H3C H3C S7500E Series Configuration manual

Brand: H3C

Model: H3C S7500E Series

Type: Configuration manual

H3C S7500E Series Ethernet Switches

IRF

Configuration Guide

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Document Version: 20100722-C-1.01

Product Version: Release 6605 and Later

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

Care,

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

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

G, V

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 S7500E documentation set includes 12 configuration guides, which describe the software

features for the H3C S7500E 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 IRF Configuration Guide describes how to use two S7500E switches to create an IRF virtual device

based on the IRF technology. It covers planning the switch roles in the IRF virtual device, connecting

the IRF link, and detecting and maintaining the IRF virtual device.

This preface includes:

z Audience

z Document Organization

z Conventions

z About the H3C S7500E Documentation Set

z Obtaining Documentation

z Documentation Feedback

Audience

This documentation is intended for:

z Network planners

z Field technical support and servicing engineers

z Network administrators working with the S7500E series

Document Organization

The IRF Configuration Guide comprises the following part:

IRF Configuration

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.

[ ]

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

Convention Description

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

< > Button names are inside angle brackets. For example, click <OK>.

[ ]

Window names, menu items, data table and field names are inside square

brackets. For example, pop up the [New User] window.

Multi-level menus are separated by forward slashes. 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 S7500E Documentation Set

The H3C S7500E documentation set includes:

Category Documents Purposes

Marketing brochures Describe product specifications and benefits.

Technology white papers

Provide an in-depth description of software features

and technologies.

Product description and

specifications

Card datasheets Describe card specifications, features, and standards.

Category Documents Purposes

Installation guide

Provides a complete guide to hardware installation

and hardware specifications.

H3C N68 Cabinet

Installation and Remodel

Introduction

Guides you through installing and remodeling H3C

N68 cabinets.

H3C Pluggable SFP

[SFP+][XFP] Transceiver

Modules Installation

Guide

Guides you through installing SFP/SFP+/XFP

transceiver modules.

H3C Mid-Range Series

Ethernet Switches

Pluggable Modules

Manual

Describes the hot-swappable modules available for

the Mid-Range Series Ethernet Switches, their

external views, and specifications.

H3C PoE DIMM Module

Installation Guide

Describes how to install the DIMM

(LSBM1POEDIMMH) for PoE master and slave power

management.

Hardware installation

Single PoE DIMM

Module Installation Guide

Describes how to install the 24-port DIMM

(LSQM1POEDIMMS0) for PoE power management.

Configuration guides

Describe software features and configuration

procedures.

Command references Provide a quick reference to all available commands.

Software configuration

Configuration examples

Describe typical network scenarios and provide

configuration examples and instructions.

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.

H3C

PSR320-A[PSR320-D]

Power Module User

Manual

Describes the appearance, specifications, LEDs, and

installation and removal of the H3C

PSR320-A/PSR320-D power module.

H3C

PSR650-A[PSR650-D]

Power Module User

Manual

Describes the appearance, specifications, LEDs, and

installation and removal of the H3C

PSR650-A/PSR650-D power module.

H3C

PSR1400-A[PSR1400-D]

Power Module User

Manual

Describes the appearance, specifications, LEDs, and

installation and removal of the H3C

PSR1400-A/PSR1400-D power module.

H3C PSR2800-ACV

Power Module User

Manual

Describes the appearance, specifications, LEDs, and

installation and removal of the H3C PSR2800-ACV

power module.

H3C PSR6000-ACV

Power Module User

Manual

Describes the appearance, specifications, LEDs, and

installation and removal of the H3C PSR6000-ACV

power module.

H3C PWR-SPA Power

Module Adapter User

Manual

Describes the functions and appearance of the H3C

PWR-SPA power module adapter, and how to use it

with the PSR650 power module.

Power configuration

H3C S7500E Power

Configuration Guide

Guides you to select power modules in various cases.

Category Documents Purposes

Optional cards Card manuals

The S7500E series Ethernet switches support various

card models. Each model is provided with a card

manual that describes:

z The type, number, and transmission rate of

interfaces

z Applicable switches of the card

z Required software version

z Pluggable modules supported by the card

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, 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.

Table of Contents

1 IRF Configuration ······································································································································1-1

Introduction to IRF···································································································································1-1

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

Advantages······································································································································1-1

Application·······································································································································1-2

Basic Concepts·······································································································································1-3

Working Process·····································································································································1-5

Physical Connections······················································································································1-5

Topology Collection·························································································································1-6

Role Election ···································································································································1-6

IRF Virtual Device Management and Maintenance·········································································1-7

IRF Multi-Active Detection Mechanism ···························································································1-8

IRF Virtual Device Configuration Task List·····························································································1-9

Switching Operating Mode····················································································································1-10

Configuring an IRF Virtual Device·········································································································1-11

Setting a Member ID for a Device·································································································1-11

Specifying a Priority for a Member Device····················································································1-12

Configuring IRF Ports····················································································································1-12

Specifying the Preservation Time of IRF Bridge MAC Address····················································1-13

Setting the Delay Time for the Link Layer to Report a Link-Down Event······································1-14

Configuring MAD Detection···········································································································1-15

Accessing an IRF Virtual Device···········································································································1-22

Accessing the Master····················································································································1-22

Accessing a Slave·························································································································1-22

Displaying and Maintaining an IRF Virtual Device················································································1-23

IRF Virtual Device Configuration Examples··························································································1-23

Configuration Example of Using the BFD MAD Detection····························································1-23

Configuration Example of Using the LACP MAD Detection··························································1-26

2 Index ···························································································································································2-1

1-1

1 IRF Configuration

This chapter includes these sections:

z Introduction to IRF

z Basic Concepts

z Working Process

z IRF Virtual Device Configuration Task List

z Switching Operating Mode

z Configuring an IRF Virtual Device

z Accessing an IRF Virtual Device

z Displaying and Maintaining an IRF Virtual Device

z IRF Virtual Device Configuration Examples

Introduction to IRF

Overview

Developed by H3C, Intelligent Resilient Framework (IRF) provides a new method to connect multiple

devices through physical IRF ports. Individual devices join to form a distributed device called IRF virtual

device. IRF realizes the cooperation, unified management, and non-stop maintenance of multiple

devices.

z At present, the S7500E Series Ethernet Switches support an IRF virtual device of two members,

which means you can use two S7500E series switches to form an IRF virtual device: one operates

as the master and the other operates as the slave.

z At present, the S7503E, S7506E, S7510E and S7506E-V support IRF.

Advantages

IRF features the following advantages:

z Streamlined management. When an IRF virtual device is established, you can log in to it by

connecting to any port of any member to manage all members of the IRF virtual device.

z High reliability. An IRF virtual device comprises multiple member devices: the master runs,

manages and maintains the IRF virtual device, whereas the slaves process services as well as

functioning as the backups. As soon as the master fails, the IRF virtual device immediately elects a

new master to prevent service interruption. In addition, not only the IRF links of members can be

aggregated, but also the physical links between the IRF virtual device and the upper or lower layer

1-2

devices can be aggregated, and thus the reliability of the IRF virtual device is increased through

link redundancy.

z Powerful network expansion capability. By adding member devices, the number of IRF ports and

network bandwidth of an IRF virtual device can be easily expanded. Each member device has its

own CPU and they can process and forward protocol packets independently. Therefore, the

processing capability of the IRF virtual device also can be easily expanded.

Application

As shown in Figure 1-1, a master and a slave form an IRF virtual device, which is a single device to the

upper and lower layer devices.

Figure 1-1 IRF networking

IP network

IRF virtual device

IP network

IRF link

Equal to

Master

Slave

1-3

Basic Concepts

Figure 1-2 IRF implementation schematic diagram

As shown in

Figure 1-2, Device A and Device B are physically connected. After you perform necessary

configurations on them, they form an IRF virtual device, which has four switching and routing

processing units (SRPUs) (one active SRPU and three standby SRPUs) and two interface cards. The

IRF virtual device manages both the physical and software resources of Device A and Device B.

The IRF technology involves the following basic concepts:

Operation mode

The device can operate in either of the following two modes:

z Standalone mode: The device operates in a standalone manner. It cannot form any IRF virtual

device with other devices.

z IRF mode: The device can connect with other devices to form an IRF virtual device.

You can switch the operating mode of the device at the command line interface (CLI).

Role

The devices that form an IRF virtual device are called member devices. Each of them plays either of the

following two roles:

z Master: Manages the IRF virtual device.

z Slave: All members that operate as the backups of the master are called slaves. When the master

fails, the IRF virtual device automatically elects a new master from one of the slaves.

1-4

Master and slaves are elected through the role election mechanism. An IRF virtual device has only one

master at a time. Other members are the slaves. For more information about the role election process,

see

Role Election.

Active SRPU of a member device

An active SRPU of a member device is an essential hardware configuration and manages the member

device.

When the device joins an IRF virtual device, its active SRPU plays double roles:

z The role on the member device: The active SRPU manages the member device, such as, the

synchronization between the active SRPU and the standby SRPU, processing protocol packets,

and generation and maintenance of route entries.

z The role on the IRF virtual device: The active SRPU processes IRF virtual device related events,

such as role election and topology collection.

Standby SRPUs of a member device

A standby SRPU of a member device is an optional hardware configuration and acts as the backup of

the active SRPU of the member device.

The active SRPU of an IRF virtual device

The active SRPU of an IRF virtual device is the active SRPU of the master and manages the whole IRF

virtual device.

Standby SRPUs of an IRF virtual device

A standby SRPU of an IRF virtual device is a backup of the active SRPU of the IRF virtual device. A

SRPU of a member device is a standby SRPU of the IRF virtual device unless it is the active SRPU of

the IRF virtual device.

IRF port

An IRF port is a logical port dedicated to the internal connection of an IRF virtual device. An IRF port can

be numbered as IRF-port1 or IRF-port2. An IRF port is effective only after it is bound to a physical IRF

port.

Physical IRF port

Physical ports used for IRF connection on devices are called physical IRF ports. On the S7500E series,

you can configure a 10 GE optical port as a physical IRF port.

By default, a 10 GE optical port functions as a common service port and forwards data traffic. When

bound with an IRF port, it acts as an IRF physical port and forwards packets among member devices.

Packets that can be forwarded include IRF-related negotiation packets, and data packets that need to

be forwarded cross-devices.

IRF virtual device merge

As shown in Figure 1-3, two IRF virtual devices operate independently and steadily. Connect them

physically and perform necessary configurations to make them form one IRF virtual device. This

process is called IRF virtual device merge.

1-5

Figure 1-3 IRF virtual device merge

IRF virtual device partition

As shown in Figure 1-4, when an IRF virtual device is formed, the failure of the IRF link causes physical

disconnection between the two members, and then the IRF virtual device is divided into two IRF virtual

devices. This process is called IRF virtual device partition.

Figure 1-4 IRF partition

Member priority

Member priority determines the role of a member during a role election process. A member with a

higher priority is more likely to be a master. The priority of a device defaults to 1. You can modify the

priority at the CLI.

Working Process

IRF virtual device management involves four stages: Physical Connections, Topology Collection, Role

Election

, and IRF Virtual Device Management and Maintenance. The members of an IRF virtual device

are physically connected first, and then they perform topology collection and role election to establish

an IRF virtual device, which then enters the IRF virtual device management and maintenance stage.

Physical Connections

To establish an IRF virtual device, physically connect the physical IRF ports of member devices.

Then, you need to bind a physical IRF port to an IRF port. As a logical port, an IRF port can bind to one

physical IRF port or, to realize link backup, can bind to multiple physical IRF ports (known as aggregate

IRF port).

The S7500E series uses 10 GE optical ports as physical IRF ports. You can connect physical IRF ports

with fibers. Fibers connect physical devices located very far from each other and provide flexible

application.

An IRF virtual device typically has a daisy chain connection, which means IRF-port1 of a member is

connected to IRF-port2 of another, and the two devices are connected to form a single straight

connection, as shown in

Figure 1-5.

1-6

Figure 1-5 Physical connections of IRF virtual device

The orange line in the figure represents the IRF link, which is different from a common Ethernet link. An

IRF link can be composed of either one physical cable or multiple physical links.

Topology Collection

Each member exchanges hello packets with the directly connected neighbors to collect topology of the

IRF virtual device. The hello packets carry the topology information, including IRF port connection

states, member IDs, priorities, and bridge MAC addresses.

Each member is managed by its active SRPU, which records its known topology information locally. At

the startup of a member device, the active SRPU of the member device records topology information of

the member device. When an IRF port of the member device becomes up, the active SRPU of the

member device performs the following operations:

1) Periodically sends its known topology information from this port.

2) Upon receiving the topology information from the directly connected neighbor, it updates the local

topology information.

3) If a standby SRPU is available on the member device, the active SRPU synchronizes its recorded

topology information to the standby SRPU to ensure that the topology information on both cards is

consistent.

After topology collection lasts for a period of time, all members have obtained the complete topology

information (known as topology convergence), and then the IRF virtual device enters the next stage:

role election.

Role Election

The process of defining the role (master or slave) of members is role election.

Role election is held when the topology changes, such as, forming an IRF virtual device, adding a new

member, leaving or failure of the master, or IRF virtual device merge. The master is elected based on

the rules below, in the order specified. If the first rule does not apply, a second rule is tried, and so on,

until the only winner is found.

z The current master, even if a new member has a higher priority. (When an IRF virtual device is

being formed, all member devices consider themselves as the master, so this principle is skipped)

z A member with a higher priority.

z A member with the longest system up-time. (The system up-time information of each member

device is delivered through IRF hello packets)

z A member with the lowest bridge MAC address.

Then, the IRF virtual device is formed and enters the next stage: IRF virtual device management and

maintenance.

1-7

During the mergence, IRF election is held, and role election rules are followed. You need to manually

reboot the members of the loser side, and then they join the winner side as slaves.

IRF Virtual Device Management and Maintenance

After role election, an IRF virtual device is established: all member devices operate as one virtual

device, and all resources on the member devices are possessed by this virtual device and managed by

the master.

Member ID

An IRF virtual device uses member IDs to uniquely identify and manage its members. Member IDs are

used in interface numbering and file management:

z In interface numbering: Assume an interface on the device that operates in standalone mode was

named GigabitEthernet 3/0/1. After the device joined an IRF virtual device, it got a member ID of

2, and the name of the interface changes to GigabitEthernet 2/3/0/1.

z In file management: For example, when the device operates in standalone mode, the path of a file

was slot1#flash:/test.cfg. After the device joined an IRF virtual device, the path changes to

chassis1#slot1#flash:/test.cfg, which indicates that the file is saved on the card in slot 1 of member

device 1.

Therefore, to ensure the uniqueness of member IDs, you need to plan and configure the member IDs of

devices uniformly before they join the IRF virtual device.

If the active SRPU and standby SRPU of a member device keep different member IDs of the device, the

member ID kept by the active SRPU is applied when the device starts up. If the device with the member

ID of 2 has only one active SRPU, after you plug in a standby SRPU that keeps a member ID of 3, the

member ID of the device is still 2 and the member ID kept on the standby SRPU is synchronized to 2.

IRF virtual device topology maintenance

Direct neighbors of an IRF virtual device periodically exchange hello packets. A device may not receive

hello packets if either of the following conditions occurs:

z The link state is abnormal, that is, the link fails or is unidirectional.

z The device is attacked.

Without receiving any hello packet from a direct neighbor within ten seconds, a member considers that

the hello packets timed out, and the slaves will reboot and try to join the IRF virtual device again.

Besides, if the IRF ports are not connected correctly (that is, IRF-port1 of a device is connected to

IRF-port2 of another device), the slaves will reboot and try to join the IRF virtual device again.

1-8

Therefore, to make the IRF virtual device operate normally, you need to make sure that the link state is

normal and connect the IRF ports of two devices correctly before configuring an IRF virtual device; after

the establishment of the IRF virtual device, configure necessary anti-attack policies to ensure device

safety.

Recovery of an IRF virtual device after IRF partition

If two member devices of an IRF virtual device cannot communicate with each other due to link failure,

the IRF virtual device is divided into two independent IRF virtual devices, each of which has only one

member device. Then, you need to repair the IRF link. After IRF link recovery, both of the two IRF virtual

devices prompt you that an IRF virtual device merge will happen, and then you can reboot one of the

two member devices to complete the merge. Then, the rebooted device joins the IRF virtual device

whose member device is not rebooted as the slave.

IRF Multi-Active Detection Mechanism

A link disconnection causes an IRF virtual device to divide into two IRF virtual devices that operate with

the same global configuration. Because these IRF virtual devices cause address collision, network

failure probably extends. To address this problem, the multi-active detection (MAD) mechanism is

introduced. The MAD mechanism detects the presence of multiple identical IRF virtual devices and

handles the problem to decrease the influences to services caused by IRF virtual device partition. The

MAD mechanism provides the following functions:

z Detection: Enabled for an IRF virtual device, the MAD mechanism detects the network for multiple

active IRF virtual devices with the same global configuration. This is done with the Link

Aggregation Control Protocol (LACP), and the Bidirectional Forwarding Detection (BFD) protocol.

z Collision handling: When an IRF virtual device is partitioned, if multiple identical active IRF virtual

devices are detected, the MAD mechanism keeps only the one with the lowest master ID to operate

normally (keeping the active state). The state of all the other IRF virtual devices is set to recovery

(disabled) and all physical ports (usually the ports for forwarding data traffic) are shut down except

for the reserved ones to make sure that these IRF virtual devices cannot forward data traffic.

z Failure recovery: The MAD mechanism prompts you for multi-active collision, and the device then

tries to repair the failed IRF links . If the reparation fails, you need to manually repair the failed links.

To make the partitioned IRF virtual devices merge again after the links are repaired, manually

restart the recovery IRF virtual device, and then it restores to the active state, and all disabled ports

come up to forward traffic.

1-9

z For information about LACP, see Ethernet Link Aggregation Configuration in the Layer 2 - LAN

Switching Configuration Guide; for information about BFD, see BFD Configuration in the High

Availability Configuration Guide.

z When an IRF virtual device is partitioned, the system disables all service ports on the member

device of the IRF virtual device that transits to recovery state (that is equal to executing the

shutdown command on these ports). However, some ports are not disabled and are called

reserved ports. By default, only the physical IRF ports are reserved ports. To set other ports (such

as the port for telnetting) to reserved ports, configure them at the CLI.

IRF Virtual Device Configuration Task List

To establish an IRF virtual device, follow these steps:

1) Plan the network and determine which device will be the master, the member IDs, and physical

connections of devices.

2) Switch the operating mode of the devices to IRF (after this step, the devices reboot automatically).

3) Change the member IDs of member devices (reboot the devices to make the member IDs

effective).

4) Change the priorities of member devices (to enable a member device to be elected as the master

after the role election, specify the priority for the member device).

5) Configure IRF ports.

6) To make sure that IRF configurations can take effect after device reboot, save the current

configurations to the configuration file to be used at the next startup of the member devices.

7) Power off the IRF member devices and connect them with cables and make sure that physical IRF

ports are interoperable.

8) Reboot all member devices and the IRF virtual device is established.

Complete the following tasks to configure IRF virtual device:

Task Remarks

Switching Operating Mode Optional

Setting a Member ID for a Device Required

Specifying a Priority for a Member Device Optional

Configuring IRF Ports Optional

Specifying the Preservation Time of IRF Bridge MAC

Address

Optional

Configuring an IRF Virtual

Device

Setting the Delay Time for the Link Layer to Report a

Link-Down Event

Optional

Correctly connect the physical IRF ports with cables, and then reboot member devices.

Enabling BFD MAD detection Optional Configuring MAD Detection

Enabling LACP MAD detection Optional

1-10

Task Remarks

Specifying the reserved ports Optional

Failure recovery Optional

Accessing the Master Required

Accessing an IRF Virtual

Device

Accessing a Slave Optional

After establishing an IRF virtual device, you are recommended to configure the MAD detection function

to avoid the influences to the network caused by accidental partition of the IRF virtual device.

Switching Operating Mode

The device can operate in either IRF mode or standalone mode.

z IRF mode: When a device works in this mode, it interconnects with other devices to form an IRF

virtual device.

z Standalone mode: The device operates in a standalone manner. It does not form any IRF virtual

device with other devices. In this mode, the IRF function is disabled on the device, so the device

does not execute any IRF-related command.

When an EPON card is installed on an S7500E switch, the switch can work as an OLT device in an

EPON system. Note that:

z When the switch operates in standalone mode (in other words, IRF is not enabled on the switch),

the OLT function can operate normally; when the switch operates in IRF mode (in other words, IRF

is enabled on the switch), the OLT cards cannot start.

z For more information about the OLT function, see EPON Configurarion and related chapters in the

Layer 2 - LAN Switching Configuration Guide.

If the device is operating in standalone mode and is to be added into an IRF virtual device, follow these

steps to configure it:

1) Switch the operating mode of the device to IRF mode, and then the device automatically reboots.

2) Set a member ID for the device and then reboot the device to make the configuration effective.

3) Configure IRF ports and save the configuration.

4) Power off the device and then physically connect it to another device that operates in IRF mode.

5) Power on the device, and then the device joins the IRF virtual device.

Follow these steps to switch the operating mode of the device to IRF mode:

1-11

To do… Use the command… Remarks

Enter system view

system-view

—

Switch the operating mode of the

device to IRF mode

chassis convert mode irf

Required

By default, the device operates

in standalone mode.

The device automatically reboots as soon as you confirm the operation of switching the operating

mode.

Configuring an IRF Virtual Device

Setting a Member ID for a Device

The member ID of a device defaults to 1. Before an IRF virtual device is formed, you need to manually

number the two devices respectively to avoid member ID collision.

You are recommended to set the member ID for a newly added device in the following way:

1) Plan the member IDs in advance. You can view the member IDs of an IRF virtual device, and find

out an unused ID for the new device.

2) If the device is already an IRF member, plug out the cables.

3) Log in to the device to be added into the IRF virtual device, change the current member ID of the

device to the planned member ID.

Follow these steps to set a member ID for a device:

To do… Use the command… Remarks

Enter system view

system-view

—

Set a member ID for a device

irf member

member-id

renumber

new-member-id

Optional

The member ID of a device

defaults to 1

z The above setting takes effect after the reboot of the device.

z In an IRF virtual device, member IDs are not only used to identify devices, but also used to

configure IRF ports and member priorities. Therefore, modifying a member ID may cause device

configuration changes or even losses. Please modify member ID with caution. For example,

suppose that you configure an IRF port, save the configuration, modify the member ID of the device,

and reboot the device. Since the first dimension of the interface name is the member ID, when the

member ID is changed, the configuration of the IRF port becomes invalid.

1-12

Specifying a Priority for a Member Device

Each IRF member device has a priority. The greater the priority value, the higher the priority. A member

with a higher priority is more likely to be a master.

The priority of a device defaults to 1. You can modify the priority at the CLI.

Follow these steps to specify a priority for a member device:

To do… Use the command… Remarks

Enter system view

system-view

—

Specify a priority for a member

device

irf member

member-id

priority

Optional

The priority of a member defaults

to 1.

Configuring IRF Ports

The S7500E series uses 10 GE optical ports, which are on the SRPU, or on SC, SD, or EB interface

card, as physical IRF ports to perform IRF connection. For more information about LPUs providing 10

GE optical ports, see the related information in the H3C S7500E Series Ethernet Switches Installation

Manual.

An IRF port is a logical port. An IRF virtual device can be effective on a device only when IRF ports are

configured (in other words, the IRF ports are bound to physical IRF ports). An IRF port can be bound to

either one or multiple physical IRF ports. The maximum number of physical IRF ports that can be bound

to an IRF port is eight on an S7500E switch.

Follow these steps to configure IRF ports:

To do… Use the command… Remarks

Enter system view

system-view

—

Create an IRF port and enter IRF

port view

irf-port

member-id/port-number

Required

By default, no IRF port is created

on the device.

If the IRF port is already created,

this command enters IRF port

view.

Bind physical IRF port(s) to an

IRF port

port group interface

interface-type

interface-number [

mode

{

enhanced

normal

} ]

Required

By default, no IRF port is created

on the device.

1-13

z An IRF port that is bound with multiple physical IRF ports is an aggregation IRF port, which

increases the bandwidth and reliability on the IRF port.

z You can bind multiple physical IRF ports to one IRF port by executing the port group interface

command for multiple times. In addition, the S7500E series allows you to bind multiple physical IRF

ports on different LPUs to one IRF port.

z Before binding a physical IRF port to an IRF port or canceling such a binding, you must manually

disable the physical IRF port (in other words, execute the shutdown command on the port). After

finishing your operation, manually enable the physical IRF port (in other words, execute the undo

shutdown command on the port).

z The mode keyword in the port group command specifies the working mode of a physical IRF port.

By default, the working mode of a physical IRF port is normal. An SC interface card does not

support configuration of the working mode of physical IRF ports as enhanced.

z Physical IRF ports that connect two member devices of an IRF virtual device must be configured to

work in the same mode.

z To use the virtual private LAN service (VPLS) function in an IRF virtual device, configure the

working mode of physical IRF ports as enhanced.

Specifying the Preservation Time of IRF Bridge MAC Address

A device uses the bridge MAC address when it communicates with the outside as a network bridge. A

bridge device on the network has its unique bridge MAC address. Some Layer 2 protocols (like LACP)

use bridge MAC addresses to identify different devices. During the forwarding of Layer 2 packets, if the

destination MAC address of a packet is the bridge MAC address of a device, it means that the packet is

sent to this device.

In an IRF virtual device, the bridge MAC address of a member device is called member bridge MAC

address. The IRF virtual device communicates with the outside as a single device; therefore, it also has

a bridge MAC address, which is called the bridge MAC address of the IRF virtual device. Typically, an

IRF virtual device uses the bridge MAC address of the master as its bridge MAC address.

You are recommended to configure the preservation time of bridge MAC address of the IRF virtual

device properly, otherwise, network problems will occur:

z If a master leaves an IRF virtual device to join another IRF virtual device or to operate

independently and the IRF virtual device is configured to preserve the bridge MAC address

permanently, bridge MAC address collision occurs and thus causes network communication

problem.

z If the master leaves the IRF virtual device because of reboot or link failure and the IRF virtual

device is configured to change the bridge MAC address of the IRF virtual device as soon as the

master leaves, the unnecessary switch of bridge MAC address occurs and thus causes flow

interruption.

Therefore, configure the preservation time of bridge MAC address of the IRF virtual device according to

your network status:

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H3C H3C S7500E Series Configuration manual

H3C H3C S7500E Series Configuration manual

H3C H3C S7500E Series Configuration manual

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