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CHAPTER

4-1

Cisco IOS Software Configuration Guide, Release 12.2SX

OL-13013-06

Configuring Virtual Switching Systems

This chapter describes how to configure a virtual switching system (VSS) for the Catalyst 6500 series

switch. Cisco IOS Release 12.2(33)SXH1 and later releases support VSS.

Note For complete syntax and usage information for the commands used in this chapter, see these

publications:

• The Cisco IOS Virtual Switch Command Reference at this URL:

http://www.cisco.com/en/US/docs/ios/vswitch/command/reference/vs_book.html

• The Cisco IOS Release 12.2 publications at this URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_installation_and_configuratio

n_guides_list.html

Tip For additional information about Cisco Catalyst 6500 series switches (including configuration examples

and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html

This chapter consists of these sections:

• Understanding Virtual Switching Systems, page 4-1

• VSS Configuration Guidelines and Restrictions, page 4-27

• Configuring a VSS, page 4-29

• Upgrading a VSS, page 4-54

Understanding Virtual Switching Systems

These sections describe a VSS:

• VSS Overview, page 4-2

• VSS Redundancy, page 4-11

• Multichassis EtherChannels, page 4-14

1 2 3 4 5 6 ... 71 72

Summary of Contents

Page 1 - OL-13013-06

CHAPTER4-1Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-064Configuring Virtual Switching SystemsThis chapter describes how to configu

Page 2 - VSS Overview

4-10Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 3 - Key Concepts

4-11Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 4 - Virtual Switch Link

4-12Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 5 - Multichassis EtherChannel

4-13Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 6 - VSS Functionality

4-14Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 7 - Supervisor 1:

4-15Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 8 - Hardware Requirements

4-16Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 9 - VSL Hardware Requirements

4-17Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 10 - Service Module Support

4-18Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 11 - VSS Redundancy

4-19Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 12 - RPR and SSO Redundancy

4-2Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 13 - VSL Failure

4-20Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 14 - Multichassis EtherChannels

4-21Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 15 - MEC Failure Scenarios

4-22Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 16 - Packet Handling

4-23Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 17 - Layer 2 Protocols

4-24Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 18 - Layer 3 Protocols

4-25Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 19 - IPv4 Multicast

4-26Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchi

Page 20 - System Monitoring

4-27Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsVSS Configuration Guidelines

Page 21 - Service Modules

4-28Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsVSS Configuration Guidelines

Page 22 - Dual-Active Detection

4-29Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSS–exit –load-

Page 23

4-3Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 24 - VSS Initialization

4-30Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConverting t

Page 25 - SSO Dependencies

4-31Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSBacking Up t

Page 26 - Initialization Procedure

4-32Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSFor detailed

Page 27 - VSL Down

4-33Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConfiguring

Page 28

4-34Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSPerform the

Page 29 - Configuring a VSS

4-35Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSTo convert C

Page 30 - Converting to a VSS

4-36Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSDisplaying V

Page 31 - Configuring SSO and NSF

4-37Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSCopying the

Page 32

4-38Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConfiguring

Page 33

4-39Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSNote If you

Page 34

4-4Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 35

4-40Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConfiguring

Page 36 - Displaying VSS Information

4-41Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSS R -

Page 37

4-42Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSSubcommands

Page 38 - Configuring VSS Parameters

4-43Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConfiguring

Page 39 - Configuring PFC Mode

4-44Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSConfiguring

Page 40 - Displaying VSL Information

4-45Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSThe Configur

Page 41 - Configuring VSL QoS

4-46Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSNote Before

Page 42 - Subcommands for VSL Ports

4-47Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSRouter(confi

Page 43

4-48Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSRouter (conf

Page 44

4-49Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSWARNING: Int

Page 45

4-5Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 46

4-50Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSFast-hello d

Page 47

4-51Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSNote The sho

Page 48

4-52Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSAssigning a

Page 49

4-53Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsConfiguring a VSSVerifying In

Page 50

4-54Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSUpgrading a VS

Page 51

4-55Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSThis example s

Page 52

4-56Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSeFSU Restricti

Page 53

4-57Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSeFSU Stages fo

Page 54 - Upgrading a VSS

4-58Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSprevious softw

Page 55

4-59Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSChanging the e

Page 56

4-6Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 57 - Runversion Stage

4-60Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSFor an example

Page 58 - Abortversion (Optional)

4-61Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSIf you intend

Page 59 - Performing an eFSU Upgrade

4-62Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSIf the ICS is

Page 60

4-63Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSStep 4Router#

Page 61

4-64Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSPerforming an

Page 62

4-65Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSIf the ICS is

Page 63

4-66Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSFor an example

Page 64

4-67Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSS

Page 65

4-68Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSRP State = Act

Page 66 - Verify the System Readiness

4-69Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSVerify the New

Page 67

4-7Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 68

4-70Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSSCat6k-Sup720/R

Page 69

4-71Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSS keep_a

Page 70 - Verify the Switchover

4-72Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUpgrading a VSS

Page 71

4-8Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

Page 72

4-9Cisco IOS Software Configuration Guide, Release 12.2SXOL-13013-06Chapter 4 Configuring Virtual Switching SystemsUnderstanding Virtual Switchin

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