Cisco Nexus 3548 series User manual

Cisco Nexus 3548 Switch NX-OS Interfaces Configuration Guide,
Release 9x
First Published: 2018-07-16
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CONTENTS
Preface ix
PREFACE
Audience ix
Document Conventions ix
Documentation Feedback x
New and Changed Information 1
CHAPTER 1
New and Changed Information 1
Configuring Layer 2 Interfaces 3
CHAPTER 2
Information About Ethernet Interfaces 3
Interface Command 3
About 40-Gbps Interface Speed 4
Unidirectional Link Detection Parameter 4
Default UDLD Configuration 5
UDLD Aggressive and Nonaggressive Modes 5
SVI Autostate 5
Cisco Discovery Protocol 6
Default CDP Configuration 6
Error-Disabled State 7
MTU Configuration 7
Debounce Timer Parameters 8
Guidelines and Limitations for Layer 2 Interfaces 8
Configuring Ethernet Interfaces 8
Configuring the UDLD Mode 8
Configuring the Interface Speed 10
Configuring 40-Gigabit Interface Speed 11
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Disabling Link Negotiation 12
Disabling SVI Autostate 13
Configuring the CDP Characteristics 14
Enabling or Disabling CDP 15
Enabling the Error-Disabled Detection 16
Enabling the Error-Disabled Recovery 17
Configuring the Error-Disabled Recovery Interval 18
Configuring the Description Parameter 18
Disabling and Restarting Ethernet Interfaces 19
Configuring the Debounce Timer 20
Verifying the Layer 2 Interfaces Configuration 21
Displaying Interface Information 21
Default Physical Ethernet Settings 23
MIBs for Layer 2 Interfaces 24
Configuring Layer 3 Interfaces 25
CHAPTER 3
Information About Layer 3 Interfaces 25
Routed Interfaces 25
Subinterfaces 26
VLAN Interfaces 26
Loopback Interfaces 27
Licensing Requirements for Layer 3 Interfaces 27
Guidelines and Limitations for Layer 3 Interfaces 27
Default Settings for Layer 3 Interfaces 28
Configuring Layer 3 Interfaces 28
Configuring a Routed Interface 28
Configuring a Subinterface 29
Configuring the Bandwidth on an Interface 30
Configuring a VLAN Interface 31
Configuring a Loopback Interface 32
Assigning an Interface to a VRF 33
Verifying the Layer 3 Interfaces Configuration 34
Monitoring Layer 3 Interfaces 35
Configuration Examples for Layer 3 Interfaces 35
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Contents

Related Documents for Layer 3 Interfaces 36
MIBs for Layer 3 Interfaces 36
Standards for Layer 3 Interfaces 37
Configuring Port Channels 39
CHAPTER 4
Information About Port Channels 39
Understanding Port Channels 39
Compatibility Requirements 40
Load Balancing Using Port Channels 42
Understanding LACP 43
LACP Overview 43
LACP ID Parameters 44
Channel Modes 44
LACP Marker Responders 45
LACP-Enabled and Static Port Channel Differences 45
LACP Port Channel MinLinks 46
Configuring Port Channels 46
Creating a Port Channel 46
Adding a Port to a Port Channel 47
Configuring Load Balancing Using Port Channels 48
Enabling LACP 49
Configuring the Channel Mode for a Port 50
Configuring LACP Port Channel MinLinks 51
Configuring the LACP Fast Timer Rate 52
Configuring the LACP System Priority and System ID 53
Configuring the LACP Port Priority 53
Verifying Port Channel Configuration 54
Verifying the Load-Balancing Outgoing Port ID 55
Configuring Virtual Port Channels 57
CHAPTER 5
Information About vPCs 57
vPC Overview 57
Terminology 58
vPC Terminology 58
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vPC Domain 58
Peer-Keepalive Link and Messages 59
Compatibility Parameters for vPC Peer Links 60
Configuration Parameters That Must Be Identical 61
Configuration Parameters That Should Be Identical 62
Viewing Type-1 Inconsistency Check 62
Per-VLAN Consistency Check 63
vPC Auto-Recovery 63
vPC Peer Links 63
vPC Peer Link Overview 64
vPC Number 65
vPC Interactions with Other Features 65
vPC and LACP 65
vPC Peer Links and STP 65
CFSoE 66
vPC Peer Switch 66
Guidelines and Limitations for vPCs 67
Verifying the vPC Configuration 67
Viewing the Graceful Type-1 Check Status 68
Viewing a Global Type-1 Inconsistency 68
Viewing an Interface-Specific Type-1 Inconsistency 70
Viewing a Per-VLAN Consistency Status 71
vPC Default Settings 73
Configuring vPCs 73
Enabling vPCs 73
Disabling vPCs 74
Creating a vPC Domain 75
Configuring a vPC Keepalive Link and Messages 76
Creating a vPC Peer Link 79
Checking the Configuration Compatibility 80
Enabling vPC Auto-Recovery 81
Configuring the Restore Time Delay 82
Excluding VLAN Interfaces from Shutting Down a vPC Peer Link Fails 82
Configuring the VRF Name 83
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Moving Other Port Channels into a vPC 84
Manually Configuring a vPC Domain MAC Address 85
Manually Configuring the System Priority 86
Manually Configuring a vPC Peer Switch Role 87
Configuring Layer 3 over vPC 88
Configuring Static and Dynamic NAT Translation 91
CHAPTER 6
Network Address Translation Overview 91
Information About Static NAT 92
Dynamic NAT Overview 93
Timeout Mechanisms 94
NAT Inside and Outside Addresses 95
Pool Support for Dynamic NAT 95
Static and Dynamic Twice NAT Overview 96
Licensing Requirements for Static NAT 96
Guidelines and Limitations for Static NAT 97
Restrictions for Dynamic NAT 98
Guidelines and Limitations for Dynamic Twice NAT 98
Configuring Static NAT 99
Enabling Static NAT 99
Configuring Static NAT on an Interface 99
Enabling Static NAT for an Inside Source Address 100
Enabling Static NAT for an Outside Source Address 101
Configuring Static PAT for an Inside Source Address 102
Configuring Static PAT for an Outside Source Address 102
Configuring Static Twice NAT 103
Configuration Example for Static NAT and PAT 105
Example: Configuring Static Twice NAT 105
Verifying the Static NAT Configuration 106
Configuring Dynamic NAT 106
Configuring Dynamic Translation and Translation Timeouts 106
Configuring Dynamic NAT Pool 110
Configuring Source Lists 111
Configuring Dynamic Twice NAT for an Inside Source Address 112
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Configuring Dynamic Twice NAT for an Outside Source Address 113
Clearing Dynamic NAT Translations 114
Verifying Dynamic NAT Configuration 115
Verifying NAT Statistics 116
Clearing NAT Statistics 118
Example: Configuring Dynamic Translation and Translation Timeouts 118
Information About VRF Aware NAT 119
Configuring VRF Aware NAT 119
Configuring IP Event Dampening 121
CHAPTER 7
IP Event Dampening 121
IP Event Dampening Overview 121
Interface State Change Events 122
Suppress Threshold 122
Half-Life Period 122
Reuse Threshold 122
Maximum Suppress Time 122
Affected Components 123
Route Types 123
Supported Protocols 123
How to Configure IP Event Dampening 123
Enabling IP Event Dampening 123
Verifying IP Event Dampening 124
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Preface
The preface contains the following sections:
•Audience, on page ix
•Document Conventions, on page ix
•Documentation Feedback, on page x
Audience
This publication is for network administrators who configure and maintain Cisco Nexus devices.
Document Conventions
As part of our constant endeavor to remodel our documents to meet our customers' requirements, we have
modified the manner in which we document configuration tasks. As a result of this, you may find a deviation
in the style used to describe these tasks, with the newly included sections of the document following the new
format.
Note
Command descriptions use the following conventions:
DescriptionConvention
Bold text indicates the commands and keywords that you enter literally
as shown.
bold
Italic text indicates arguments for which the user supplies the values.
Italic
Square brackets enclose an optional element (keyword or argument).[x]
Square brackets enclosing keywords or arguments separated by a vertical
bar indicate an optional choice.
[x | y]
Braces enclosing keywords or arguments separated by a vertical bar
indicate a required choice.
{x | y}
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DescriptionConvention
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.
[x {y | z}]
Indicates a variable for which you supply values, in context where italics
cannot be used.
variable
A nonquoted set of characters. Do not use quotation marks around the
string or the string will include the quotation marks.
string
Examples use the following conventions:
DescriptionConvention
Terminal sessions and information the switch displays are in screen font.screen font
Information you must enter is in boldface screen font.boldface screen font
Arguments for which you supply values are in italic screen font.
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:
Means reader take note. Notes contain helpful suggestions or references to material not covered in the manual.
Note
Means reader be careful. In this situation, you might do something that could result in equipment damage or
loss of data.
Caution
Documentation Feedback
To provide technical feedback on this document, or to report an error or omission, please send your comments
to: .
We appreciate your feedback.
Cisco Nexus 3548 Switch NX-OS Interfaces Configuration Guide, Release 9x
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Preface
Documentation Feedback