Huawei Quidway S9300 User manual

Quidway S9300 Terabit Routing Switch
V100R001C03
Configuration Guide - IP Service
Issue 02
Date 2009-08-06
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.

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Contents
About This Document.....................................................................................................................1
1 IP Address Configuration.........................................................................................................1-1
1.1 Introduction to IP Addresses...........................................................................................................................1-2
1.2 IP Address Features Supported by the S9300.................................................................................................1-2
1.3 Assigning IP Addresses to Interfaces..............................................................................................................1-2
1.3.1 Establishing the Configuration Task......................................................................................................1-2
1.3.2 Setting a Primary IP Address for an Interface........................................................................................1-3
1.3.3 (Optional) Setting a Secondary IP Addresses for an Interface...............................................................1-4
1.3.4 Checking the Configuration...................................................................................................................1-4
1.4 Setting Unnumbered IP Addresses..................................................................................................................1-4
1.4.1 Establishing the Configuration Task......................................................................................................1-5
1.4.2 Setting the Primary IP Address..............................................................................................................1-5
1.4.3 Setting the Unnumbered IP Address......................................................................................................1-6
1.4.4 Checking the Configuration...................................................................................................................1-6
1.5 Configuration Examples..................................................................................................................................1-7
1.5.1 Example for Setting Primary and Secondary IP Addresses...................................................................1-7
1.5.2 Example for Configuring a Tunnel Interface to Borrow the IP Address of a Loopback Interface........1-9
2 DHCP Configuration.................................................................................................................2-1
2.1 Introduction to DHCP.....................................................................................................................................2-2
2.2 DHCP Features Supported by the S9300........................................................................................................2-2
2.3 Configuring the DHCP Relay Agent...............................................................................................................2-2
2.3.1 Establishing the Configuration Task......................................................................................................2-2
2.3.2 Configuring a DHCP Server Group.......................................................................................................2-3
2.3.3 Enabling DHCP Relay...........................................................................................................................2-4
2.3.4 Binding an Interface to a DHCP Server Group......................................................................................2-4
2.3.5 Checking the Configuration...................................................................................................................2-5
2.4 Configuring the S9300 to Request the DHCP Server to Release an IP Address of a Client..........................2-5
2.4.1 Establishing the Configuration Task......................................................................................................2-5
2.4.2 Configuring the S9300 to Request the DHCP Server to Release an IP Address of a Client.................2-6
2.4.3 Checking the Configuration...................................................................................................................2-7
2.5 Maintaining DHCP..........................................................................................................................................2-7
2.5.1 Clearing DHCP Statistics.......................................................................................................................2-7
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2.5.2 Monitoring the Running Status of DHCP..............................................................................................2-7
2.6 Configuration Examples..................................................................................................................................2-8
2.6.1 Example for Configuring the DHCP Relay Agent.................................................................................2-8
2.6.2 Example for Configuring the DHCP Relay in a Super VLAN............................................................2-10
3 IP Performance Configuration.................................................................................................3-1
3.1 IP Performance Supported by the S9300........................................................................................................3-2
3.2 Optimizing IP Performance.............................................................................................................................3-2
3.2.1 Establishing the Configuration Task......................................................................................................3-2
3.2.2 Enabling an Interface to Check the Source IP Addresses of Packets.....................................................3-3
3.2.3 Configuring Forcible Fragmentation of Outgoing Packets on an Interface...........................................3-4
3.2.4 Setting ICMP Parameters.......................................................................................................................3-4
3.2.5 Setting TCP Parameters.........................................................................................................................3-6
3.2.6 Setting the Load Balancing Mode of IP Packet Forwarding..................................................................3-7
3.2.7 Checking the Configuration...................................................................................................................3-7
3.3 Maintaining IP Performance...........................................................................................................................3-8
3.3.1 Clearing IP Performance Statistics.........................................................................................................3-8
3.3.2 Monitoring the Running Status of IP Performance................................................................................3-9
3.3.3 Debugging IP Performance..................................................................................................................3-10
3.4 Configuration Examples................................................................................................................................3-11
3.4.1 Example for Disabling the Sending of ICMP Redirection Packets.....................................................3-11
3.4.2 Example for Configuring ICMP Host Unreachable Packets................................................................3-14
3.4.3 Example for Optimizing System Performance by Discarding Certain ICMP Packets........................3-16
4 IP Unicast PBR Configuration.................................................................................................4-1
4.1 Introduction to IP Unicast PBR.......................................................................................................................4-2
4.2 IP Unicast PBR Features Supported by the S9300.........................................................................................4-2
4.3 Configuring IP Unicast PBR...........................................................................................................................4-2
4.3.1 Establishing the Configuration Task......................................................................................................4-2
4.3.2 Defining Matching Rules for PBR.........................................................................................................4-3
4.3.3 Defining Actions of PBR.......................................................................................................................4-4
4.3.4 Applying a Policy-based Route..............................................................................................................4-5
4.3.5 Checking the Configuration...................................................................................................................4-6
4.4 Maintaining IP Unicast PBR...........................................................................................................................4-6
4.4.1 Monitoring the Running Status of IP Unicast PBR................................................................................4-6
4.4.2 Debugging IP Unicast PBR....................................................................................................................4-7
4.5 Configuration Examples..................................................................................................................................4-7
4.5.1 Example for Configuring PBR Based on the Protocol Type.................................................................4-7
4.5.2 Example for Configuring PBR Based on the Packet Length...............................................................4-11
5 UDP Helper Configuration......................................................................................................5-1
5.1 Introduction to UDP Helper............................................................................................................................5-2
5.2 UDP Helper Features Supported by the S9300...............................................................................................5-2
5.3 Configuring UDP Helper................................................................................................................................5-3
Contents
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5.3.1 Establishing the Configuration Task......................................................................................................5-3
5.3.2 Enabling the UDP Helper Function.......................................................................................................5-4
5.3.3 (Optional) Configuring the UDP Port on Which Packets Are Forwarded.............................................5-4
5.3.4 Configuring the Destination Server for Packet Relay............................................................................5-5
5.3.5 Checking the Configuration...................................................................................................................5-5
5.4 Maintaining UDP Helper................................................................................................................................5-6
5.4.1 Clearing UDP Helper Statistics..............................................................................................................5-6
5.4.2 Monitoring the Running Status of UDP Helper.....................................................................................5-6
5.5 Configuration Examples..................................................................................................................................5-6
5.5.1 Example for Configuring UDP Helper...................................................................................................5-7
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Figures
Figure 1-1 Networking diagram for setting IP addresses.....................................................................................1-7
Figure 1-2 Networking diagram for configuring a tunnel interface to borrow an IP address of a loopback interface
...............................................................................................................................................................................1-9
Figure 2-1 Networking diagram for configuring the DHCP relay agent..............................................................2-8
Figure 2-2 Networking diagram for configuring the DHCP relay in a super VLAN.........................................2-11
Figure 3-1 Networking diagram for disabling the sending of ICMP redirection packets..................................3-11
Figure 3-2 Networking diagram for disabling the sending of ICMP host unreachable packets........................3-14
Figure 3-3 Networking for configuring ICMP security function.......................................................................3-17
Figure 4-1 Networking diagram for configuring PBR based on the protocol type..............................................4-8
Figure 4-2 Networking diagram for configuring PBR based on the packet length............................................4-11
Figure 5-1 Networking diagram for configuring UDP helper..............................................................................5-7
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Tables
Table 4-1 Relations between values and keywords..............................................................................................4-5
Table 5-1 Lists of default UDP ports on which packets are forwarded after the UDP helper function is enabled
...............................................................................................................................................................................5-2
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About This Document
Purpose
This document describes the configurations of the IP services of the S9300, including the basic
knowledge and configurations of secondary IP addresses, DHCP, IP performance, IP unicast
policy-based routing, UDP Helper, . By reading this document, you can learn the concepts and
configuration procedures of IP services.
Related Versions
The following table lists the product versions related to this document.
Product Name Version
S9300 V100R001C03
Intended Audience
This document is intended for:
lPolicy planning engineers
lInstallation and commissioning engineers
lNM configuration engineers
lTechnical support engineers
Organization
This document is organized as follows.
Chapter Description
1 IP Address Configuration Describes the general procedure for setting IP addresses.
2 DHCP Configuration Describes the principle of DHCP and provides configuration
procedures and examples of DHCP.
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Chapter Description
3 IP Performance
Configuration
Describes the principle of IP performance and provides
configuration procedures and examples of IP performance.
4 IP Unicast PBR
Configuration
Describes the principle of IP unicast PBR and provides
configuration procedures and examples of IP unicast PBR.
5 UDP Helper
Configuration
Describes the principle of UDP helper and provides
configuration procedures and examples of UDP helper.
Conventions
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.
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention Description
Times New Roman Normal paragraphs are in Times New Roman.
Boldface Names of files, directories, folders, and users are in
boldface. For example, log in as user root.
Italic Book titles are in italics.
About This Document
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Convention Description
Courier New Examples of information displayed on the screen are in
Courier New.
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.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention Description
Boldface Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.
>Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
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Format Description
Key Press the key. For example, press Enter and press Tab.
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
Action Description
Click Select and release the primary mouse button without moving
the pointer.
Double-click Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag Press and hold the primary mouse button and move the
pointer to a certain position.
Update History
Updates between document issues are cumulative. Therefore, the latest document issue contains
all updates made in previous issues.
Updates in Issue 02 (2009-08-06)
Based on issue 01 (2009-07-28), the document is updated as follows:
The following information is modified: The link to 1 IP Address Configuration is corrected.
Updates in Issue 01 (2009-07-28)
Initial commercial release.
About This Document
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1 IP Address Configuration
About This Chapter
This chapter describes the concept and configuration procedures of the IP addresses on the
S9300.
1.1 Introduction to IP Addresses
This section describes the concept of IP addresses.
1.2 IP Address Features Supported by the S9300
This section describes the methods for setting the IP addresses for the S9300.
1.3 Assigning IP Addresses to Interfaces
This section describes the procedure for assigning the IP addresses to interfaces.
1.4 Setting Unnumbered IP Addresses
This section describes how to configure a tunnel interface to use the address of the loopback
interface.
1.5 Configuration Examples
This section provides several examples of IP address configuration.
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1.1 Introduction to IP Addresses
This section describes the concept of IP addresses.
Each host needs an IP address to communicate with each other on an IP network.
An IP address is a 32-bit address used on the Internet. It consists of a network ID and a host ID.
The network ID identifies a network and the host ID identifies a specific network device on the
network. If multiple network devices have the same network ID, they reside on the same network
regardless of their physical locations.
1.2 IP Address Features Supported by the S9300
This section describes the methods for setting the IP addresses for the S9300.
The S9300 supports the following methods for setting IP addresses:
lSetting static IP addresses for interfaces manually
lConfiguring an interface to borrow an IP address from other interfaces
To save IP address spaces, the S9300 enables you to configure the address mask of an interface
as 31 bits. In this case, there are two IP addresses on a subnet: the subnet address and the broadcast
address of the subnet. Both the addresses are called host addresses.
1.3 Assigning IP Addresses to Interfaces
This section describes the procedure for assigning the IP addresses to interfaces.
1.3.1 Establishing the Configuration Task
1.3.2 Setting a Primary IP Address for an Interface
1.3.3 (Optional) Setting a Secondary IP Addresses for an Interface
1.3.4 Checking the Configuration
1.3.1 Establishing the Configuration Task
Applicable Environment
To run IP services on an interface, you need to set an IP address for the interface. Each interface
of the S9300 can be assigned with multiple IP addresses, in which one is the primary IP address
and the others are secondary IP addresses.
Generally, only one IP address, namely, the primary IP address, is required for an interface. In
special cases, the secondary IP addresses need to be set for the interface. For example, the
S9300 is connected to a physical network through an interface. The hosts on this physical
network belong to two Class C networks. In this case, you need to set a primary IP address and
a secondary IP address on the interface of the S9300. The S9300 can then communicate with all
the hosts on the physical network.
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Pre-configuration Tasks
Before setting an IP address for an interface, complete the following tasks:
lConnecting interfaces and setting the physical parameters of each interface to make the
physical layer in Up state
lSetting parameters of the link layer protocol for interfaces and ensuring that the status of
the link layer protocol on the interfaces is Up
Data Preparation
To set an IP address for an interface, you need the following data.
No. Data
1Interface number
2 IP address and subnet mask of the interface
3 (Optional) Secondary IP address and subnet
mask of the interface
1.3.2 Setting a Primary IP Address for an Interface
Context
Do as follows on the S9300.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
ip address ip-address { mask | mask-length }
The IP address of the interface is set.
One interface has only one primary IP address. If a primary IP address is already set on an
interface when a new primary IP address is set, the original primary IP address is deleted and
the new primary IP address takes effect.
----End
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1.3.3 (Optional) Setting a Secondary IP Addresses for an Interface
Context
Do as follows on the S9300.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
ip address ip-address { mask | mask-length } sub
The secondary IP address of the interface is set.
The secondary IP address with a 31-bit mask can be set for the interface.
Each interface supports up to 31 secondary IP addresses.
NOTE
The primary and secondary IP addresses of the same interface or different secondary IP addresses of the
same interface cannot be in the same network segment.
----End
1.3.4 Checking the Configuration
Context
All configurations are complete.
Procedure
Step 1 Run the display ip interface [ interface-type interface-number ] command to view the settings
of IP addresses on the interface.
Step 2 Run the display ip interface brief [ interface-type [ interface-number ] ] command to view brief
information about IP addresses on the interface.
----End
1.4 Setting Unnumbered IP Addresses
This section describes how to configure a tunnel interface to use the address of the loopback
interface.
1.4.1 Establishing the Configuration Task
1.4.2 Setting the Primary IP Address
1 IP Address Configuration
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1.4.3 Setting the Unnumbered IP Address
1.4.4 Checking the Configuration
1.4.1 Establishing the Configuration Task
Applicable Environment
In certain application environment, an interface needs to be configured to borrow an IP address
from another interface, thus saving IP addresses. Sometimes, an interface that is rarely used can
be configured to borrow an IP address from another interface. Configuring such interface with
a fixed IP address is unnecessary.
At present, the S9300 only allows the tunnel interface to borrow the IP address of the loopback
interface.
Pre-configuration Tasks
Before configuring an unnumbered address for an interface, complete the following tasks:
lSetting the physical attributes of the interface that borrows an IP address and the interface
that lends an IP address
lSetting the link layer protocol of the interface that borrows an IP address and the interface
that lends an IP address
Data Preparation
To set an unnumbered IP address for an interface, you need the following data.
No. Data
1Number, IP address, and mask of the interface
that lends an IP address
2 Number of the interface that borrows an IP
address
NOTE
This section describes only the configuration of IP address unnumbered.
Because the interface that borrows an IP address does not have an IP address itself, the dynamic routing
protocol cannot be enabled on such an interface. Therefore, you must manually set a static route to the
remote network segment to implement the interconnection between S9300s.
1.4.2 Setting the Primary IP Address
Context
Do as follows on the S9300.
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Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
ip address ip-address { mask | mask-length }
The primary IP address of the interface is set.
----End
1.4.3 Setting the Unnumbered IP Address
Context
Do as follows on the S9300.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
ip address unnumbered interface interface-type interface-number
The interface is configured to borrow the IP address of a specified interface.
----End
1.4.4 Checking the Configuration
Context
All configurations are complete.
Procedure
Step 1 Run the display ip interface [ interface-type interface-number ] command to view information
about IP addresses on the interface.
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