Quidway V100R006C00 User manual

Quidway S2700 Series Ethernet Switches
V100R006C00
Configuration Guide - IP Service
Issue 01
Date 2011-07-15
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
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The information in this document is subject to change without notice. Every effort has been made in the
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recommendations in this document do not constitute the warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
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Website: http://www.huawei.com
Email: [email protected]
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About This Document
Intended Audience
This document describes the configurations of the IP services of the S2700, including the basic
knowledge and configurations of secondary IP addresses, DNS, IP performance, basic IPv6
functions. By reading this document, you can learn the concepts and configuration procedures
of IP services.
This document is intended for:
lPolicy planning engineers
lInstallation and commissioning engineers
lNM configuration engineers
lTechnical support engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
DANGER
Indicates a hazard with a high level of risk, which if not
avoided, will result in death or serious injury.
WARNING
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
CAUTION
Indicates a potentially hazardous situation, which if not
avoided, could result in equipment damage, data loss,
performance degradation, or unexpected results.
TIP
Indicates a tip that may help you solve a problem or save
time.
NOTE
Provides additional information to emphasize or supplement
important points of the main text.
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Configuration Guide - IP Service About This Document
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Command Conventions
The command conventions that may be found in this document are defined as follows.
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... } Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ] Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }*Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]*Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
&<1-n> The parameter before the & sign can be repeated 1 to n times.
# A line starting with the # sign is comments.
Change History
Updates between document issues are cumulative. Therefore, the latest document issue contains
all changes made in previous issues.
Changes in Issue 01 (2011-07-15)
Initial commercial release.
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Contents
About This Document.....................................................................................................................ii
1 IP Addresses Configuration........................................................................................................1
1.1 Introduction to IP Addresses..............................................................................................................................2
1.2 Features of IP Addresses Supported by the S2700.............................................................................................2
1.3 Configuring IP Addresses for Interfaces............................................................................................................3
1.3.1 Establishing the Configuration Task.........................................................................................................3
1.3.2 Configuring a Primary IP Address for an Interface...................................................................................3
1.3.3 (Optional) Configuring a Secondary IP Address for an Interface.............................................................4
1.3.4 Checking the Configuration.......................................................................................................................4
1.4 Configuration Examples.....................................................................................................................................5
1.4.1 Example for Setting Primary and Secondary IP Addresses......................................................................5
2 ARP Configuration........................................................................................................................8
2.1 Overview of ARP...............................................................................................................................................9
2.2 ARP Features Supported by the S2700..............................................................................................................9
2.3 Configuring Static ARP....................................................................................................................................10
2.3.1 Establishing the Configuration Task.......................................................................................................10
2.3.2 Configuring Common Static ARP Entries...............................................................................................11
2.3.3 Configuring Static ARP Entries in a VLAN...........................................................................................11
2.3.4 Checking the Configuration.....................................................................................................................12
2.4 Optimizing Dynamic ARP................................................................................................................................12
2.4.1 Establishing the Configuration Task.......................................................................................................13
2.4.2 Modify the aging parameters of dynamic ARP.......................................................................................13
2.4.3 Enabling ARP Suppression Function......................................................................................................14
2.4.4 Enabling Layer 2 Topology Detection Function.....................................................................................14
2.4.5 Checking the Configuration.....................................................................................................................14
2.5 Configuring Routed Proxy ARP.......................................................................................................................15
2.5.1 Establishing the Configuration Task.......................................................................................................15
2.5.2 Configure an IP Addresses for the Interface............................................................................................16
2.5.3 Enabling the Routed Proxy ARP Function..............................................................................................16
2.5.4 Checking the Configuration.....................................................................................................................16
2.6 Configuring Proxy ARP Within a VLAN........................................................................................................17
2.6.1 Establishing the Configuration Task.......................................................................................................17
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2.6.2 Configure an IP Addresses for the Interface............................................................................................18
2.6.3 Enabling Proxy ARP Within a VLAN....................................................................................................18
2.6.4 Checking the Configuration.....................................................................................................................18
2.7 Configuring Proxy ARP Between VLANs.......................................................................................................19
2.7.1 Establishing the Configuration Task.......................................................................................................19
2.7.2 Configuring an IP Addresses for the Interface........................................................................................20
2.7.3 Enabling Proxy ARP Between VLANs...................................................................................................20
2.7.4 Checking the Configuration.....................................................................................................................20
2.8 Maintaining ARP..............................................................................................................................................21
2.8.1 Clearing ARP Entries..............................................................................................................................21
2.8.2 Monitoring Network Operation Status of ARP.......................................................................................21
2.8.3 Debugging ARP.......................................................................................................................................22
2.9 Configuration Examples...................................................................................................................................22
2.9.1 Example for Configuring ARP................................................................................................................22
2.9.2 Example for Configuring Routed Proxy ARP.........................................................................................25
2.9.3 Example for Configuring Intra-VLAN Proxy ARP................................................................................27
2.9.4 Example for Configuring Inter-VLAN Proxy ARP................................................................................29
2.9.5 Example for Configuring Layer 2 Topology Detection..........................................................................32
3 IP Performance Configuration..................................................................................................35
3.1 Introduction to IP Performance........................................................................................................................36
3.2 IP Performance Supported by the S2700..........................................................................................................36
3.3 Optimizing IP Performance..............................................................................................................................36
3.3.1 Establishing the Configuration Task.......................................................................................................36
3.3.2 Enabling an Interface to Check the Source IP Addresses of Packets......................................................37
3.3.3 Configuring ICMP Attributes..................................................................................................................38
3.3.4 Setting TCP Parameters...........................................................................................................................38
3.3.5 Checking the Configuration.....................................................................................................................39
3.4 Maintaining IP Performance.............................................................................................................................40
3.4.1 Clearing IP Performance Statistics..........................................................................................................40
3.4.2 Monitoring the Running Status of IP Performance.................................................................................41
3.4.3 Debugging IP Performance.....................................................................................................................41
3.5 Configuration Examples...................................................................................................................................42
3.5.1 Example for Disabling the Sending of ICMP Host Unreachable Packets...............................................42
4 DNS Configuration.....................................................................................................................46
4.1 Introduction to DNS.........................................................................................................................................47
4.2 DNS Supported by the S2700...........................................................................................................................47
4.3 Configuring DNS..............................................................................................................................................47
4.3.1 Establishing the Configuration Task.......................................................................................................47
4.3.2 Configuring Static DNS Entries..............................................................................................................48
4.3.3 Configuring Dynamic DNS.....................................................................................................................48
4.3.4 Checking the Configuration.....................................................................................................................49
4.4 Maintaining DNS..............................................................................................................................................50
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4.4.1 Clearing DNS Entries..............................................................................................................................50
4.4.2 Monitoring Network Operation Status of DNS.......................................................................................51
4.4.3 Debugging DNS......................................................................................................................................51
4.5 Configuration Examples...................................................................................................................................52
4.5.1 Example for Configuring DNS................................................................................................................52
5 Basic Configurations of IPv6.....................................................................................................56
5.1 Introduction to IPv6..........................................................................................................................................57
5.2 IPv6 Features Supported by the S2700.............................................................................................................57
5.3 Configuring an IPv6 Address for an Interface..................................................................................................59
5.3.1 Establishing the Configuration Task.......................................................................................................59
5.3.2 Enabling IPv6 Packet Forwarding Capability.........................................................................................60
5.3.3 Configuring an IPv6 Link-Local Address for an Interface......................................................................60
5.3.4 Configuring an IPv6 Global Unicast Address for an Interface................................................................61
5.3.5 Checking the Configuration.....................................................................................................................62
5.4 Configuring IPv6 Neighbor Discovery.............................................................................................................62
5.4.1 Establishing the Configuration Task.......................................................................................................62
5.4.2 Configuring Static Neighbors..................................................................................................................63
5.4.3 Enabling RA Message Advertising.........................................................................................................63
5.4.4 Setting the Interval for Advertising RA Messages..................................................................................64
5.4.5 Enabling Stateful Auto Configuration.....................................................................................................65
5.4.6 Configuring the Address Prefixes to Be Advertised...............................................................................65
5.4.7 Configuring Other Information to Be Advertised...................................................................................66
5.4.8 Checking the Configuration.....................................................................................................................67
5.5 Maintaining IPv6..............................................................................................................................................68
5.5.1 Clearing IPv6 Statistics...........................................................................................................................68
5.5.2 Monitoring the Running Status of IPv6...................................................................................................69
5.5.3 Debugging IPv6.......................................................................................................................................69
5.6 Configuration Examples...................................................................................................................................70
5.6.1 Example for Setting an IPv6 Address for an Interface............................................................................70
6 IPv6 DNS Configuration............................................................................................................74
6.1 Introduction to IPv6 DNS.................................................................................................................................75
6.2 IPv6 DNS Supported by the S2700..................................................................................................................75
6.3 Configuring IPv6 DNS.....................................................................................................................................75
6.3.1 Establishing the Configuration Task.......................................................................................................75
6.3.2 Configuring a Static IPv6 DNS Entry.....................................................................................................76
6.3.3 Configuring the Dynamic IPv6 DNS Services........................................................................................76
6.3.4 Checking the Configuration.....................................................................................................................77
6.4 Maintaining IPv6 DNS.....................................................................................................................................78
6.4.1 Clearing IPv6 DNS Entries......................................................................................................................78
6.4.2 Monitoring Network Operation Status of IPv6 DNS..............................................................................79
6.5 Configuration Examples...................................................................................................................................79
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6.5.1 Example for Configuring IPv6 DNS.......................................................................................................79
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1 IP Addresses Configuration
About This Chapter
By assigning IP addresses to network devices, you can enable data communications between
the network devices.
1.1 Introduction to IP Addresses
IP is the core of the TCP/IP protocol suite. The packets of the Transmission Control Protocol
(TCP), User Datagram Protocol (UDP), Internet Control Message Protocol (ICMP), and Internet
Group Membership Protocol (IGMP) are all transmitted in the format of IP datagrams. Devices
on different networks communicate with each other using their network layer addresses, namely
IP addresses.
1.2 Features of IP Addresses Supported by the S2700
IP addresses can be obtained through static manual configuration or DHCP.
1.3 Configuring IP Addresses for Interfaces
Assigning an IP address to a device on a network enables the device to communicate with the
other devices on the network.
1.4 Configuration Examples
This section provides several examples of IP address configuration.
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Configuration Guide - IP Service 1 IP Addresses Configuration
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1.1 Introduction to IP Addresses
IP is the core of the TCP/IP protocol suite. The packets of the Transmission Control Protocol
(TCP), User Datagram Protocol (UDP), Internet Control Message Protocol (ICMP), and Internet
Group Membership Protocol (IGMP) are all transmitted in the format of IP datagrams. Devices
on different networks communicate with each other using their network layer addresses, namely
IP addresses.
To communicate with each other on Internet Protocol (IP) networks, each host must be assigned
an IP address.
An IP address is a 32-bit number that is composed of two parts, namely, the network ID and
host ID.
The network ID identifies a network and the host ID identifies a host on the network. If the
network IDs of hosts are the same, it indicates that the hosts are on the same network regardless
of their physical locations.
1.2 Features of IP Addresses Supported by the S2700
IP addresses can be obtained through static manual configuration or DHCP.
The S2700 supports IP address configuration through the following methods:
lManually configuring an IP address for an interface
lObtaining an IP address by DHCP
The S2700 supports the space overlapping of network segment addresses to save the address
space.
lDifferent IP addresses in the overlapped network segments but not same can be configured
on different interfaces of the same device. For example, after an interface on a device is
configured with the IP address 20.1.1.1/16, if another interface is configured with the IP
address 20.1.1.2/24, the system prompts a message. However, the configuration is still
successful; if another interface is configured with the IP address 20.1.1.2/16, the system
prompts an IP address conflict. The configuration fails.
lThe primary IP address and the secondary IP address in the overlapped network segments
but not same can be configured on the same interface. For example, after the interface is
configured with a primary IP address 20.1.1.1/24, if the secondary IP address is 20.1.1.2/16
sub, the system prompts a message. However, the configuration is still successful.
lThe primary IP address and the secondary IP address in the overlapped network segments
but not same can be configured on different interfaces of the same device. However, the
primary IP address and the secondary IP address cannot be the same. For example, after an
interface on a device is configured with the IP address 20.1.1.1/16, if another interface is
configured with the IP address 20.1.1.2/24 sub, the system prompts a message. However,
the configuration is still successful.
The S2700 supports 31-bit IP address masks. Therefore, there are only two IP addresses in a
network segment, that is, the network address and broadcast address. The two IP addresses can
be used as host addresses.
Quidway S2700 Series Ethernet Switches
Configuration Guide - IP Service 1 IP Addresses Configuration
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