Cisco IOS SOFTWARE RELEASE 15.2(3)E Configuration Guide

Software Configuration Guide, Cisco IOS Release 15.2(7)E (Catalyst

Digital Building Series Switches)

First Published: 2019-03-27

Americas Headquarters

Cisco Systems, Inc.

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Fax: 408 527-0883

CONTENTS

Preface liii

PREFACE

Document Conventions liii

Obtaining Documentation and Submitting a Service Request lv

Interface and Hardware 57

PART I

Configuring Interface Characteristics 1

CHAPTER 1

Information About Configuring Interface Characteristics 1

Interface Types 1

Port-Based VLANs 1

Switch Ports 2

Routed Ports 3

Switch Virtual Interfaces 3

EtherChannel Port Groups 4

Power over Ethernet Ports 4

Using the Switch USB Ports 4

USB Mini-Type B Console Port 4

USB Type A Ports 5

Interface Connections 5

Interface Configuration Mode 6

Default Ethernet Interface Configuration 7

Interface Speed and Duplex Mode 8

Speed and Duplex Configuration Guidelines 8

IEEE 802.3x Flow Control 9

How to Configure Interface Characteristics 10

Configuring Interfaces 10

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Adding a Description for an Interface 11

Configuring a Range of Interfaces 12

Configuring and Using Interface Range Macros 13

Configuring Ethernet Interfaces 15

Setting the Interface Speed and Duplex Parameters 15

Configuring IEEE 802.3x Flow Control 16

Shutting Down and Restarting the Interface 17

Configuring the Console Media Type 19

Configuring the USB Inactivity Timeout 20

Monitoring Interface Characteristics 21

Monitoring Interface Status 21

Clearing and Resetting Interfaces and Counters 22

Configuration Examples for Interface Characteristics 22

Configuring a Range of Interfaces: Examples 22

Configuring and Using Interface Range Macros: Examples 23

Setting Interface Speed and Duplex Mode: Example 23

Configuring the Console Media Type: Example 23

Configuring the USB Inactivity Timeout: Example 24

Additional References for the Interface Characteristics Feature 24

Feature History and Information for Configuring Interface Characteristics 25

Configuring Auto-MDIX 27

CHAPTER 2

Prerequisites for Auto-MDIX 27

Restrictions for Auto-MDIX 27

Information About Configuring Auto-MDIX 27

Auto-MDIX on an Interface 27

How to Configure Auto-MDIX 28

Configuring Auto-MDIX on an Interface 28

Example for Configuring Auto-MDIX 29

Additional References 30

Feature History and Information for Auto-MDIX 30

Configuring LLDP, LLDP-MED, and Wired Location Service 31

CHAPTER 3

Finding Feature Information 31

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Information About LLDP, LLDP-MED, and Wired Location Service 31

LLDP 31

LLDP Supported TLVs 32

LLDP and Cisco Medianet 32

LLDP-MED 32

LLDP-MED Supported TLVs 32

Default LLDP Configuration 33

Restrictions for LLDP 34

How to Configure LLDP, LLDP-MED, and Wired Location Service 34

Enabling LLDP 34

Configuring LLDP Characteristics 36

Configuring LLDP-MED TLVs 38

Configuring Network-Policy TLV 39

Configuration Examples for LLDP, LLDP-MED, and Wired Location Service 42

Configuring Network-Policy TLV: Examples 42

Monitoring and Maintaining LLDP, LLDP-MED, and Wired Location Service 42

Configuring System MTU 45

CHAPTER 4

Finding Feature Information 45

Information About the MTU 45

How to Configure MTU 45

Configuring the System MTU 45

Configuration Examples for System MTU 46

Configuring EEE 49

CHAPTER 5

Restrictions for EEE 49

Information About EEE 49

EEE Overview 49

Default EEE Configuration 50

How to Configure EEE 50

Enabling or Disabling EEE 50

Monitoring EEE 51

Configuration Examples for Configuring EEE 52

Additional References 52

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Feature History for Configuring EEE 52

IP Multicast Snooping 55

PART II

Configuring IGMP Snooping 57

CHAPTER 6

Finding Feature Information 57

Prerequisites for Configuring IGMP Snooping 57

Prerequisites for IGMP Snooping 57

Restrictions for Configuring IGMP Snooping 58

Restrictions for IGMP Snooping 58

Information About IGMP Snooping 59

IGMP Snooping 59

IGMP Versions 60

Joining a Multicast Group 60

Leaving a Multicast Group 62

Immediate Leave 62

IGMP Configurable-Leave Timer 62

IGMP Report Suppression 63

Default IGMP Snooping Configuration 63

IGMP Filtering and Throttling 64

Default IGMP Filtering and Throttling Configuration 64

How to Configure IGMP Snooping 65

Enabling or Disabling IGMP Snooping on a Device 65

Enabling or Disabling IGMP Snooping on a VLAN Interface 66

Setting the Snooping Method 67

Configuring a Multicast Router Port 69

Enabling IGMP Immediate Leave 70

Configuring the IGMP Leave Timer 71

Configuring TCN-Related Commands 73

Controlling the Multicast Flooding Time After a TCN Event 73

Recovering from Flood Mode 74

Disabling Multicast Flooding During a TCN Event 76

Configuring the IGMP Snooping Querier 77

Disabling IGMP Report Suppression 79

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Configuring IGMP Profiles 80

Applying IGMP Profiles 83

Setting the Maximum Number of IGMP Groups 84

Configuring the IGMP Throttling Action 85

Monitoring IGMP Snooping 87

Monitoring IGMP Snooping Information 87

Monitoring IGMP Filtering 88

Configuration Examples for IGMP Snooping 89

Example: Configuring IGMP Snooping Using CGMP Packets 89

Example: Enabling a Static Connection to a Multicast Router 89

Example: Enabling IGMP Immediate Leave 89

Example: Setting the IGMP Snooping Querier Source Address 89

Example: Setting the IGMP Snooping Querier Maximum Response Time 89

Example: Setting the IGMP Snooping Querier Timeout 90

Example: Setting the IGMP Snooping Querier Feature 90

Example: Configuring IGMP Profiles 90

Example: Applying IGMP Profile 90

Example: Setting the Maximum Number of IGMP Groups 91

Additional References 91

Feature History and Information for IGMP Snooping 92

Configuring MLD Snooping 93

CHAPTER 7

Finding Feature Information 93

Information About Configuring IPv6 MLD Snooping 93

Understanding MLD Snooping 93

MLD Messages 94

MLD Queries 94

Multicast Client Aging Robustness 95

Multicast Router Discovery 95

MLD Reports 95

MLD Done Messages and Immediate-Leave 96

Topology Change Notification Processing 96

How to Configure IPv6 MLD Snooping 96

Default MLD Snooping Configuration 96

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MLD Snooping Configuration Guidelines 97

Enabling or Disabling MLD Snooping on the Switch 98

Enabling or Disabling MLD Snooping on a VLAN 99

Configuring a Static Multicast Group 99

Enabling MLD Immediate Leave 100

Configuring MLD Snooping Queries 101

Disabling MLD Listener Message Suppression 103

Displaying MLD Snooping Information 103

Configuration Examples for Configuring MLD Snooping 104

Configuring a Static Multicast Group: Example 104

Configuring a Multicast Router Port: Example 104

Enabling MLD Immediate Leave: Example 105

Configuring MLD Snooping Queries: Example 105

IPv6 107

PART III

IPv6 Network Management 109

CHAPTER 8

Finding Feature Information 109

HTTP(S) IPv6 Support 109

Disabling HTTP Access to an IPv6 Device 109

Example: Disabling HTTP Access to the Device 110

Configuring IPv6 ACL 111

CHAPTER 9

Finding Feature Information 111

Information About Configuring IPv6 ACLs 111

Understanding IPv6 ACLs 111

Supported ACL Features 112

IPv6 ACL Limitations 112

Configuring IPv6 ACLs 112

Default IPv6 ACL Configuration 113

Interaction with Other Features and Switches 113

Creating IPv6 ACL 113

Applying an IPv6 ACL to an Interface 117

Displaying IPv6 ACLs 117

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Configuration Examples for IPv6 ACL 118

Example: Creating an IPv6 ACL 118

Example: Displaying IPv6 ACLs 118

IPv6 Embedded Management Components 121

CHAPTER 10

Finding Feature Information 121

Syslog 121

Configuring Syslog over IPv6 121

Example: Configuring Syslog over IPv6 122

SNMP over IPv6 123

CHAPTER 11

Finding Feature Information 123

SNMP over IPv6 123

SNMP over an IPv6 Transport 123

Configuring an SNMP Notification Server over IPv6 124

Examples: Configuring an SNMP Notification Server over IPv6 126

IPv6 Stateless Autoconfiguration 127

CHAPTER 12

Finding Feature Information 127

IPv6 Stateless Autoconfiguration 127

Simplified Network Renumbering for IPv6 Hosts 127

Configuring IPv6 Stateless Autoconfiguration 128

Example: Displaying IPv6 Interface Statistics 129

Layer 2 131

PART IV

Configuring Spanning Tree Protocol 133

CHAPTER 13

Finding Feature Information 133

Restrictions for STP 133

Information About Spanning Tree Protocol 134

Spanning Tree Protocol 134

Spanning-Tree Topology and BPDUs 135

Bridge ID, Device Priority, and Extended System ID 136

Port Priority Versus Path Cost 137

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Spanning-Tree Interface States 138

How a Device or Port Becomes the Root Device or Root Port 141

Spanning Tree and Redundant Connectivity 141

Spanning-Tree Address Management 142

Accelerated Aging to Retain Connectivity 142

Spanning-Tree Modes and Protocols 142

Supported Spanning-Tree Instances 143

Spanning-Tree Interoperability and Backward Compatibility 143

STP and IEEE 802.1Q Trunks 144

VLAN-Bridge Spanning Tree 144

Default Spanning-Tree Configuration 145

How to Configure Spanning-Tree Features 145

Changing the Spanning-Tree Mode (CLI) 145

Disabling Spanning Tree 147

Configuring the Root Device 148

Configuring a Secondary Root Device 149

Configuring Port Priority 150

Configuring Path Cost 152

Configuring the Device Priority of a VLAN 153

Configuring the Hello Time 154

Configuring the Forwarding-Delay Time for a VLAN 155

Configuring the Maximum-Aging Time for a VLAN 156

Configuring the Transmit Hold-Count 157

Monitoring Spanning-Tree Status 158

Configuring Multiple Spanning-Tree Protocol 159

CHAPTER 14

Finding Feature Information 159

Prerequisites for MSTP 159

Restrictions for MSTP 160

Information About MSTP 161

MSTP Configuration 161

MSTP Configuration Guidelines 161

Root Switch 162

Multiple Spanning-Tree Regions 162

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IST, CIST, and CST 163

Operations Within an MST Region 164

Operations Between MST Regions 164

IEEE 802.1s Terminology 164

Illustration of MST Regions 165

Hop Count 166

Boundary Ports 166

IEEE 802.1s Implementation 167

Port Role Naming Change 167

Interoperation Between Legacy and Standard Devices 167

Detecting Unidirectional Link Failure 168

Interoperability with IEEE 802.1D STP 168

RSTP Overview 169

Port Roles and the Active Topology 169

Rapid Convergence 170

Synchronization of Port Roles 171

Bridge Protocol Data Unit Format and Processing 172

Topology Changes 173

Protocol Migration Process 174

Default MSTP Configuration 174

About MST-to-PVST+ Interoperability (PVST+ Simulation) 175

About Detecting Unidirectional Link Failure 176

How to Configure MSTP Features 177

Specifying the MST Region Configuration and Enabling MSTP 177

Configuring the Root Device 180

Configuring a Secondary Root Device 181

Configuring Port Priority 182

Configuring Path Cost 184

Configuring the Device Priority 185

Configuring the Hello Time 187

Configuring the Forwarding-Delay Time 188

Configuring the Maximum-Aging Time 189

Configuring the Maximum-Hop Count 189

Specifying the Link Type to Ensure Rapid Transitions 190

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Designating the Neighbor Type 192

Restarting the Protocol Migration Process 193

Configuring PVST+ Simulation 194

Enabling PVST+ Simulation on a Port 195

Examples 196

Examples: PVST+ Simulation 196

Examples: Detecting Unidirectional Link Failure 200

Monitoring MST Configuration and Status 200

Feature Information for MSTP 201

Configuring Optional Spanning-Tree Features 203

CHAPTER 15

Finding Feature Information 203

Restriction for Optional Spanning-Tree Features 203

Information About Optional Spanning-Tree Features 204

PortFast 204

BPDU Guard 204

BPDU Filtering 205

UplinkFast 205

BackboneFast 207

EtherChannel Guard 209

Root Guard 210

Loop Guard 211

STP PortFast Port Types 211

Bridge Assurance 212

How to Configure Optional Spanning-Tree Features 214

Enabling PortFast 214

Enabling BPDU Guard 216

Enabling BPDU Filtering 217

Enabling UplinkFast for Use with Redundant Links 218

Disabling UplinkFast 220

Enabling BackboneFast 221

Enabling EtherChannel Guard 222

Enabling Root Guard 223

Enabling Loop Guard 224

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Enabling PortFast Port Types 225

Configuring the Default Port State Globally 226

Configuring PortFast Edge on a Specified Interface 227

Configuring a PortFast Network Port on a Specified Interface 228

Enabling Bridge Assurance 229

Examples 230

Examples: Configuring PortFast Edge on a Specified Interface 230

Examples: Configuring a PortFast Network Port on a Specified Interface 231

Example: Configuring Bridge Assurance 232

Monitoring the Spanning-Tree Status 233

Feature Information for Optional Spanning-Tree Features 233

Configuring Resilient Ethernet Protocol 235

CHAPTER 16

Finding Feature Information 235

Overview of Resilient Ethernet Protocol 235

Link Integrity 237

Fast Convergence 238

VLAN Load Balancing 238

Spanning Tree Interaction 239

REP Ports 240

How to Configure Resilient Ethernet Protocol 240

Default REP Configuration 240

REP Configuration Guidelines 240

Configuring REP Administrative VLAN 242

Configuring a REP Interface 243

Setting Manual Preemption for VLAN Load Balancing 247

Configuring SNMP Traps for REP 248

Monitoring Resilient Ethernet Protocol Configuration 248

Configuration Examples for Resilient Ethernet Protocol 250

Example: Configuring the REP Administrative VLAN 250

Example: Configuring a REP Interface 250

Additional References for Resilient Ethernet Protocol 252

Feature Information for Resilient Ethernet Protocol 252

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Configuring EtherChannels 255

CHAPTER 17

Finding Feature Information 255

Restrictions for EtherChannels 255

Information About EtherChannels 256

EtherChannel Overview 256

EtherChannel Modes 256

EtherChannel on Devices 257

EtherChannel Link Failover 258

Channel Groups and Port-Channel Interfaces 258

Port Aggregation Protocol 259

PAgP Modes 260

PAgP Learn Method and Priority 261

PAgP Interaction with Virtual Switches and Dual-Active Detection 261

PAgP Interaction with Other Features 262

Link Aggregation Control Protocol 262

LACP Modes 262

LACP Interaction with Other Features 263

EtherChannel On Mode 263

EtherChannel Load Deferral Overview 263

Default EtherChannel Configuration 264

EtherChannel Configuration Guidelines 265

Layer 2 EtherChannel Configuration Guidelines 266

Auto-LAG 267

Auto-LAG Configuration Guidelines 268

How to Configure EtherChannels 269

Configuring Layer 2 EtherChannels 269

Configuring Port Channel Load Deferral 271

Configuring the PAgP Learn Method and Priority 273

Configuring LACP Hot-Standby Ports 274

Configuring the LACP System Priority 275

Configuring the LACP Port Priority 276

Configuring the LACP Port Channel Min-Links Feature 277

Configuring LACP Fast Rate Timer 278

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Configuring Auto-LAG Globally 280

Configuring Auto-LAG on a Port Interface 281

Configuring Persistence with Auto-LAG 282

Monitoring EtherChannel, PAgP, and LACP Status 283

Configuration Examples for Configuring EtherChannels 283

Configuring Layer 2 EtherChannels: Examples 283

Example: Configuring Port Channel Load Deferral 284

Configuring Auto LAG: Examples 284

Configuring LACP Port Channel Min-Links: Examples 285

Example: Configuring LACP Fast Rate Timer 286

Additional References for EtherChannels 287

Feature Information for EtherChannels 288

Configuring the MAC Address-Table Move Update Feature 289

CHAPTER 18

Finding Feature Information 289

Information About MAC Address-Table Move Update 289

MAC Address-Table Move Update 289

MAC Address-Table Move Update Configuration Guidelines 291

How to Configure MAC Address-Table Move Update 291

Configuring MAC Address-Table Move Update 291

Configuring a Device to Obtain and Process MAC Address-Table Move Update Messages 292

Monitoring the MAC Address-Table Move Update 293

Configuration Examples for MAC Address-Table Move Update 293

Configuring the MAC Address-Table Move Update: Examples 293

Configuring UniDirectional Link Detection 295

CHAPTER 19

Finding Feature Information 295

Restrictions for Configuring UDLD 295

Information About UDLD 296

Modes of Operation 296

Normal Mode 296

Aggressive Mode 296

Methods to Detect Unidirectional Links 297

Neighbor Database Maintenance 297

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Event-Driven Detection and Echoing 297

UDLD Reset Options 298

Default UDLD Configuration 298

How to Configure UDLD 298

Enabling UDLD Globally 298

Enabling UDLD on an Interface 300

Monitoring and Maintaining UDLD 301

Additional References for UDLD 301

Feature Information for UDLD 302

Network Management 303

PART V

Configuring Cisco IOS Configuration Engine 305

CHAPTER 20

Prerequisites for Configuring the Configuration Engine 305

Restrictions for Configuring the Configuration Engine 305

Information About Configuring the Configuration Engine 306

Cisco Configuration Engine Software 306

Configuration Service 307

Event Service 307

NameSpace Mapper 308

Cisco Networking Services IDs and Device Hostnames 308

ConfigID 308

DeviceID 308

Hostname and DeviceID 309

Hostname, DeviceID, and ConfigID 309

Automated CNS Configuration 309

How to Configure the Configuration Engine 310

Enabling the CNS Event Agent 310

Refreshing DeviceIDs 312

Monitoring CNS Configurations 314

Additional References 315

Feature History and Information for the Configuration Engine 316

Configuring the Cisco Discovery Protocol 317

CHAPTER 21

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Finding Feature Information 317

Information About CDP 317

Cisco Discovery Protocol Overview 317

Default Cisco Discovery Protocol Configuration 318

How to Configure CDP 318

Configuring Cisco Discovery Protocol Characteristics 318

Disabling Cisco Discovery Protocol 320

Enabling Cisco Discovery Protocol 322

Disabling Cisco Discovery Protocol on an Interface 323

Enabling Cisco Discovery Protocol on an Interface 325

Monitoring and Maintaining Cisco Discovery Protocol 326

Additional References 327

Feature History and Information for Cisco Discovery Protocol 328

Configuring Simple Network Management Protocol 329

CHAPTER 22

Prerequisites for SNMP 329

Restrictions for SNMP 331

Information About SNMP 331

SNMP Overview 331

SNMP Manager Functions 332

SNMP Agent Functions 332

SNMP Community Strings 333

SNMP MIB Variables Access 333

SNMP Notifications 333

SNMP ifIndex MIB Object Values 334

Default SNMP Configuration 334

SNMP Configuration Guidelines 335

How to Configure SNMP 336

Disabling the SNMP Agent 336

Configuring Community Strings 337

Configuring SNMP Groups and Users 339

Configuring SNMP Notifications 342

Setting the Agent Contact and Location Information 347

Limiting TFTP Servers Used Through SNMP 348

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Monitoring SNMP Status 350

SNMP Examples 350

Additional References 351

Feature History and Information for Simple Network Management Protocol 352

Configuring SPAN 353

CHAPTER 23

Finding Feature Information 353

Restrictions for SPAN 353

Information About SPAN 354

SPAN 354

Local SPAN 354

SPAN Concepts and Terminology 355

SPAN Interaction with Other Features 358

Default SPAN Configuration 359

Configuration Guidelines 359

SPAN Configuration Guidelines 359

How to Configure SPAN 359

Creating a Local SPAN Session 359

Creating a Local SPAN Session and Configuring Incoming Traffic 361

Monitoring SPAN Operations 363

SPAN Configuration Examples 364

Example: Configuring Local SPAN 364

Examples: Creating an RSPAN VLAN 365

Feature History and Information for SPAN 366

Network Powered Lighting 367

PART VI

Configuring COAP Proxy Server 369

CHAPTER 24

Finding Feature Information 369

Information About the COAP Proxy Server 369

Restrictions for the COAP Proxy Server 370

How to Configure the COAP Proxy Server 370

Configuring the COAP Proxy 370

Configuring COAP Endpoints 373

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Monitoring COAP Proxy Server 374

Examples: Configuring the COAP Proxy Server 375

Configuring Auto SmartPorts 381

CHAPTER 25

Finding Feature Information 381

Information about Auto SmartPorts 381

Auto SmartPort Macros 382

Commands executed by CISCO_LIGHT_AUTO_SMARTPORT 382

Enabling Auto SmartPort 383

Configuring Mapping Between Event Triggers and Built-in Macros 384

Example: Enabling Auto SmartPorts 386

Example: Configuring Mapping Between Event Triggers and Built-in Macros 386

Configuring 2-event Classification 387

CHAPTER 26

Information about 2-event Classification 387

Configuring 2-event Classification 387

Example: Configuring 2-Event Classification 388

Configuring Power over Ethernet 389

CHAPTER 27

Finding Feature Information 389

Information About PoE 389

Power over Ethernet Ports 389

Supported Protocols and Standards 389

Powered-Device Detection and Initial Power Allocation 390

Power Management Modes 391

Fast POE 394

Perpetual POE 395

Cisco Universal Power Over Ethernet 395

Fast UPOE and Perpetual UPOE 395

Configuring Deep Sleep 395

How to Configure PoE 396

Configuring a Power Management Mode on a PoE Port 396

Configuring Power Policing 398

Configuring Fast PoE 400

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How to Configure Deep Sleep 401

Configuring the Switch to Enter Deep Sleep Mode 401

Configuring the Switch to Wake Up From Deep Sleep Mode 403

Monitoring Power Status 404

Configuration Examples for Configuring PoE 404

Budgeting Power: Example 404

Example: Configuring Perpetual PoE 405

Frequently Asked Questions 407

CHAPTER 28

Finding Feature Information 407

Frequently Asked Questions 407

EnergyWise 411

PART VII

Configuring EnergyWise 413

CHAPTER 29

Finding Feature Information 413

Prerequisites for Configuring EnergyWise 413

Prerequisites for Wake on LAN 413

Restrictions for Configuring EnergyWise 414

Information About Configuring EnergyWise 414

Cisco EnergyWise Network 414

EnergyWise Domain 415

Power Level Energy Management 416

Attributes 417

Security 418

Recurrences 418

Time Format and Time Zone 419

Day of the Month and Day of the Week Recurrences 419

Queries 420

Activity Check 421

Wake on LAN 422

WoL with Cisco EnergyWise 422

Configuration Guidelines 422

Enabling Cisco EnergyWise and Powering Devices 422

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Cisco IOS SOFTWARE RELEASE 15.2(3)E , Catalyst CDB-8P Switch , Catalyst CDB-8U Switch , Catalyst Digital Building Series Switches, IOS 15.2 E, IOS Software Release 15.2(1)E Configuration Guide

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