Dell N4000 Series User manual

Dell Networking
N2000, N3000, and N4000
Series Switches
User’s Configuration
Guide
Regulatory Models: N2024, N2024P,
N2038,N2048P, N3024, N3024F, N3024P,
N3048, N3048P, N4032, N4032F, N4064,
N4064F

Notes and Cautions
NOTE: A NOTE indicates important information that helps you make better use of
your computer.
CAUTION: A CAUTION indicates potential damage to hardware or loss of data if
instructions are not followed.
____________
Information in this publication is subject to change without notice.
© 2014 Dell Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc.
is strictly forbidden.
Trademarks used in this text: Dell™, the DELL logo, EqualLogic™, and OpenManage™ are
trademarks of Dell Inc. Microsoft®, Windows®, Windows Server®, MS-DOS®, and Windows Vista®
are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or
other countries. sFlow®is a registered trademark of InMon Corporation. Cisco®is a registered
trademark of Cisco Systems. Mozilla®and Firefox®are registered trademarks of the Mozilla
Foundation.
Other trademarks and trade names may be used in this publication to refer to either the entities claiming
the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and
trade names other than its own.
Regulatory Models: N2024, N2024P, N2038,N2048P, N3024, N3024F, N3024P, N3048, N3048P, N4032, N4032F, N4064, N4064F
January 2014 Rev. A01

Contents 3
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . 51
About This Document . . . . . . . . . . . . . . . . . . 51
Audience . . . . . . . . . . . . . . . . . . . . . . . . . 52
Document Conventions . . . . . . . . . . . . . . . . . 52
Additional Documentation. . . . . . . . . . . . . . . . 53
2 Switch Feature Overview . . . . . . . . . . . . 55
System Management Features . . . . . . . . . . . . . 56
Multiple Management Options . . . . . . . . . . . 56
System Time Management . . . . . . . . . . . . . 56
Log Messages . . . . . . . . . . . . . . . . . . . 57
Integrated DHCP Server . . . . . . . . . . . . . . 57
Management of Basic Network Information. . . . 57
IPv6 Management Features . . . . . . . . . . . . 58
Dual Software Images . . . . . . . . . . . . . . . 58
File Management . . . . . . . . . . . . . . . . . . 58
Switch Database Management Templates. . . . . 58
Automatic Installation of Firmware and
Configuration . . . . . . . . . . . . . . . . . . . . 59
sFlow . . . . . . . . . . . . . . . . . . . . . . . . 59
SNMP Alarms and Trap Logs . . . . . . . . . . . . 60
CDP Interoperability through ISDP . . . . . . . . . 60
Remote Monitoring (RMON) . . . . . . . . . . . . 60
Stacking Features . . . . . . . . . . . . . . . . . . . . 61
High Stack Count . . . . . . . . . . . . . . . . . . 61

4Contents
Single IP Management . . . . . . . . . . . . . . . 61
Master Failover with Transparent Transition . . . . 62
Nonstop Forwarding on the Stack . . . . . . . . . 62
Hot Add/Delete and Firmware
Synchronization . . . . . . . . . . . . . . . . . . . 62
Security Features . . . . . . . . . . . . . . . . . . . . 63
Configurable Access and Authentication
Profiles . . . . . . . . . . . . . . . . . . . . . . . 63
Password-Protected Management Access . . . . 63
Strong Password Enforcement . . . . . . . . . . . 63
TACACS+ Client . . . . . . . . . . . . . . . . . . . 63
RADIUS Support . . . . . . . . . . . . . . . . . . 64
SSH/SSL. . . . . . . . . . . . . . . . . . . . . . . 64
Inbound Telnet Control . . . . . . . . . . . . . . . 64
Denial of Service . . . . . . . . . . . . . . . . . . 64
Port Protection . . . . . . . . . . . . . . . . . . . 64
Captive Portal . . . . . . . . . . . . . . . . . . . . 65
Dot1x Authentication (IEEE 802.1X) . . . . . . . . . 66
MAC-Based 802.1X Authentication . . . . . . . . . 66
Dot1x Monitor Mode . . . . . . . . . . . . . . . . 66
MAC-Based Port Security . . . . . . . . . . . . . 66
Access Control Lists (ACL) . . . . . . . . . . . . . 67
Time-Based ACLs . . . . . . . . . . . . . . . . . . 67
IP Source Guard (IPSG). . . . . . . . . . . . . . . 67
DHCP Snooping . . . . . . . . . . . . . . . . . . . 68
Dynamic ARP Inspection . . . . . . . . . . . . . . 68
Protected Ports (Private VLAN Edge). . . . . . . . 68
Green Technology Features . . . . . . . . . . . . . . . 69
Energy Detect Mode . . . . . . . . . . . . . . . . 69
Energy Efficient Ethernet . . . . . . . . . . . . . . 69
Power Utilization Reporting. . . . . . . . . . . . . 69

Contents 5
Power over Ethernet (PoE) Plus Features . . . . . . . . 70
Power Over Ethernet (PoE) Plus
Configuration . . . . . . . . . . . . . . . . . . . . 70
PoE Plus Support . . . . . . . . . . . . . . . . . . 70
Switching Features . . . . . . . . . . . . . . . . . . . 71
Flow Control Support (IEEE 802.3x) . . . . . . . . . 71
Head of Line Blocking Prevention . . . . . . . . . 71
Alternate Store and Forward (ASF). . . . . . . . . 71
Jumbo Frames Support . . . . . . . . . . . . . . . 71
Auto-MDI/MDIX Support . . . . . . . . . . . . . . 72
VLAN-Aware MAC-based Switching. . . . . . . . 72
Back Pressure Support . . . . . . . . . . . . . . . 72
Auto Negotiation . . . . . . . . . . . . . . . . . . 72
Broadcast Storm Control . . . . . . . . . . . . . . 73
Port Mirroring. . . . . . . . . . . . . . . . . . . . 73
Static and Dynamic MAC Address Tables . . . . . 73
Link Layer Discovery Protocol (LLDP) . . . . . . . 74
Link Layer Discovery Protocol (LLDP) for
Media Endpoint Devices . . . . . . . . . . . . . . 74
Connectivity Fault Management
(IEEE 802.1ag) . . . . . . . . . . . . . . . . . . . . 74
Priority-based Flow Control (PFC) . . . . . . . . . 74
Data Center Bridging Exchange (DBCx)
Protocol . . . . . . . . . . . . . . . . . . . . . . . 75
Enhanced Transmission Selection . . . . . . . . . 75
Cisco Protocol Filtering. . . . . . . . . . . . . . . 76
DHCP Layer 2 Relay. . . . . . . . . . . . . . . . . 76
Virtual Local Area Network Supported Features . . . . 77
VLAN Support. . . . . . . . . . . . . . . . . . . . 77
Port-Based VLANs . . . . . . . . . . . . . . . . . 77
IP Subnet-based VLAN . . . . . . . . . . . . . . . 77
MAC-based VLAN . . . . . . . . . . . . . . . . . 77
IEEE 802.1v Protocol-Based VLANs . . . . . . . . 77

6Contents
GARP and GVRP Support . . . . . . . . . . . . . . 78
Voice VLAN . . . . . . . . . . . . . . . . . . . . . 78
Guest VLAN . . . . . . . . . . . . . . . . . . . . . 78
Double VLANs. . . . . . . . . . . . . . . . . . . . 78
Spanning Tree Protocol Features . . . . . . . . . . . . 79
Spanning Tree Protocol (STP) . . . . . . . . . . . 79
Spanning Tree Port Settings . . . . . . . . . . . . 79
Rapid Spanning Tree . . . . . . . . . . . . . . . . 79
Multiple Spanning Tree . . . . . . . . . . . . . . . 79
Bridge Protocol Data Unit (BPDU) Guard. . . . . . 80
BPDU Filtering . . . . . . . . . . . . . . . . . . . 80
RSTP-PV and STP-PV . . . . . . . . . . . . . . . . 80
Link Aggregation Features . . . . . . . . . . . . . . . . 81
Link Aggregation . . . . . . . . . . . . . . . . . . 81
Link Aggregate Control Protocol (LACP) . . . . . . 81
Multi-Switch LAG (MLAG) . . . . . . . . . . . . . 81
Routing Features . . . . . . . . . . . . . . . . . . . . . 82
Address Resolution Protocol (ARP) Table
Management . . . . . . . . . . . . . . . . . . . . 82
VLAN Routing . . . . . . . . . . . . . . . . . . . . 82
IP Configuration . . . . . . . . . . . . . . . . . . . 82
Open Shortest Path First (OSPF) . . . . . . . . . . 82
BOOTP/DHCP Relay Agent . . . . . . . . . . . . . 83
IP Helper and UDP Relay . . . . . . . . . . . . . . 83
Routing Information Protocol . . . . . . . . . . . . 83
Router Discovery . . . . . . . . . . . . . . . . . . 83
Routing Table . . . . . . . . . . . . . . . . . . . . 83
Virtual Router Redundancy Protocol (VRRP) . . . . 84
Tunnel and Loopback Interfaces . . . . . . . . . . 84
IPv6 Routing Features . . . . . . . . . . . . . . . . . . 85
IPv6 Configuration . . . . . . . . . . . . . . . . . 85

Contents 7
IPv6 Routes . . . . . . . . . . . . . . . . . . . . . 85
OSPFv3 . . . . . . . . . . . . . . . . . . . . . . . 85
DHCPv6 . . . . . . . . . . . . . . . . . . . . . . . 85
Quality of Service (QoS) Features . . . . . . . . . . . . 86
Differentiated Services (DiffServ) . . . . . . . . . 86
Class Of Service (CoS) . . . . . . . . . . . . . . . 86
Auto Voice over IP (VoIP). . . . . . . . . . . . . . 86
Internet Small Computer System Interface
(iSCSI) Optimization. . . . . . . . . . . . . . . . . 87
Layer 2 Multicast Features . . . . . . . . . . . . . . . 87
MAC Multicast Support. . . . . . . . . . . . . . . 87
IGMP Snooping . . . . . . . . . . . . . . . . . . . 87
IGMP Snooping Querier . . . . . . . . . . . . . . 88
MLD Snooping . . . . . . . . . . . . . . . . . . . 88
Multicast VLAN Registration . . . . . . . . . . . . 88
Layer 3 Multicast Features . . . . . . . . . . . . . . . 89
Distance Vector Multicast Routing Protocol . . . . 89
Internet Group Management Protocol . . . . . . . 89
IGMP Proxy . . . . . . . . . . . . . . . . . . . . . 89
Protocol Independent Multicast—
Dense Mode . . . . . . . . . . . . . . . . . . . . 89
Protocol Independent Multicast—
Sparse Mode . . . . . . . . . . . . . . . . . . . . 90
Protocol Independent Multicast—
Source Specific Multicast . . . . . . . . . . . . . 90
Protocol Independent Multicast IPv6 Support . . . 90
MLD/MLDv2 (RFC2710/RFC3810) . . . . . . . . . . 90
3 Hardware Overview. . . . . . . . . . . . . . . . . 91
Dell Networking N2000 Series Switch Hardware . . . 91
N2000 Series Front Panel . . . . . . . . . . . . . . 91

8Contents
N2000 Series Back Panel . . . . . . . . . . . . . . 95
N2000 LED Definitions. . . . . . . . . . . . . . . . 97
Power Consumption for N2000 Series PoE
Switches . . . . . . . . . . . . . . . . . . . . . 100
Dell Networking N3000 Series Switch
Hardware. . . . . . . . . . . . . . . . . . . . . . . . 102
N3000 Series Front Panel . . . . . . . . . . . . . 102
N3000 Series Back Panel . . . . . . . . . . . . . 106
LED Definitions . . . . . . . . . . . . . . . . . . 109
Power Consumption for N3000 Series PoE
Switches . . . . . . . . . . . . . . . . . . . . . 113
Dell Networking N4000 Series Switch
Hardware. . . . . . . . . . . . . . . . . . . . . . . . 115
Front Panel . . . . . . . . . . . . . . . . . . . . 115
N4000 Back Panel. . . . . . . . . . . . . . . . . 119
LED Definitions . . . . . . . . . . . . . . . . . . 121
Switch MAC Addresses . . . . . . . . . . . . . . . . 125
4 Using Dell OpenManage Switch
Administrator . . . . . . . . . . . . . . . . . . . . 127
About Dell OpenManage Switch Administrator. . . . 127
Starting the Application . . . . . . . . . . . . . . . . 128
Understanding the Interface . . . . . . . . . . . . . . 129
Using the Switch Administrator Buttons and
Links . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Defining Fields . . . . . . . . . . . . . . . . . . . . . 132
Understanding the Device View . . . . . . . . . . . . 132
Using the Device View Port Features. . . . . . . 132

Contents 9
Using the Device View Switch Locator
Feature . . . . . . . . . . . . . . . . . . . . . . . 133
5 Using the Command-Line Interface. . . . 135
Accessing the Switch Through the CLI . . . . . . . . . 135
Console Connection . . . . . . . . . . . . . . . . 135
Telnet Connection . . . . . . . . . . . . . . . . . 136
Understanding Command Modes . . . . . . . . . . . . 137
Entering CLI Commands . . . . . . . . . . . . . . . . . 139
Using the Question Mark to Get Help . . . . . . . 139
Using Command Completion . . . . . . . . . . . . 140
Entering Abbreviated Commands . . . . . . . . . 140
Negating Commands . . . . . . . . . . . . . . . . 140
Command Output Paging . . . . . . . . . . . . . . 141
Understanding Error Messages . . . . . . . . . . 141
Recalling Commands from the History Buffer . . . 141
. . . . . . . . . . . . . . . . . . . . . . . . . . . 142
6 Default Settings. . . . . . . . . . . . . . . . . . . 143
7 Setting the IP Address and Other
Basic Network Information . . . . . . . . . . 147
IP Address and Network Information Overview . . . . 147
What Is the Basic Network Information? . . . . . 147
Why Is Basic Network Information
Needed? . . . . . . . . . . . . . . . . . . . . . . 148
How Is Basic Network Information
Configured? . . . . . . . . . . . . . . . . . . . . . 149

10 Contents
What Is Out-of-Band Management and
In-Band Management? . . . . . . . . . . . . . . 149
Default Network Information . . . . . . . . . . . . . 151
Configuring Basic Network Information (Web) . . . . 152
Out-of-Band Interface . . . . . . . . . . . . . . 152
IP Interface Configuration (Default VLAN IP
Address). . . . . . . . . . . . . . . . . . . . . . 153
Route Entry Configuration (Switch Default
Gateway) . . . . . . . . . . . . . . . . . . . . . 155
Domain Name Server . . . . . . . . . . . . . . . 157
Default Domain Name . . . . . . . . . . . . . . 158
Host Name Mapping . . . . . . . . . . . . . . . 159
Dynamic Host Name Mapping . . . . . . . . . . 160
Configuring Basic Network Information (CLI). . . . . 161
Enabling the DHCP Client on the OOB Port . . . . 161
Enabling the DHCP Client on the Default
VLAN . . . . . . . . . . . . . . . . . . . . . . . 161
Managing DHCP Leases . . . . . . . . . . . . . 162
Configuring Static Network Information on
the OOB Port . . . . . . . . . . . . . . . . . . . 163
Configuring Static Network Information on
the Default VLAN . . . . . . . . . . . . . . . . . 163
Configuring and Viewing Additional Network
Information . . . . . . . . . . . . . . . . . . . . 164

Contents 11
Basic Network Information Configuration
Example . . . . . . . . . . . . . . . . . . . . . . . . . 166
8 Managing QSFP Ports . . . . . . . . . . . . . . 169
9 Managing a Switch Stack . . . . . . . . . . . 171
Stacking Overview . . . . . . . . . . . . . . . . . . . 171
Dell Networking N2000, N3000, and N4000
Stacking Compatibility . . . . . . . . . . . . . . . 174
How is the Stack Master Selected? . . . . . . . . 175
Adding a Switch to the Stack. . . . . . . . . . . . 176
Removing a Switch from the Stack. . . . . . . . . 177
How is the Firmware Updated on the Stack? . . . 177
What is Stacking Standby? . . . . . . . . . . . . . 178
What is Nonstop Forwarding? . . . . . . . . . . . 178
Switch Stack MAC Addressing and Stack
Design Considerations . . . . . . . . . . . . . . . 181
NSF Network Design Considerations . . . . . . . 181
Why is Stacking Needed? . . . . . . . . . . . . . 182
Default Stacking Values . . . . . . . . . . . . . . . . . 182
Managing and Monitoring the Stack (Web). . . . . . . 184
Unit Configuration . . . . . . . . . . . . . . . . . 184
Stack Summary . . . . . . . . . . . . . . . . . . . 185
Stack Firmware Synchronization . . . . . . . . . . 186
Supported Switches . . . . . . . . . . . . . . . . 187
Stack Port Summary . . . . . . . . . . . . . . . . 188
Stack Port Counters . . . . . . . . . . . . . . . . 189
Stack Port Diagnostics . . . . . . . . . . . . . . . 189
NSF Summary. . . . . . . . . . . . . . . . . . . . 190
Checkpoint Statistics . . . . . . . . . . . . . . . . 191

12 Contents
Managing the Stack (CLI) . . . . . . . . . . . . . . . 192
Configuring Stack Member, Stack Port, and
NSF Settings . . . . . . . . . . . . . . . . . . . 192
Viewing and Clearing Stacking and NSF
Information . . . . . . . . . . . . . . . . . . . . 194
Stacking and NSF Usage Scenarios . . . . . . . . . . 195
Basic Failover . . . . . . . . . . . . . . . . . . . 195
Preconfiguring a Stack Member . . . . . . . . . 197
NSF in the Data Center . . . . . . . . . . . . . . 199
NSF and VoIP . . . . . . . . . . . . . . . . . . . 200
NSF and DHCP Snooping . . . . . . . . . . . . . 201
NSF and the Storage Access Network . . . . . . 202
NSF and Routed Access . . . . . . . . . . . . . 204
10 Configuring Authentication,
Authorization, and Accounting . . . . . . . 207
AAA Overview . . . . . . . . . . . . . . . . . . . . . 207
Methods. . . . . . . . . . . . . . . . . . . . . . 208
Access Lines . . . . . . . . . . . . . . . . . . . 209
Authentication . . . . . . . . . . . . . . . . . . . . . 211
Authentication Types . . . . . . . . . . . . . . . 211
Authorization . . . . . . . . . . . . . . . . . . . . . . 212
Exec Authorization Capabilities. . . . . . . . . . 212
Accounting . . . . . . . . . . . . . . . . . . . . . . . 214
Authentication Examples . . . . . . . . . . . . . . . 215
Local Authentication Example . . . . . . . . . . 215
TACACS+ Authentication Example . . . . . . . . 217
Public Key SSH Authentication Example . . . . . 218
RADIUS Authentication Example . . . . . . . . . 225

Contents 13
Authorization Examples . . . . . . . . . . . . . . . . . 227
Local Authorization Example—Direct
Login to Privileged EXEC Mode. . . . . . . . . . . 227
TACACS+ Authorization Example—Direct
Login to Privileged EXEC Mode. . . . . . . . . . . 227
TACACS+ Authorization Example—
Administrative Profiles . . . . . . . . . . . . . . . 228
TACACS+ Authorization Example—Custom
Administrative Profile. . . . . . . . . . . . . . . . 229
TACACS+ Authorization Example—
Per-command Authorization . . . . . . . . . . . . 230
RADIUS Authorization Example—Direct
Login to Privileged EXEC Mode. . . . . . . . . . . 231
RADIUS Authorization Example—
Administrative Profiles . . . . . . . . . . . . . . . 232
Using RADIUS Servers to Control Management
Access . . . . . . . . . . . . . . . . . . . . . . . . . . 232
How Does RADIUS Control Management
Access?. . . . . . . . . . . . . . . . . . . . . . . 232
Which RADIUS Attributes Does the Switch
Support? . . . . . . . . . . . . . . . . . . . . . . 234
How Are RADIUS Attributes Processed on
the Switch? . . . . . . . . . . . . . . . . . . . . . 236
Using TACACS+ Servers to Control Management
Access . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Which TACACS+ Attributes Does the Switch
Support? . . . . . . . . . . . . . . . . . . . . . . 238
Default Configurations. . . . . . . . . . . . . . . . . . 239
Method Lists . . . . . . . . . . . . . . . . . . . . 239
Access Lines (AAA) . . . . . . . . . . . . . . . . 239
Access Lines (Non-AAA) . . . . . . . . . . . . . . 240
Administrative Profiles . . . . . . . . . . . . . . . 240

14 Contents
11 Monitoring and Logging System
Information . . . . . . . . . . . . . . . . . . . . . . 243
System Monitoring Overview . . . . . . . . . . . . . 243
What System Information Is Monitored? . . . . . 243
Why Is System Information Needed?. . . . . . . 244
Where Are Log Messages Sent? . . . . . . . . . 244
What Are the Severity Levels? . . . . . . . . . . 245
What Are the System Startup and Operation
Logs? . . . . . . . . . . . . . . . . . . . . . . . 245
What Is the Log Message Format? . . . . . . . . 246
What Factors Should Be Considered When
Configuring Logging? . . . . . . . . . . . . . . . 247
Default Log Settings . . . . . . . . . . . . . . . . . . 248
Monitoring System Information and Configuring
Logging (Web) . . . . . . . . . . . . . . . . . . . . . 249
Device Information . . . . . . . . . . . . . . . . 249
System Health. . . . . . . . . . . . . . . . . . . 251
System Resources . . . . . . . . . . . . . . . . 252
Unit Power Usage History . . . . . . . . . . . . 253
Integrated Cable Test for Copper Cables . . . . . 254
Optical Transceiver Diagnostics . . . . . . . . . 255
Log Global Settings . . . . . . . . . . . . . . . . 257
RAM Log . . . . . . . . . . . . . . . . . . . . . 258
Log File . . . . . . . . . . . . . . . . . . . . . . 259
Syslog Server . . . . . . . . . . . . . . . . . . . 259
Email Alert Global Configuration . . . . . . . . . 262
Email Alert Mail Server Configuration . . . . . . 262
Email Alert Subject Configuration . . . . . . . . 264
Email Alert To Address Configuration. . . . . . . 265
Email Alert Statistics . . . . . . . . . . . . . . . 266

Contents 15
Monitoring System Information and Configuring
Logging (CLI) . . . . . . . . . . . . . . . . . . . . . . . 267
Viewing System Information and Enabling
the Locator LED. . . . . . . . . . . . . . . . . . . 267
Running Cable Diagnostics . . . . . . . . . . . . . 268
Configuring Local Logging . . . . . . . . . . . . . 269
Configuring Remote Logging . . . . . . . . . . . . 270
Configuring Mail Server Settings. . . . . . . . . . 271
Configuring Email Alerts for Log Messages . . . . 272
Logging Configuration Examples . . . . . . . . . . . . 274
Configuring Local and Remote Logging . . . . . . 274
Configuring Email Alerting . . . . . . . . . . . . . 276
12 Managing General System Settings . . . 279
System Settings Overview. . . . . . . . . . . . . . . . 279
Why Does System Information Need to
Be Configured? . . . . . . . . . . . . . . . . . . . 281
What Are SDM Templates?. . . . . . . . . . . . . 281
Why is the System Time Needed? . . . . . . . . . 283
How Does SNTP Work? . . . . . . . . . . . . . . 283
What Configuration Is Required for Plug-In
Modules? . . . . . . . . . . . . . . . . . . . . . . 284
What Are the Key PoE Plus Features for the
N2024P/N2048P and N3024P/N3048P
Switches?. . . . . . . . . . . . . . . . . . . . . . 285
Default General System Information . . . . . . . . . . 286
Configuring General System Settings (Web) . . . . 287
System Information . . . . . . . . . . . . . . . . . 287
CLI Banner . . . . . . . . . . . . . . . . . . . . . 290
SDM Template Preference . . . . . . . . . . . . . 291
Clock . . . . . . . . . . . . . . . . . . . . . . . . 292
SNTP Global Settings . . . . . . . . . . . . . . . . 293

16 Contents
SNTP Authentication . . . . . . . . . . . . . . . 294
SNTP Server . . . . . . . . . . . . . . . . . . . 296
Summer Time Configuration . . . . . . . . . . . 299
Time Zone Configuration . . . . . . . . . . . . . 300
Card Configuration . . . . . . . . . . . . . . . . 301
Slot Summary . . . . . . . . . . . . . . . . . . . 302
Supported Cards . . . . . . . . . . . . . . . . . 303
Power Over Ethernet Global Configuration
(N2024P/N2048P and N3024P/N3048P Only) . . . 304
Power Over Ethernet Interface Configuration
(N2024P/N2048P and N3024P/N3048P Only) . . . 305
Configuring System Settings (CLI) . . . . . . . . . . . 307
Configuring System Information . . . . . . . . . 307
Configuring the Banner . . . . . . . . . . . . . . 308
Managing the SDM Template. . . . . . . . . . . 309
Configuring SNTP Authentication and an
SNTP Server . . . . . . . . . . . . . . . . . . . 309
Setting the System Time and Date Manually . . . 311
Configuring the Expansion Slots (N3000
Series Only) . . . . . . . . . . . . . . . . . . . . 312
Viewing Slot Information (N4000 Series
Only). . . . . . . . . . . . . . . . . . . . . . . . 313
Configuring PoE Settings (N2024P/N2048P
and N3024P/N3048P Only) . . . . . . . . . . . . 313
General System Settings Configuration
Examples . . . . . . . . . . . . . . . . . . . . . . . . 315
Configuring System and Banner Information. . . 315
Configuring SNTP . . . . . . . . . . . . . . . . . 319
Configuring the Time Manually . . . . . . . . . . 321
13 Configuring SNMP . . . . . . . . . . . . . . . . . 323
SNMP Overview . . . . . . . . . . . . . . . . . . . . 323
What Is SNMP? . . . . . . . . . . . . . . . . . . 323

Contents 17
What Are SNMP Traps? . . . . . . . . . . . . . . 324
Why Is SNMP Needed? . . . . . . . . . . . . . . 325
Default SNMP Values . . . . . . . . . . . . . . . . . . 325
Configuring SNMP (Web) . . . . . . . . . . . . . . . . 327
SNMP Global Parameters . . . . . . . . . . . . . 327
SNMP View Settings . . . . . . . . . . . . . . . . 328
Access Control Group . . . . . . . . . . . . . . . 330
SNMPv3 User Security Model (USM) . . . . . . . 332
Communities . . . . . . . . . . . . . . . . . . . . 335
Notification Filter . . . . . . . . . . . . . . . . . . 337
Notification Recipients . . . . . . . . . . . . . . . 338
Trap Flags . . . . . . . . . . . . . . . . . . . . . . 340
OSPFv2 Trap Flags . . . . . . . . . . . . . . . . . 341
OSPFv3 Trap Flags . . . . . . . . . . . . . . . . . 342
Trap Log . . . . . . . . . . . . . . . . . . . . . . . 343
Configuring SNMP (CLI) . . . . . . . . . . . . . . . . . 345
Configuring the SNMPv3 Engine ID . . . . . . . . 345
Configuring SNMP Views, Groups, and Users . . . 346
Configuring Communities. . . . . . . . . . . . . . 349
Configuring SNMP Notifications (Traps and
Informs) . . . . . . . . . . . . . . . . . . . . . . . 351
SNMP Configuration Examples . . . . . . . . . . . . . 354
Configuring SNMPv1 and SNMPv2. . . . . . . . . 354
Configuring SNMPv3 . . . . . . . . . . . . . . . . 355
14 Managing Images and Files . . . . . . . . . 359
Image and File Management Overview . . . . . . . . . 359
What Files Can Be Managed? . . . . . . . . . . . 359
Why Is File Management Needed?. . . . . . . . . 361

18 Contents
What Methods Are Supported for File
Management?. . . . . . . . . . . . . . . . . . . 363
What Factors Should Be Considered When
Managing Files?. . . . . . . . . . . . . . . . . . 364
How Is the Running Configuration Saved? . . . . 366
Managing Images and Files (Web) . . . . . . . . . . 367
File System . . . . . . . . . . . . . . . . . . . . 367
Active Images. . . . . . . . . . . . . . . . . . . 368
USB Flash Drive . . . . . . . . . . . . . . . . . . 369
File Download . . . . . . . . . . . . . . . . . . . 370
File Upload . . . . . . . . . . . . . . . . . . . . 372
Copy Files . . . . . . . . . . . . . . . . . . . . . 374
Managing Images and Files (CLI) . . . . . . . . . . . 375
Downloading and Activating a New Image
(TFTP) . . . . . . . . . . . . . . . . . . . . . . . 375
Managing Files in Internal Flash . . . . . . . . . 377
Managing Files on a USB Flash Device . . . . . 379
Uploading a Configuration File (SCP) . . . . . . . 379
Managing Configuration Scripts (SFTP) . . . . . 380
File and Image Management Configuration
Examples . . . . . . . . . . . . . . . . . . . . . . . . 381
Upgrading the Firmware . . . . . . . . . . . . . 381
Managing Configuration Scripts . . . . . . . . . 384
Managing Files by Using the USB Flash
Drive. . . . . . . . . . . . . . . . . . . . . . . . 386
15 Automatically Updating the Image
and Configuration . . . . . . . . . . . . . . . . . 389
Auto Configuration Overview . . . . . . . . . . . . . 389
What Is USB Auto Configuration? . . . . . . . . 390
What Files Does USB Auto Configuration
Use? . . . . . . . . . . . . . . . . . . . . . . . . 390

Contents 19
How Does USB Auto Configuration Use the
Files on the USB Device?. . . . . . . . . . . . . . 391
What Is the Setup File Format?. . . . . . . . . . . 392
What Is the DHCP Auto Configuration
Process? . . . . . . . . . . . . . . . . . . . . . . 393
Monitoring and Completing the DHCP Auto
Configuration Process . . . . . . . . . . . . . . . 398
What Are the Dependencies for DHCP Auto
Configuration? . . . . . . . . . . . . . . . . . . . 399
Default Auto Configuration Values . . . . . . . . . . . 400
Managing Auto Configuration (Web) . . . . . . . . . . 401
Auto-Install Configuration . . . . . . . . . . . . . 401
Managing Auto Configuration (CLI) . . . . . . . . . . . 402
Managing Auto Configuration . . . . . . . . . . . 402
Auto Configuration Example. . . . . . . . . . . . . . . 403
Enabling USB Auto Configuration and Auto
Image Download . . . . . . . . . . . . . . . . . . 403
Enabling DHCP Auto Configuration and Auto
Image Download . . . . . . . . . . . . . . . . . . 405
Easy Image Upgrade via USB . . . . . . . . . . . 406
16 Monitoring Switch Traffic . . . . . . . . . . . 407
Traffic Monitoring Overview . . . . . . . . . . . . . . 407
What is sFlow Technology?. . . . . . . . . . . . . 407
What is RMON?. . . . . . . . . . . . . . . . . . . 410
What is Port Mirroring?. . . . . . . . . . . . . . . 411
Port Mirroring Behaviors . . . . . . . . . . . . . . 412
Remote Capture. . . . . . . . . . . . . . . . . . . 413
Why is Traffic Monitoring Needed? . . . . . . . . 413

20 Contents
Default Traffic Monitoring Values . . . . . . . . . . . 414
Monitoring Switch Traffic (Web) . . . . . . . . . . . 414
sFlow Agent Summary . . . . . . . . . . . . . . 414
sFlow Receiver Configuration . . . . . . . . . . 416
sFlow Sampler Configuration . . . . . . . . . . . 417
sFlow Poll Configuration . . . . . . . . . . . . . 418
Interface Statistics . . . . . . . . . . . . . . . . 419
Etherlike Statistics . . . . . . . . . . . . . . . . 420
GVRP Statistics . . . . . . . . . . . . . . . . . . 421
EAP Statistics . . . . . . . . . . . . . . . . . . . 422
Utilization Summary. . . . . . . . . . . . . . . . 423
Counter Summary . . . . . . . . . . . . . . . . . 424
Switchport Statistics . . . . . . . . . . . . . . . 425
RMON Statistics . . . . . . . . . . . . . . . . . 426
RMON History Control Statistics . . . . . . . . . 427
RMON History Table . . . . . . . . . . . . . . . 429
RMON Event Control . . . . . . . . . . . . . . . 430
RMON Event Log . . . . . . . . . . . . . . . . . 432
RMON Alarms. . . . . . . . . . . . . . . . . . . 433
Port Statistics . . . . . . . . . . . . . . . . . . . 435
LAG Statistics . . . . . . . . . . . . . . . . . . . 436
Port Mirroring . . . . . . . . . . . . . . . . . . . 437
Monitoring Switch Traffic (CLI) . . . . . . . . . . . . 439
Configuring sFlow . . . . . . . . . . . . . . . . . 439
Configuring RMON . . . . . . . . . . . . . . . . 441
Viewing Statistics . . . . . . . . . . . . . . . . . 443
Configuring Port Mirroring . . . . . . . . . . . . 444
Configuring RSPAN . . . . . . . . . . . . . . . . 445
Traffic Monitoring Configuration Examples . . . . . . 447
Configuring sFlow . . . . . . . . . . . . . . . . . 447
Configuring RMON . . . . . . . . . . . . . . . . 449
Configuring Remote Capture . . . . . . . . . . . 450
Configuring RSPAN . . . . . . . . . . . . . . . . 455