Cisco Catalyst 2960-L Series Switches Configuration Guide

Brand: Cisco

Model: Catalyst 2960-L Series Switches

Category: Software

Type: Configuration Guide

This manual is also suitable for

Catalyst 2960-L Series Switches

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst

2960-L Switches)

First Published: 2017-08-08

Last Modified: 2018-12-18

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Fax: 408 527-0883

CONTENTS

Preface lv

PREFACE

Document Conventions lv

Obtaining Documentation and Submitting a Service Request lvii

Using the Command-Line Interface 1

CHAPTER 1

Information About Using the Command-Line Interface 1

Command Modes 1

Understanding Abbreviated Commands 3

No and Default Forms of Commands 3

CLI Error Messages 3

Configuration Logging 4

Using the Help System 4

How to Use the CLI to Configure Features 5

Configuring the Command History 5

Changing the Command History Buffer Size 6

Recalling Commands 6

Disabling the Command History Feature 7

Enabling and Disabling Editing Features 7

Editing Commands Through Keystrokes 7

Editing Command Lines That Wrap 8

Searching and Filtering Output of show and more Commands 10

Accessing the CLI Through a Console Connection or Through Telnet 10

Accessing the CLI through Bluetooth 11

Interface and Hardware 13

PART I

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Configuring Interface Characteristics 15

CHAPTER 2

Information About Configuring Interface Characteristics 15

Interface Types 15

Port-Based VLANs 15

Switch Ports 16

Routed Ports 17

Switch Virtual Interfaces 17

EtherChannel Port Groups 17

Power over Ethernet Ports 18

Using the Switch USB Ports 18

USB Mini-Type B Console Port 18

USB Type A Ports 19

Interface Connections 19

Interface Configuration Mode 19

Default Ethernet Interface Configuration 20

Interface Speed and Duplex Mode 21

Speed and Duplex Configuration Guidelines 21

IEEE 802.3x Flow Control 22

How to Configure Interface Characteristics 23

Configuring Interfaces 23

Adding a Description for an Interface 24

Configuring a Range of Interfaces 25

Configuring and Using Interface Range Macros 26

Configuring Ethernet Interfaces 28

Setting the Interface Speed and Duplex Parameters 28

Configuring IEEE 802.3x Flow Control 29

Shutting Down and Restarting the Interface 30

Configuring the Console Media Type 32

Configuring the USB Inactivity Timeout 33

Monitoring Interface Characteristics 34

Monitoring Interface Status 34

Clearing and Resetting Interfaces and Counters 35

Configuration Examples for Interface Characteristics 35

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Contents

Configuring a Range of Interfaces: Examples 35

Configuring and Using Interface Range Macros: Examples 36

Setting Interface Speed and Duplex Mode: Example 36

Configuring the Console Media Type: Example 36

Configuring the USB Inactivity Timeout: Example 37

Additional References for the Interface Characteristics Feature 37

Feature History and Information for Configuring Interface Characteristics 38

Configuring Auto-MDIX 39

CHAPTER 3

Prerequisites for Auto-MDIX 39

Restrictions for Auto-MDIX 39

Information About Configuring Auto-MDIX 39

Auto-MDIX on an Interface 39

How to Configure Auto-MDIX 40

Configuring Auto-MDIX on an Interface 40

Example for Configuring Auto-MDIX 41

Additional References 42

Feature History and Information for Auto-MDIX 42

Configuring LLDP, LLDP-MED, and Wired Location Service 43

CHAPTER 4

Finding Feature Information 43

Information About LLDP, LLDP-MED, and Wired Location Service 43

LLDP 43

LLDP Supported TLVs 44

LLDP and Cisco Medianet 44

LLDP-MED 44

LLDP-MED Supported TLVs 44

Default LLDP Configuration 45

Restrictions for LLDP 46

How to Configure LLDP, LLDP-MED, and Wired Location Service 46

Enabling LLDP 46

Configuring LLDP Characteristics 48

Configuring LLDP-MED TLVs 50

Configuring Network-Policy TLV 51

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Contents

Configuration Examples for LLDP, LLDP-MED, and Wired Location Service 54

Configuring Network-Policy TLV: Examples 54

Monitoring and Maintaining LLDP, LLDP-MED, and Wired Location Service 54

Additional References for LLDP, LLDP-MED, and Wired Location Service 55

Feature Information for LLDP, LLDP-MED, and Wired Location Service 56

Configuring System MTU 57

CHAPTER 5

Finding Feature Information 57

Information About the MTU 57

How to Configure MTU 57

Configuring the System MTU 57

Configuration Examples for System MTU 58

Configuring PoE 61

CHAPTER 6

Finding Feature Information 61

Information About PoE 61

Power over Ethernet Ports 61

Supported Protocols and Standards 61

Powered-Device Detection and Initial Power Allocation 62

Power Management Modes 63

Persistent PoE 66

How to Configure PoE 66

Configuring a Power Management Mode on a PoE Port 66

Configuring Persistent PoE 68

Budgeting Power for Devices Connected to a PoE Port 69

Budgeting Power to All PoE ports 70

Budgeting Power to a Specific PoE Port 71

Configuring Power Policing 72

Monitoring Power Status 75

Configuration Examples for Configuring PoE 75

Budgeting Power: Example 75

Configuring EEE 77

CHAPTER 7

Restrictions for EEE 77

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Contents

Information About EEE 77

EEE Overview 77

Default EEE Configuration 77

How to Configure EEE 77

Enabling or Disabling EEE 78

Monitoring EEE 79

Configuration Examples for Configuring EEE 80

Additional References 80

Feature Information for Configuring EEE 81

IP Multicast Snooping 83

PART II

Configuring IGMP Snooping 85

CHAPTER 8

Finding Feature Information 85

Prerequisites for Configuring IGMP Snooping 85

Prerequisites for IGMP Snooping 85

Restrictions for Configuring IGMP Snooping 86

Restrictions for IGMP Snooping 86

Information About IGMP Snooping 87

IGMP Snooping 87

IGMP Versions 88

Joining a Multicast Group 88

Leaving a Multicast Group 89

Immediate Leave 90

IGMP Configurable-Leave Timer 90

IGMP Report Suppression 90

Default IGMP Snooping Configuration 91

IGMP Filtering and Throttling 91

Default IGMP Filtering and Throttling Configuration 92

How to Configure IGMP Snooping 92

Enabling or Disabling IGMP Snooping on a Switch 92

Enabling or Disabling IGMP Snooping on a VLAN Interface 94

Configuring a Multicast Router Port 95

Configuring a Host Statically to Join a Group 96

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Contents

Enabling IGMP Immediate Leave 97

Configuring the IGMP Leave Timer 99

Configuring the IGMP Snooping Querier 100

Disabling IGMP Report Suppression 102

Configuring IGMP Profiles 104

Applying IGMP Profiles 106

Setting the Maximum Number of IGMP Groups 107

Configuring the IGMP Throttling Action 109

Monitoring IGMP Snooping 111

Monitoring IGMP Snooping Information 111

Monitoring IGMP Filtering 112

Configuration Examples for IGMP Snooping 112

Example: Enabling a Static Connection to a Multicast Router 112

Example: Configuring a Host Statically to Join a Group 112

Example: Enabling IGMP Immediate Leave 112

Example: Setting the IGMP Snooping Querier Source Address 113

Example: Setting the IGMP Snooping Querier Maximum Response Time 113

Example: Setting the IGMP Snooping Querier Timeout 113

Example: Setting the IGMP Snooping Querier Feature 113

Example: Configuring IGMP Profiles 114

Example: Applying IGMP Profile 114

Example: Setting the Maximum Number of IGMP Groups 114

Additional References 114

Configuring MLD Snooping 117

CHAPTER 9

Finding Feature Information 117

Information About Configuring IPv6 MLD Snooping 117

Understanding MLD Snooping 117

MLD Messages 118

MLD Queries 118

Multicast Client Aging Robustness 119

Multicast Router Discovery 119

MLD Reports 119

MLD Done Messages and Immediate-Leave 120

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Topology Change Notification Processing 120

How to Configure IPv6 MLD Snooping 120

Default MLD Snooping Configuration 120

MLD Snooping Configuration Guidelines 121

Enabling or Disabling MLD Snooping on the Switch 122

Enabling or Disabling MLD Snooping on a VLAN 123

Configuring a Static Multicast Group 123

Enabling MLD Immediate Leave 124

Configuring MLD Snooping Queries 125

Disabling MLD Listener Message Suppression 127

Displaying MLD Snooping Information 127

Configuration Examples for Configuring MLD Snooping 128

Configuring a Static Multicast Group: Example 128

Configuring a Multicast Router Port: Example 128

Enabling MLD Immediate Leave: Example 129

Configuring MLD Snooping Queries: Example 129

IPv6 131

PART III

Configuring IPv6 Unicast Routing 133

CHAPTER 10

Finding Feature Information 133

Information About Configuring IPv6 Host Functions 133

Understanding IPv6 133

IPv6 Addresses 134

Supported IPv6 Unicast Routing Features 134

Default IPv6 Configuration 137

Configuring IPv6 Addressing and Enabling IPv6 Routing 137

Configuring IPv6 ICMP Rate Limiting 140

Configuring Static Routing for IPv6 (CLI) 141

Configuring RIP for IPv6 142

Displaying IPv6 145

Configuration Examples for IPv6 Unicast Routing 145

Configuring IPv6 Addressing and Enabling IPv6 Routing: Example 145

Configuring IPv6 ICMP Rate Limiting: Example 146

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst 2960-L Switches)

Contents

Configuring Static Routing for IPv6: Example 146

Displaying IPv6: Example 146

Configuring IPv6 ACL 147

CHAPTER 11

Finding Feature Information 147

Information About Configuring IPv6 ACLs 147

Understanding IPv6 ACLs 147

Supported ACL Features 148

IPv6 ACL Limitations 148

Configuring IPv6 ACLs 148

Default IPv6 ACL Configuration 149

Interaction with Other Features and Switches 149

Creating IPv6 ACL 149

Applying an IPv6 ACL to an Interface 153

Displaying IPv6 ACLs 153

Configuration Examples for IPv6 ACL 154

Example: Creating an IPv6 ACL 154

Example: Displaying IPv6 ACLs 154

Layer 2 157

PART IV

Configuring Spanning Tree Protocol 159

CHAPTER 12

Finding Feature Information 159

Restrictions for STP 159

Information About Spanning Tree Protocol 160

Spanning Tree Protocol 160

Spanning-Tree Topology and BPDUs 161

Bridge ID, Device Priority, and Extended System ID 162

Port Priority Versus Path Cost 163

Spanning-Tree Interface States 163

How a Switch or Port Becomes the Root Switch or Root Port 166

Spanning Tree and Redundant Connectivity 166

Spanning-Tree Address Management 167

Accelerated Aging to Retain Connectivity 167

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst 2960-L Switches)

Contents

Spanning-Tree Modes and Protocols 167

Supported Spanning-Tree Instances 168

Spanning-Tree Interoperability and Backward Compatibility 168

STP and IEEE 802.1Q Trunks 169

VLAN-Bridge Spanning Tree 169

Default Spanning-Tree Configuration 170

How to Configure Spanning-Tree Features 170

Changing the Spanning-Tree Mode (CLI) 170

Disabling Spanning Tree 172

Configuring the Root Switch 173

Configuring a Secondary Root Device 174

Configuring Port Priority 175

Configuring Path Cost 177

Configuring the Device Priority of a VLAN 178

Configuring the Hello Time 179

Configuring the Forwarding-Delay Time for a VLAN 180

Configuring the Maximum-Aging Time for a VLAN 181

Configuring the Transmit Hold-Count 182

Monitoring Spanning-Tree Status 183

Configuring Multiple Spanning-Tree Protocol 185

CHAPTER 13

Finding Feature Information 185

Prerequisites for MSTP 185

Restrictions for MSTP 186

Information About MSTP 187

MSTP Configuration 187

MSTP Configuration Guidelines 187

Root Switch 188

Multiple Spanning-Tree Regions 188

IST, CIST, and CST 189

Operations Within an MST Region 190

Operations Between MST Regions 190

IEEE 802.1s Terminology 190

Illustration of MST Regions 191

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst 2960-L Switches)

Contents

Hop Count 192

Boundary Ports 192

IEEE 802.1s Implementation 193

Port Role Naming Change 193

Interoperation Between Legacy and Standard Switches 194

Detecting Unidirectional Link Failure 194

Interoperability with IEEE 802.1D STP 195

RSTP Overview 195

Port Roles and the Active Topology 195

Rapid Convergence 196

Synchronization of Port Roles 197

Bridge Protocol Data Unit Format and Processing 198

Topology Changes 199

Protocol Migration Process 200

Default MSTP Configuration 200

About MST-to-PVST+ Interoperability (PVST+ Simulation) 201

About Detecting Unidirectional Link Failure 202

How to Configure MSTP Features 204

Specifying the MST Region Configuration and Enabling MSTP 204

Configuring the Root Switch 206

Configuring a Secondary Root Switch 207

Configuring Port Priority 208

Configuring Path Cost 210

Configuring the Switch Priority 211

Configuring the Hello Time 213

Configuring the Forwarding-Delay Time 214

Configuring the Maximum-Aging Time 215

Configuring the Maximum-Hop Count 216

Specifying the Link Type to Ensure Rapid Transitions 217

Designating the Neighbor Type 218

Restarting the Protocol Migration Process 219

Configuring PVST+ Simulation 220

Enabling PVST+ Simulation on a Port 221

Examples 222

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Contents

Examples: PVST+ Simulation 222

Examples: Detecting Unidirectional Link Failure 226

Monitoring MST Configuration and Status 226

Feature Information for MSTP 227

Configuring Optional Spanning-Tree Features 229

CHAPTER 14

Finding Feature Information 229

Restriction for Optional Spanning-Tree Features 229

Information About Optional Spanning-Tree Features 230

PortFast 230

BPDU Guard 230

BPDU Filtering 231

UplinkFast 231

BackboneFast 233

EtherChannel Guard 235

Root Guard 236

Loop Guard 237

STP PortFast Port Types 237

Bridge Assurance 238

How to Configure Optional Spanning-Tree Features 240

Enabling PortFast 240

Enabling BPDU Guard 242

Enabling BPDU Filtering 243

Enabling UplinkFast for Use with Redundant Links 244

Disabling UplinkFast 246

Enabling BackboneFast 247

Enabling EtherChannel Guard 248

Enabling Root Guard 249

Enabling Loop Guard 250

Enabling PortFast Port Types 251

Configuring the Default Port State Globally 252

Configuring PortFast Edge on a Specified Interface 253

Configuring a PortFast Network Port on a Specified Interface 254

Enabling Bridge Assurance 255

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Contents

Examples 256

Examples: Configuring PortFast Edge on a Specified Interface 256

Examples: Configuring a PortFast Network Port on a Specified Interface 257

Example: Configuring Bridge Assurance 258

Monitoring the Spanning-Tree Status 259

Feature Information for Optional Spanning-Tree Features 259

Configuring Resilient Ethernet Protocol 261

CHAPTER 15

Finding Feature Information 261

Overview of Resilient Ethernet Protocol 261

Link Integrity 263

Fast Convergence 264

VLAN Load Balancing 264

Spanning Tree Interaction 265

REP Ports 266

How to Configure Resilient Ethernet Protocol 266

Default REP Configuration 266

REP Configuration Guidelines 266

Configuring REP Administrative VLAN 268

Configuring a REP Interface 269

Setting Manual Preemption for VLAN Load Balancing 273

Configuring SNMP Traps for REP 274

Monitoring Resilient Ethernet Protocol Configuration 274

Configuration Examples for Resilient Ethernet Protocol 276

Example: Configuring the REP Administrative VLAN 276

Example: Configuring a REP Interface 276

Additional References for REP 277

Feature Information for Resilient Ethernet Protocol 278

Configuring EtherChannels 279

CHAPTER 16

Finding Feature Information 279

Restrictions for EtherChannels 279

Information About EtherChannels 280

EtherChannel Overview 280

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Contents

Channel Groups and Port-Channel Interfaces 280

Port Aggregation Protocol 281

PAgP Modes 282

PAgP Learn Method and Priority 283

PAgP Interaction with Other Features 283

Link Aggregation Control Protocol 284

LACP Modes 284

LACP Interaction with Other Features 285

EtherChannel On Mode 285

Default EtherChannel Configuration 285

EtherChannel Configuration Guidelines 286

Layer 2 EtherChannel Configuration Guidelines 287

Auto-LAG 288

Auto-LAG Configuration Guidelines 289

How to Configure EtherChannels 289

Configuring Layer 2 EtherChannels 289

Configuring the PAgP Learn Method and Priority 291

Configuring LACP Hot-Standby Ports 293

Configuring the LACP System Priority 293

Configuring the LACP Port Priority 294

Configuring the LACP Port Channel Min-Links Feature 296

Configuring LACP Fast Rate Timer 297

Configuring Auto-LAG Globally 298

Configuring Auto-LAG on a Port Interface 299

Configuring Persistence with Auto-LAG 300

Monitoring EtherChannel, PAgP, and LACP Status 301

Configuration Examples for Configuring EtherChannels 302

Configuring Layer 2 EtherChannels: Examples 302

Configuring Auto LAG: Examples 303

Configuring LACP Port Channel Min-Links: Examples 304

Example: Configuring LACP Fast Rate Timer 304

Additional References for EtherChannels 305

Feature Information for EtherChannels 306

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst 2960-L Switches)

Contents

Configuring Link-State Tracking 307

CHAPTER 17

Finding Feature Information 307

Restrictions for Configuring Link-State Tracking 307

Understanding Link-State Tracking 308

How to Configure Link-State Tracking 310

Monitoring Link-State Tracking 311

Configuring Link-State Tracking: Example 311

Feature Information for Link-State Tracking 311

Configuring UniDirectional Link Detection 313

CHAPTER 18

Finding Feature Information 313

Restrictions for Configuring UDLD 313

Information About UDLD 314

Modes of Operation 314

Normal Mode 314

Aggressive Mode 314

Methods to Detect Unidirectional Links 315

Neighbor Database Maintenance 315

Event-Driven Detection and Echoing 315

UDLD Reset Options 315

Default UDLD Configuration 316

How to Configure UDLD 316

Enabling UDLD Globally 316

Enabling UDLD on an Interface 317

Monitoring and Maintaining UDLD 318

Additional References for UDLD 318

Feature Information for UDLD 319

Network Management 321

PART V

Configuring Cisco IOS Configuration Engine 323

CHAPTER 19

Prerequisites for Configuring the Configuration Engine 323

Restrictions for Configuring the Configuration Engine 323

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Information About Configuring the Configuration Engine 324

Cisco Configuration Engine Software 324

Configuration Service 325

Event Service 325

NameSpace Mapper 326

Cisco Networking Services IDs and Device Hostnames 326

ConfigID 326

DeviceID 326

Hostname and DeviceID 327

Hostname, DeviceID, and ConfigID 327

Automated CNS Configuration 327

How to Configure the Configuration Engine 328

Enabling the CNS Event Agent 328

Refreshing DeviceIDs 330

Monitoring CNS Configurations 332

Additional References 333

Feature History and Information for the Configuration Engine 334

Configuring the Cisco Discovery Protocol 335

CHAPTER 20

Finding Feature Information 335

Information About CDP 335

Cisco Discovery Protocol Overview 335

Default Cisco Discovery Protocol Configuration 336

How to Configure CDP 336

Configuring Cisco Discovery Protocol Characteristics 336

Disabling Cisco Discovery Protocol 338

Enabling Cisco Discovery Protocol 340

Disabling Cisco Discovery Protocol on an Interface 341

Enabling Cisco Discovery Protocol on an Interface 343

Monitoring and Maintaining Cisco Discovery Protocol 344

Additional References 345

Feature History and Information for Cisco Discovery Protocol 346

Configuring Simple Network Management Protocol 347

CHAPTER 21

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Contents

Prerequisites for SNMP 347

Restrictions for SNMP 349

Information About SNMP 349

SNMP Overview 349

SNMP Manager Functions 350

SNMP Agent Functions 350

SNMP Community Strings 351

SNMP MIB Variables Access 351

SNMP Notifications 351

SNMP ifIndex MIB Object Values 352

Default SNMP Configuration 352

SNMP Configuration Guidelines 353

How to Configure SNMP 354

Disabling the SNMP Agent 354

Configuring Community Strings 355

Configuring SNMP Groups and Users 357

Configuring SNMP Notifications 360

Setting the Agent Contact and Location Information 365

Limiting TFTP Servers Used Through SNMP 366

Monitoring SNMP Status 368

SNMP Examples 368

Additional References 369

Feature History and Information for Simple Network Management Protocol 370

Configuring SPAN 371

CHAPTER 22

Finding Feature Information 371

Restrictions for SPAN 371

Information About SPAN 372

SPAN 372

Default SPAN Configuration 372

Configuration Guidelines 373

SPAN Configuration Guidelines 373

How to Configure SPAN 373

Creating a Local SPAN Session 373

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Contents

Creating a Local SPAN Session and Configuring Incoming Traffic 375

Monitoring SPAN Operations 377

SPAN Configuration Examples 377

Example: Configuring Local SPAN 377

Additional References 378

Feature History and Information for SPAN 379

QoS 381

PART VI

Configuring QoS 383

CHAPTER 23

Finding Feature Information 383

Prerequisites for QoS 383

QoS ACL Guidelines 383

Policing Guidelines 384

General QoS Guidelines 384

Restrictions for QoS 384

Information About QoS 385

QoS Implementation 385

Layer 2 Frame Prioritization Bits 386

Layer 3 Packet Prioritization Bits 386

End-to-End QoS Solution Using Classification 386

QoS Basic Model 386

Actions at Ingress Port 386

Actions at Egress Port 387

Classification Overview 387

Policing and Marking Overview 390

Queueing and Scheduling Overview 391

Queueing and Scheduling on Egress Queues 393

Packet Modification 394

Standard QoS Default Configuration 394

Default Egress Queue Configuration 395

Default Mapping Table Configuration 396

How to Configure QoS 396

Enabling QoS Globally 396

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Configuring Classification Using Port Trust States 397

Configuring the Trust State on Ports Within the QoS Domain 397

Configuring the CoS Value for an Interface 398

Configuring a Trusted Boundary to Ensure Port Security 400

Enabling DSCP Transparency Mode 402

Configuring the DSCP Trust State on a Port Bordering Another QoS Domain 404

Configuring a QoS Policy 405

Classifying Traffic by Using ACLs 406

Classifying Traffic by Using Class Maps 413

Classifying, Policing, and Marking Traffic on Physical Ports by Using Policy Maps 415

Configuring Egress Queue Characteristics 418

Configuration Guidelines 419

Mapping DSCP or CoS Values to an Egress Queue and to a Threshold ID 419

Configuring SRR Shaped Weights on Egress Queues 421

Configuring SRR Shared Weights on Egress Queues 423

Configuring the Egress Expedite Queue 424

Limiting the Bandwidth on an Egress Interface 426

Monitoring Standard QoS 427

Configuration Examples for QoS 428

Example: Configuring Port to the DSCP-Trusted State and Modifying the DSCP-to-DSCP-Mutation

Map 428

Examples: Classifying Traffic by Using ACLs 428

Examples: Classifying Traffic by Using Class Maps 429

Examples: Classifying, Policing, and Marking Traffic on Physical Ports Using Policy Maps 430

Examples: Configuring DSCP-to-DSCP Mutation Maps 431

Examples: Configuring Egress Queue Characteristics 432

Where to Go Next 433

Feature History and Information for QoS 433

Configuring AutoQoS 435

CHAPTER 24

Finding Feature Information 435

Prerequisites for Auto-QoS 435

Restrictions for Auto-QoS 436

Information about Configuring Auto-QoS 436

Software Configuration Guide, Cisco IOS Release 15.2(6)E (Catalyst 2960-L Switches)

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Cisco Catalyst 2960-L Series Switches Configuration Guide

Brand: Cisco

Model: Catalyst 2960-L Series Switches

Category: Software

Type: Configuration Guide

This manual is also suitable for

Catalyst 2960-L Series Switches

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Cisco Catalyst 2960-L Series Switches Configuration Guide

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Cisco Catalyst 2960-L Series Switches Configuration Guide

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