

Creating a Time Range

Follow these steps to create a time range:

To do… Use the command… Remarks

Enter system view

system-view

––

Create a time range

time-range

time-range-name

{ start-time

to

end-time days

[

from

time1 date1 ] [

to

time2

date2 ] |

from

time1 date1 [

to

time2 date2 ] |

to

time2 date2 }

Required

By default, no time range exists.

You may create time ranges identified with the same name. They are regarded as one time range

whose active period is the result of ORing periodic ones, ORing absolute ones, and ANDing periodic

and absolute ones.

You may create a maximum of 256 uniquely named time ranges, each with 32 periodic time ranges at

most and 12 absolute time ranges at most.

Configuring a Basic ACL

Configuring an IPv4 basic ACL

IPv4 basic ACLs match packets based on only source IP address.

Follow these steps to configure an IPv4 basic ACL:

To do… Use the command… Remarks

Enter system view

system-view

––

1-7

To do… Use the command… Remarks

Create an IPv4 basic ACL and

enter its view

acl number

acl-number [

name

acl-name ] [

match-order

{

auto

|

config

} ]

Required

By default, no ACL exists.

IPv4 basic ACLs are numbered in

the range 2000 to 2999.

You can use the

acl

name

acl-name command to enter the

view of an existing named IPv4

ACL.

Configure a description for the

IPv4 basic ACL

description

text

Optional

By default, an IPv4 basic ACL has

no ACL description.

Set the rule numbering step

step

step-value

Optional

5 by default.

Create or edit a rule

rule

[ rule-id ] {

deny

|

permit

}

[

fragment

|

logging

|

source

{ sour-addr sour-wildcard |

any

} |

time-range

time-range-name ] *

Required

By default, an IPv4 basic ACL

does not contain any rule.

To create or edit multiple rules,

repeat this step.

Note that the

logging

keyword is

not supported if the ACL is to be

referenced by a QoS policy for

traffic classification.

Configure or edit a rule description

rule

rule-id

comment

text

Optional

By default, an IPv4 ACL rule has

no rule description.

Note that:

z You can only modify the existing rules of an ACL that uses the match order of config. When

modifying a rule of such an ACL, you may choose to change just some of the settings, in which

case the other settings remain the same.

z You cannot create a rule with, or modify a rule to have, the same permit/deny statement as an

existing rule in the ACL.

z When the ACL match order is auto, a newly created rule will be inserted among the existing rules

in the depth-first match order. Note that the IDs of the rules still remain the same.

1-8

You can modify the match order of an ACL with the acl number acl-number [ name acl-name ]

match-order { auto | config } command but only when it does not contain any rules.

Configuring an IPv6 basic ACL

Follow these steps to configure an IPv6 basic ACL:

To do… Use the command… Remarks

Enter system view

system-view

––

Create an IPv6 basic ACL view

and enter its view

acl ipv6 number

acl6-number

[

name

acl6-name ] [

match-order

{

auto

|

config

} ]

Required

By default, no ACL exists.

IPv6 basic ACLs are numbered in

the range 2000 to 2999.

You can use the

acl

ipv6

name

acl6-name command to enter the

view of an existing named IPv6

ACL.

Configure a description for the

IPv6 basic ACL

description

text

Optional

By default, an IPv6 basic ACL has

no ACL description.

Set the rule numbering step

step

step-value

Optional

5 by default

Create or edit a rule

rule

[ rule-id ] {

deny

|

permit

}

[

fragment

|

logging

|

source

{ ipv6-address prefix-length |

ipv6-address/prefix-length

| any

} |

time-range

time-range-name ]*

Required

By default, an IPv6 basic ACL

does not contain any rule.

To create or edit multiple rules,

repeat this step.

Note that the

logging

and

fragment

keywords are not

supported if the ACL is to be

referenced by a QoS policy for

traffic classification.

Configure or edit a rule description

rule

rule-id

comment

text

Optional

By default, an IPv6 basic ACL rule

has no rule description.

Note that:

1-9

z You can only modify the existing rules of an ACL that uses the match order of config. When

modifying a rule of such an ACL, you may choose to change just some of the settings, in which

case the other settings remain the same.

z You cannot create a rule with, or modify a rule to have, the same permit/deny statement as an

existing rule in the ACL.

z When the ACL match order is auto, a newly created rule will be inserted among the existing rules

in the depth-first match order. Note that the IDs of the rules still remain the same.

You can modify the match order of an IPv6 ACL with the acl ipv6 number acl6-number [ name

acl6-name ] match-order { auto | config } command but only when it does not contain any rules.

Configuring an Advanced ACL

Configuring an IPv4 advanced ACL

IPv4 advanced ACLs match packets based on source and destination IP addresses, protocols over IP,

and other protocol header information, such as TCP/UDP source and destination port numbers, TCP

flags, ICMP message types, and ICMP message codes.

IPv4 advanced ACLs also allow you to filter packets based on three priority criteria: type of service

(ToS), IP precedence, and differentiated services codepoint (DSCP) priority.

Compared with IPv4 basic ACLs, IPv4 advanced ACLs allow of more flexible and accurate filtering.

Follow these steps to configure an IPv4 advanced ACL:

To do… Use the command… Remarks

Enter system view

system-view

––

Create an IPv4 advanced ACL and

enter its view

acl number

acl-number [

name

acl-name ] [

match-order

{

auto

|

config

} ]

Required

By default, no ACL exists.

IPv4 advanced ACLs are

numbered in the range 3000 to

3999.

You can use the

acl

name

acl-name command to enter the

view of an existing named IPv4

ACL.

Configure a description for the

IPv4 advanced ACL

description

text

Optional

By default, an IPv4 advanced ACL

has no ACL description.

Set the rule numbering step

step

step-value

Optional

5 by default.

1-10

To do… Use the command… Remarks

Create or edit a rule

rule

[ rule-id ] {

deny

|

permit

}

protocol [ {

established

| {

ack

ack-value |

fin

fin-value |

psh

psh-value |

rst

rst-value |

syn

syn-value |

urg

urg-value } * } |

destination

{ dest-addr

dest-wildcard |

any

} |

destination-port

operator port1

[ port2 ] |

dscp

|

fragment

|

icmp-type

{ icmp-type icmp-code |

icmp-message } |

logging

|

precedence

precedence |

reflective

|

source

{ sour-addr

sour-wildcard |

any

} |

source-port

operator port1 [ port2 ] |

time-range

time-range-name |

tos

tos ] *

Required

By default, an IPv4 advanced ACL

does not contain any rule.

To create or edit multiple rules,

repeat this step.

Notes that the

reflective

keyword

is not supported.

Note that if the ACL is to be

referenced by a QoS policy for

traffic classification, the

logging

keyword is not supported and the

operator argument cannot be

neq

.

Configure or edit a rule description

rule

rule-id

comment

text

Optional

By default, an IPv4 ACL rule has

no rule description.

Note that:

z You can only modify the existing rules of an ACL that uses the match order of config. When

modifying a rule of such an ACL, you may choose to change just some of the settings, in which

case the other settings remain the same.

z You cannot create a rule with, or modify a rule to have, the same permit/deny statement as an

existing rule in the ACL.

z When the ACL match order is auto, a newly created rule will be inserted among the existing rules

in the depth-first match order. Note that the IDs of the rules still remain the same.

You can modify the match order of an ACL with the acl number acl-number [ name acl-name ]

match-order { auto | config } command but only when it does not contain any rules.

Configuring an IPv6 Advanced ACL

IPv6 advanced ACLs match packets based on the source IPv6 address, destination IPv6 address,

protocol carried over IPv6, and other protocol header fields such as the TCP/UDP source port number,

TCP/UDP destination port number, ICMP message type, and ICMP message code.

Compared with IPv6 basic ACLs, they allow of more flexible and accurate filtering.

1-11

Follow these steps to configure an IPv6 advanced ACL:

To do… Use the command… Remarks

Enter system view

system-view

––

Create an IPv6 advanced ACL

and enter its view

acl ipv6

number

acl6-number [

name

acl6-name ] [

match-order

{

auto

|

config

} ]

Required

By default, no ACL exists.

IPv6 advanced ACLs are

numbered in the range 3000 to

3999.

You can use the

acl

ipv6

name

acl6-name command to enter

the view of an existing named

IPv6 ACL.

Configure a description for the

IPv6 advanced ACL

description

text

Optional

By default, an IPv6 advanced

ACL has no ACL description.

Set the rule numbering step

step

step-value

Optional

5 by default.

Create or edit a rule

rule

[ rule-id ] {

deny

|

permit

} protocol

[ {

established

| {

ack

ack-value |

fin

fin-value |

psh

psh-value |

rst

rst-value |

syn

syn-value |

urg

urg-value } * } |

destination

{ dest dest-prefix |

dest/dest-prefix |

any

} |

destination-port

operator port1 [ port2 ]

|

dscp

dscp |

fragment

|

icmpv6-type

{ icmpv6-type icmpv6-code |

icmpv6-message } |

logging

|

source

{ source source-prefix |

source/source-prefix

| any

} |

source-port

operator port1 [ port2 ] |

time-range

time-range-name ] *

Required

By default IPv6 advanced ACL

does not contain any rule.

To create or edit multiple rules,

repeat this step.

Note that if the ACL is to be

referenced by a QoS policy for

traffic classification, the

logging

and

fragment

keywords are not

supported and the operator

argument cannot be

neq

.

Configure or edit a rule

description

rule

rule-id

comment

text

Optional

By default, an IPv6 ACL rule has

no rule description.

1-12

Note that:

z You can only modify the existing rules of an ACL that uses the match order of config. When

modifying a rule of such an ACL, you may choose to change just some of the settings, in which

case the other settings remain the same.

z You cannot create a rule with, or modify a rule to have, the same permit/deny statement as an

existing rule in the ACL.

z When the ACL match order is auto, a newly created rule will be inserted among the existing rules

in the depth-first match order. Note that the IDs of the rules still remain the same.

You can modify the match order of an IPv6 ACL with the acl ipv6 number acl6-number [ name

acl6-name ] match-order { auto | config } command but only when it does not contain any rules.

Configuring an Ethernet Frame Header ACL

Ethernet frame header ACLs, also called Layer 2 ACLs, match packets based on Layer 2 protocol

header fields such as source MAC address, destination MAC address, 802.1p priority (VLAN priority),

and link layer protocol type.

Follow these steps to configure an Ethernet frame header ACL:

To do… Use the command… Remarks

Enter system view

system-view ––

Create an Ethernet frame header

ACL and enter its view

acl number

acl-number [

name

acl-name ] [

match-order

{

auto

|

config

} ]

Required

By default, no ACL exists.

Ethernet frame header ACLs are

numbered in the range 4000 to

4999.

You can use the

acl

name

acl-name command to enter the

view of an existing named

Ethernet frame header ACL.

Configure a description for the

Ethernet frame header ACL

description

text

Optional

By default, an Ethernet frame

header ACL has no ACL

description.

Set the rule numbering step

step

step-value

Optional

5 by default.

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H3C S5120-EI Series Configuration manual

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