Cisco Nexus 3548 series User manual

Cisco Nexus 3548 Switch NX-OS System Management Configuration
Guide, Release 6.x
First Published: 2013-05-13
Last Modified: 2016-05-31
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CONTENTS
Preface Preface xiii
Audience xiii
Document Conventions xiii
Documentation Feedback xv
CHAPTER 1 New and Changed Information 1
New and Changed Information in this Release 1
CHAPTER 2 Overview 3
System Management Features 3
CHAPTER 3 Configuring PTP 7
Information About PTP 7
PTP Device Types 8
PTP Process 9
High Availability for PTP 10
Licensing Requirements for PTP 10
Guidelines and Limitations for PTP 10
Default Settings for PTP 10
Configuring PTP 11
Configuring PTP Globally 11
Configuring PTP on an Interface 13
Configuring Multiple PTP Domains 14
Configuring PTP Grandmaster Clock 16
Configuring PTP Cost Interface 18
Configuring clock Identity 18
Verifying the PTP Configuration 19
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CHAPTER 4 Configuring User Accounts and RBAC 21
Information About User Accounts and RBAC 21
User Roles 21
Rules 22
User Role Policies 22
User Account Configuration Restrictions 23
User Password Requirements 24
Guidelines and Limitations for User Accounts 24
Configuring User Accounts 25
Configuring RBAC 26
Creating User Roles and Rules 26
Creating Feature Groups 27
Changing User Role Interface Policies 28
Changing User Role VLAN Policies 28
Verifying the User Accounts and RBAC Configuration 29
Configuring User Accounts Default Settings for the User Accounts and RBAC 30
CHAPTER 5 Configuring Session Manager 31
Information About Session Manager 31
Guidelines and Limitations for Session Manager 31
Configuring Session Manager 32
Creating a Session 32
Configuring ACLs in a Session 32
Verifying a Session 33
Committing a Session 33
Saving a Session 33
Discarding a Session 33
Configuration Example for Session Manager 34
Verifying the Session Manager Configuration 34
CHAPTER 6 Configuring the Scheduler 35
Information About the Scheduler 35
Remote User Authentication 36
Scheduler Log Files 36
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Licensing Requirements for the Scheduler 36
Guidelines and Limitations for the Scheduler 36
Default Settings for the Scheduler 37
Configuring the Scheduler 37
Enabling the Scheduler 37
Defining the Scheduler Log File Size 38
Configuring Remote User Authentication 38
Defining a Job 39
Deleting a Job 40
Defining a Timetable 40
Clearing the Scheduler Log File 42
Disabling the Scheduler 42
Verifying the Scheduler Configuration 43
Configuration Examples for the Scheduler 43
Creating a Scheduler Job 43
Scheduling a Scheduler Job 44
Displaying the Job Schedule 44
Displaying the Results of Running Scheduler Jobs 44
Standards for the Scheduler 45
CHAPTER 7 Configuring Online Diagnostics 47
Information About Online Diagnostics 47
Bootup Diagnostics 47
Health Monitoring Diagnostics 48
Expansion Module Diagnostics 49
Configuring Online Diagnostics 50
Verifying the Online Diagnostics Configuration 50
Default Settings for Online Diagnostics 51
CHAPTER 8 Configuring NTP 53
Information About NTP 53
NTP as a Time Server 54
Distributing NTP Using CFS 54
Clock Manager 54
Virtualization Support 54
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Licensing Requirements for NTP 54
Guidelines and Limitations for NTP 55
Default Settings 55
Configuring NTP 56
Configuring NTP Server and Peer 56
Configuring NTP Authentication 57
Configuring NTP Access Restrictions 59
Configuring the NTP Source IP Address 60
Configuring the NTP Source Interface 60
Configuring NTP Logging 60
Enabling CFS Distribution for NTP 61
Commiting NTP Configuration Changes 62
Discarding NTP Configuration Changes 62
Releasing the CFS Session Lock 63
Verifying the NTP Configuration 63
Configuration Examples for NTP 64
Related Documents for NTP 65
Feature History for NTP 65
CHAPTER 9 Configuring System Message Logging 67
Information About System Message Logging 67
Syslog Servers 68
Licensing Requirements for System Message Logging 68
Guidelines and Limitations for System Message Logging 69
Default Settings for System Message Logging 69
Configuring System Message Logging 69
Configuring System Message Logging to Terminal Sessions 69
Configuring System Message Logging to a File 71
Configuring Module and Facility Messages Logging 73
Configuring Logging Timestamps 74
Configuring Syslog Servers 75
Configuring syslog on a UNIX or Linux System 76
Configuring syslog Server Configuration Distribution 77
Displaying and Clearing Log Files 78
Configuring DOM Logging 79
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Enabling DOM Logging 79
Disabling DOM Logging 80
Verifying the DOM Logging Configuration 80
Verifying the System Message Logging Configuration 80
CHAPTER 10 Configuring Smart Call Home 83
Information About Smart Call Home 83
Smart Call Home Overview 84
Smart Call Home Destination Profiles 84
Smart Call Home Alert Groups 85
Smart Call Home Message Levels 86
Call Home Message Formats 87
Guidelines and Limitations for Smart Call Home 92
Prerequisites for Smart Call Home 92
Default Call Home Settings 93
Configuring Smart Call Home 93
Registering for Smart Call Home 93
Configuring Contact Information 94
Creating a Destination Profile 95
Modifying a Destination Profile 96
Associating an Alert Group with a Destination Profile 98
Adding Show Commands to an Alert Group 98
Configuring E-Mail Server Details 99
Configuring Periodic Inventory Notifications 100
Disabling Duplicate Message Throttling 101
Enabling or Disabling Smart Call Home 102
Testing the Smart Call Home Configuration 102
Verifying the Smart Call Home Configuration 103
Sample Syslog Alert Notification in Full-Text Format 104
Sample Syslog Alert Notification in XML Format 104
CHAPTER 11 Configuring Rollback 109
Information About Rollbacks 109
Guidelines and Limitations for Rollbacks 109
Creating a Checkpoint 110
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Implementing a Rollback 111
Verifying the Rollback Configuration 111
CHAPTER 12 Configuring DNS 113
Information About DNS Client 113
Name Servers 113
DNS Operation 114
High Availability 114
Prerequisites for DNS Clients 114
Licensing Requirements for DNS Clients 114
Default Settings for DNS Clients 114
Configuring DNS Clients 115
CHAPTER 13 Configuring SNMP 117
Information About SNMP 117
SNMP Functional Overview 117
SNMP Notifications 118
SNMPv3 118
Security Models and Levels for SNMPv1, v2, and v3 118
User-Based Security Model 120
CLI and SNMP User Synchronization 120
Group-Based SNMP Access 121
Licensing Requirements for SNMP 121
Guidelines and Limitations for SNMP 121
Default SNMP Settings 122
Configuring SNMP 122
Configuring SNMP Users 122
Enforcing SNMP Message Encryption 123
Assigning SNMPv3 Users to Multiple Roles 123
Creating SNMP Communities 124
Filtering SNMP Requests 124
Configuring SNMP Notification Receivers 124
Configuring SNMP Notification Receivers with VRFs 126
Filtering SNMP Notifications Based on a VRF 126
Configuring SNMP for Inband Access 127
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Enabling SNMP Notifications 128
Configuring Link Notifications 130
Disabling Link Notifications on an Interface 131
Enabling One-Time Authentication for SNMP over TCP 131
Assigning SNMP Switch Contact and Location Information 131
Configuring the Context to Network Entity Mapping 132
Disabling SNMP 133
Verifying the SNMP Configuration 133
CHAPTER 14 Configuring RMON 135
Information About RMON 135
RMON Alarms 135
RMON Events 136
Configuration Guidelines and Limitations for RMON 136
Configuring RMON 137
Configuring RMON Alarms 137
Configuring RMON Events 138
Verifying the RMON Configuration 138
Default RMON Settings 139
CHAPTER 15 Configuring SPAN 141
Information About SPAN 142
SPAN Sources 142
Characteristics of Source Ports 142
SPAN Destinations 143
Characteristics of Destination Ports 143
SPAN and ERSPAN Filtering 143
Guidelines and Limitations for SPAN and ERSPAN Filtering 143
SPAN and ERSPAN Sampling 144
Guidelines and Limitations for SPAN and ERSPAN Sampling 145
SPAN and ERSPAN Truncation 145
Guidelines and Limitations for SPAN and ERSPAN Truncation 145
Creating or Deleting a SPAN Session 145
Configuring an Ethernet Destination Port 146
Configuring Source Ports 147
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Configuring Source Port Channels or VLANs 147
Configuring the Description of a SPAN Session 148
Activating a SPAN Session 149
Suspending a SPAN Session 149
Configuring a SPAN Filter 149
Configuring SPAN Sampling 150
Configuring SPAN Truncation 152
Displaying SPAN Information 153
CHAPTER 16 Configuring Warp SPAN 155
Information About Warp SPAN 155
Guidelines and Limitations for Warp Span 156
Configuring Warp SPAN 157
Verifying Warp SPAN Mode Configuration 157
Feature History for Warp SPAN 158
CHAPTER 17 Configuring ERSPAN 159
Information About ERSPAN 159
ERSPAN Types 159
ERSPAN Sources 160
ERSPAN Destinations 160
ERSPAN Sessions 160
Multiple ERSPAN Sessions 161
ERSPAN Marker Packet 161
High Availability 161
Licensing Requirements for ERSPAN 161
Prerequisites for ERSPAN 162
Guidelines and Limitations for ERSPAN 162
Default Settings for ERSPAN 164
Configuring ERSPAN 164
Configuring an ERSPAN Source Session 164
Configuring an ERSPAN Destination Session 166
Shutting Down or Activating an ERSPAN Session 169
Configuring ERSPAN Filtering 171
Configuring ERSPAN Sampling 172
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Configuring ERSPAN Truncation 174
Configuring an ERSPAN Marker Packet 175
Verifying the ERSPAN Configuration 176
Configuration Examples for ERSPAN 176
Configuration Example for an ERSPAN Source Session 176
Configuration Example for an ERSPAN Destination Session 176
Additional References 177
Related Documents 177
CHAPTER 18 Performing Software Maintenance Upgrades (SMUs) 179
About SMUs 179
Package Management 180
Prerequisites for SMUs 180
Guidelines and Limitations for SMUs 181
Performing a Software Maintenance Upgrade for Cisco NX-OS 181
Preparing for Package Installation 181
Copying the Package File to a Local Storage Device or Network Server 182
Adding and Activating Packages 183
Committing the Active Package Set 184
Deactivating and Removing Packages 185
Displaying Installation Log Information 186
CHAPTER 19 Configuring Active Buffer Monitoring 187
Information About Active Buffer Monitoring 187
Active Buffer Monitoring Overview 187
Buffer Histogram Data Access and Collection 188
Configuring Active Buffer Monitoring 188
Displaying Buffer Histogram Data 189
CHAPTER 20 Configuring Traffic Forwarding Modes 195
Information About Warp Mode 195
Guidelines and Limitations for Warp Mode 195
Enabling and Disabling Warp Mode 196
Verifying Warp Mode Status 196
Feature History for Warp Mode 197
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Contents

Preface
The preface contains the following sections:
•Audience, page xiii
•Document Conventions, page xiii
•Documentation Feedback, page xv
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]
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DescriptionConvention
Braces enclosing keywords or arguments separated by a vertical bar
indicate a required choice.
{x | y}
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
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Preface
Document Conventions

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.
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Preface
Documentation Feedback

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Preface
Documentation Feedback

CHAPTER 1
New and Changed Information
This chapter contains the following sections:
•New and Changed Information in this Release, page 1
New and Changed Information in this Release
The following table provides an overview of the significant changes made to this configuration guide. The
table does not provide an exhaustive list of all changes made to this guide or all new features in a particular
release.
Table 1: New and Changed Features
Where DocumentedAdded or
Changed
in
Release
DescriptionFeature
Configuring Multiple
PTP Domains, on
page 14
Configuring PTP
Grandmaster Clock,
on page 16
Configuring PTP Cost
Interface, on page 18
Configuring clock
Identity, on page 18
6.0(2)A8(3)Added support for configuring PTP on multiple
domains, grandmaster capability, PTP cost on
interfaces and clock identity.
PTP Enhancements
Enabling DOM
Logging, on page 79
6.0(2)A8(1)Added support for DOM logging.DOM logging
About SMUs, on page
179
6.0(2)A7(2)Added support for performing Software
Maintenance Upgrades (SMUs).
Software Maintenance
Upgrades (SMUs)
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Where DocumentedAdded or
Changed
in
Release
DescriptionFeature
Guidelines and
Limitations for SPAN
and ERSPAN
Filtering, on page 143
6.0(2)A4(1)Added guideline about SPAN threshold and the
hardware profile buffer span-threshold <xx>
CLI command.
SPAN guidelines
SPAN and ERSPAN
Filtering, on page 143
SPAN and ERSPAN
Sampling, on page
144
SPAN and ERSPAN
Truncation, on page
145
6.0(2)A4(1)Added the ability to filter, sample and truncate
packets for these features.
SPAN and ERSPAN
ERSPAN Marker
Packet, on page 161
6.0(2)A4(1)Introduced a periodical marker packet to carry
the original UTC timestamp information and
provide a reference for the ERSPAN timestamp.
ERSPAN Marker
Packet
Configuring
ERSPAN, on page
159
6.0(2)A1(1)This feature was introduced.Configuring ERSPAN
Configuring PTP, on
page 7
6.0(2)A1(1)This feature was introduced.Configuring PTP
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New and Changed Information
New and Changed Information in this Release

CHAPTER 2
Overview
This chapter contains the following sections:
•System Management Features, page 3
System Management Features
The system management features documented in this guide are described below:
DescriptionFeature
The Active Buffer Monitoring feature provides
detailed buffer occupancy data to help you detect
network congestion, review past events to understand
when and how network congestion is affecting
network operations, understand historical trending,
and identify patterns of application traffic flow.
Active Buffer Monitoring
In warp mode, the access path is shortened by
consolidating the forwarding table into single table,
resulting in faster processing of frames and packets.
In warp mode, latency is reduced by up to 20 percent.
Warp Mode
User accounts and role-based access control (RBAC)
allow you to define the rules for an assigned role.
Roles restrict the authorization that the user has to
access management operations. Each user role can
contain multiple rules and each user can have multiple
roles.
User Accounts and RBAC
Session Manager allows you to create a configuration
and apply it in batch mode after the configuration is
reviewed and verified for accuracy and completeness.
Session Manager
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DescriptionFeature
Cisco Generic Online Diagnostics (GOLD) define a
common framework for diagnostic operations across
Cisco platforms. The online diagnostic framework
specifies the platform-independent fault-detection
architecture for centralized and distributed systems,
including the common diagnostics CLI and the
platform-independent fault-detection procedures for
boot-up and run-time diagnostics.
The platform-specific diagnostics provide
hardware-specific fault-detection tests and allow you
to take appropriate corrective action in response to
diagnostic test results.
Online Diagnostics
You can use system message logging to control the
destination and to filter the severity level of messages
that system processes generate. You can configure
logging to a terminal session, a log file, and syslog
servers on remote systems.
System message logging is based on RFC 3164. For
more information about the system message format
and the messages that the device generates, see the
Cisco NX-OS System Messages Reference.
System Message Logging
Call Home provides an e-mail-based notification of
critical system policies. Cisco NX-OS provides a
range of message formats for optimal compatibility
with pager services, standard e-mail, or XML-based
automated parsing applications. You can use this
feature to page a network support engineer, e-mail a
Network Operations Center, or use Cisco Smart Call
Home services to automatically generate a case with
the Technical Assistance Center.
Smart Call Home
The configuration rollback feature allows users to
take a snapshot, or user checkpoint, of the Cisco
NX-OS configuration and then reapply that
configuration to a switch at any point without having
to reload the switch. A rollback allows any authorized
administrator to apply this checkpoint configuration
without requiring expert knowledge of the features
configured in the checkpoint.
Configuration Rollback
The Simple Network Management Protocol (SNMP)
is an application-layer protocol that provides a
message format for communication between SNMP
managers and agents. SNMP provides a standardized
framework and a common language used for the
monitoring and management of devices in a network.
SNMP
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Overview
System Management Features