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Cisco Nexus 5000 Series NX-OSInterfaces Configuration Guide,

Release 5.2(1)N1(1)

First Published: July 02, 2012

Last Modified: July 02, 2012

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800 553-NETS(6387) Fax: 408527-0883

Text Part Number: 78-26881-OL

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Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: http:// www.cisco.com/go/trademarks.Third-partytrademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

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© 2012 Cisco Systems, Inc. All rights reserved.

C O N T E N T S

P r e f a c e

Preface ix

Audience ix

Document Conventions ix

Documentation Feedback x

C H A P T E R 1

C H A P T E R 2

Obtaining Documentation and Submitting a Service Request xi

New and Changed Information for this Release 1

New and Changed Information for this Release 1

 

 

Configuring Layer 2 Interfaces 3

 

 

 

 

Information About Ethernet Interfaces

3

 

 

About the Interface Command 3

 

 

 

Information About Unified Ports 4

 

 

 

Guidelines and Limitations for Unified Ports

4

 

About the Unidirectional Link Detection Parameter

5

Default UDLD Configuration

5

 

 

UDLD Aggressive and Nonaggressive Modes

6

Interface Speed 6

 

 

 

 

About the Cisco Discovery Protocol

6

 

 

Default CDP Configuration

7

 

 

 

About the Error-DisabledState

7

 

 

 

About Port Profiles 8

 

 

 

 

Guidelines and Limitations for Port Profiles

9

 

About the Debounce Timer Parameters 9

 

 

About MTU Configuration 9

Configuring Ethernet Interfaces 10

Configuring a Layer 3 Interface on a Cisco Nexus 5500 Platform Switch 10

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C H A P T E R 3

Configuring Unified Ports 10

 

 

 

Configuring the UDLD Mode 12

 

 

 

Configuring Interface Speed

13

 

 

 

Disabling Link Negotiation

14

 

 

 

Configuring the CDP Characteristics 14

 

Enabling or Disabling CDP

15

 

 

 

Enabling the Error-DisabledDetection

16

 

Enabling the Error-DisabledRecovery

17

 

Configuring the Error-DisabledRecovery Interval18

Port Profiles 19

 

 

 

 

 

Creating a Port Profile

19

 

 

 

Modifying a Port Profile 20

 

 

 

Enabling a Specific Port Profile 21

 

 

Inheriting a Port Profile

22

 

 

 

Removing an Inherited Port Profile

23

 

Assigning a Port Profile to a Range of Interfaces 24

Removing a Port Profile from a Range of Interfaces 25

Configuration Examples for Port Profiles 26

Configuring the Debounce Timer

27

 

 

Configuring the Description Parameter

28

 

Disabling and Restarting Ethernet Interfaces

28

Displaying Interface Information 29

 

 

Default Physical Ethernet Settings

31

 

 

Configuring Layer 3 Interfaces 33

 

 

 

 

Information About Layer 3 Interfaces 33

 

 

Routed Interfaces

33

 

 

 

 

Subinterfaces 34

 

 

 

 

 

VLAN Interfaces

35

 

 

 

 

Loopback Interfaces 35

 

 

 

 

Tunnel Interfaces

36

 

 

 

 

Licensing Requirements for Layer 3 Interfaces

36

Guidelines and Limitations for Layer 3 Interfaces 36

Default Settings for Layer 3 Interfaces 36

 

 

Configuring Layer 3 Interfaces

36

 

 

 

 

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Configuring a Routed Interface 36

 

Configuring a Subinterface 37

 

Configuring the Bandwidth on an Interface

38

Configuring a VLAN Interface 39

 

Configuring a Loopback Interface 40

 

Assigning an Interface to a VRF 40

 

Verifying the Layer 3 Interfaces Configuration

41

Monitoring Layer 3 Interfaces 42

 

Configuration Examples for Layer 3 Interfaces

43

Related Documents for Layer 3 Interfaces 44

 

MIBs for Layer 3 Interfaces 44

Standards for Layer 3 Interfaces 44

C H A P T E R 4

Configuring Port Channels 45

Information About Port Channels 45

Understanding Port Channels 45

Guidelines and Limitations for Port Channel Configuration 46

Compatibility Requirements 47

Load Balancing Using Port Channels 48

Understanding LACP 51

LACP Overview 51

LACP ID Parameters 52

Channel Modes 52

LACP Marker Responders 53

LACP-Enabled and Static Port Channel Differences 54

Configuring Port Channels 54

Creating a Port Channel 54

Adding a Port to a Port Channel 55

Configuring Load Balancing Using Port Channels 55

Configuring Hardware Hashing for Multicast Traffic 57

Enabling LACP 57

Configuring the Channel Mode for a Port 58

Configuring the LACP Fast Timer Rate 59

Configuring the LACP System Priority and System ID 60

Configuring the LACP Port Priority 60

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Disabling LACP Graceful Convergence 61

Reenabling LACP Graceful Convergence 62

Verifying Port Channel Configuration 63

Verifying the Load-Balancing Outgoing Port ID 64

C H A P T E R 5

Configuring Virtual Port Channels 65

Information About vPCs 65

vPC Overview 65

Terminology 67

vPC Terminology 67

Fabric Extender Terminology 67

Supported vPC Topologies 68

Cisco Nexus 5000 Series Switch vPC Topology 68

Single Homed Fabric Extender vPC Topology 69

Dual Homed Fabric Extender vPC Topology 70

vPC Domain 70

Peer-Keepalive Link and Messages 71

Compatibility Parameters for vPC Peer Links 71

Configuration Parameters That Must Be Identical 71

Configuration Parameters That Should Be Identical 73

Graceful Type-1 Check 73

Per-VLAN Consistency Check 74

vPC Auto-Recovery 74

vPC Peer Links 74

vPC Peer Link Overview 74

vPC Number 75

vPC Interactions with Other Features 76

Configuring vPC Peer Links and Links to the Core 76 vPC and LACP 77

vPC Peer Links and STP 77

vPC and ARP 78

CFSoE 78

vPC Peer Switch 79

Guidelines and Limitations for vPCs 79

Configuring vPCs 80

 

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Enabling vPCs 80

Disabling vPCs 80

Creating a vPC Domain 81

Configuring a vPC Keepalive Link and Messages 82

Creating a vPC Peer Link 84

Checking the Configuration Compatibility 85

Enabling vPC Auto-Recovery 86

Suspending Orphan Ports on a Secondary Switch in a vPC Topology 87

Creating an EtherChannel Host Interface 88

Moving Other Port Channels into a vPC 89

Manually Configuring a vPC Domain MAC Address 90

Manually Configuring the System Priority 91

Manually Configuring a vPC Peer Switch Role 92

Configuring the vPC Peer Switch 93

Configuring a Pure vPC Peer Switch Topology 93

Configuring a Hybrid vPC Peer Switch Topology 94

Verifying the vPC Configuration 95

Viewing The Graceful Type-1 Check Status 96

Viewing A Global Type-1 Inconsistency 97

Viewing An Interface-Specific Type-1 Inconsistency 98

Viewing a Per-VLAN Consistency Status 99

vPC Example Configurations 101

Dual Homed Fabric Extender vPC Configuration Example 101

Single Homed Fabric Extender vPC Configuration Example 103

vPC Default Settings 105

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Preface

This preface contains the following sections:

Audience, page ix

Document Conventions, page ix

Documentation Feedback , page x

Obtaining Documentation and Submitting a Service Request, page xi

Audience

This publication is for experienced network administrators who configure and maintain Cisco Nexus devices and Cisco Nexus 2000 Series Fabric Extenders.

Document Conventions

Command descriptions use the following conventions:

Convention

Description

bold

Bold text indicates the commands and keywords that you enter literally

 

as shown.

Italic

Italic text indicates arguments for which the user supplies the values.

[x]

Square brackets enclose an optional element(keyword or argument).

[x | y]

Squarebracketsenclosingkeywordsorargumentsseparatedbyavertical

 

bar indicate an optional choice.

{x | y}

Braces enclosing keywords or arguments separated by a vertical bar

 

indicate a required choice.

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Documentation Feedback

Convention

Description

[x {y | z}]

Nested set of square brackets or braces indicate optional or required

 

choices within optional or required elements. Braces and a vertical bar

 

within square brackets indicate a required choice within an optional

 

element.

variable

Indicatesavariableforwhichyousupplyvalues,incontextwhereitalics

 

cannot be used.

string

A nonquoted set of characters. Do not use quotation marks around the

 

string or the string will include the quotation marks.

Examples use the following conventions:

Convention

Description

screen font

Terminalsessionsandinformationtheswitchdisplaysareinscreenfont.

boldface screen font

Information you must enter is in boldface screen font.

italic screen font

Arguments for which you supply values are in italic screen font.

< >

Nonprinting characters, such as passwords, are in angle brackets.

[ ]

Default responses to system prompts are in square brackets.

!, #

An exclamation point (!) or a pound sign (#) at the beginning of a line

 

of code indicates a comment line.

This document uses the following conventions:

Note Meansreader take note. Notes contain helpful suggestions or references to material not covered in the manual.

Caution Meansreader be careful. Inthissituation,youmightdosomethingthatcouldresultinequipmentdamage or loss of data.

Documentation Feedback

Toprovidetechnicalfeedbackonthisdocument,ortoreportanerrororomission,pleasesendyourcomments to nexus5k-docfeedback@cisco.com .We appreciate your feedback.

 

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Preface

Obtaining Documentation and Submitting a Service Request

Obtaining Documentation and Submitting a Service Request

Forinformationonobtainingdocumentation,submittingaservicerequest,andgatheringadditionalinformation, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

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Obtaining Documentation and Submitting a Service Request

 

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