Cisco Nexus 6000 User manual

Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration
Guide, Release 7.x
First Published: 2014-01-15
Last Modified: 2016-01-28
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CONTENTS
Preface Preface xiii
Audience xiii
Document Conventions xiii
Related Documentation for Cisco Nexus 6000 Series NX-OS Software xv
Documentation Feedback xvi
Obtaining Documentation and Submitting a Service Request xvii
CHAPTER 1 New and Changed Information 1
New and Changed Information 1
CHAPTER 2 Overview 3
Layer 2 Ethernet Switching Overview 3
VLANs 3
Private VLANs 4
Spanning Tree 4
STP Overview 4
Rapid PVST+ 5
MST 5
STP Extensions 5
CHAPTER 3 Configuring VLANs 7
Information About VLANs 7
Understanding VLANs 7
Understanding VLAN Ranges 8
Creating, Deleting, and Modifying VLANs 9
About the VLAN Trunking Protocol 10
Guidelines and Limitations for VTP 10
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About VLAN Translation 11
Guidelines and Limitations for Configuring VLANs 13
Configuring a VLAN 15
Creating and Deleting a VLAN 15
Configuring VLAN Long-Name 16
Changing the Range of Reserved VLANs 17
Configuring a VLAN 19
Adding Ports to a VLAN 20
Configuring VTP 20
Configuring VLAN Translation on a Trunk Port 22
Configuring VLAN Translation with a FEX 23
Verifying the VLAN Configuration 25
Feature History for Configuring VLANs 25
CHAPTER 4 Configuring Private VLANs 27
Guidelines and Limitations for Private VLANs 27
Information About Private VLANs 28
Primary and Secondary VLANs in Private VLANs 28
Associating Secondary VLANs with a Primary Private VLAN 29
Private VLAN Ports 30
Primary, Isolated, and Community Private VLANs 31
Associating Primary and Secondary VLANs 32
Private VLAN Promiscuous Trunks 33
Private VLAN Isolated Trunks 33
Broadcast Traffic in Private VLANs 34
Private VLAN Port Isolation 34
Configuring a Private VLAN 34
Enabling Private VLANs 34
Configuring a VLAN as a Private VLAN 35
Configuring an Interface as a Private VLAN Host Port 36
Configuring an Interface as a Private VLAN Promiscuous Port 37
Configuring a Promiscuous Trunk Port 38
Configuring an Isolated Trunk Port 39
Configuring the Allowed VLANs for PVLAN Trunking Ports 40
Configuring Native 802.1Q VLANs on Private VLANs 41
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Verifying the Private VLAN Configuration 42
CHAPTER 5 Configuring Rapid PVST+ 43
Information About Rapid PVST+ 43
Understanding STP 43
STP Overview 43
Understanding How a Topology is Created 44
Understanding the Bridge ID 44
Bridge Priority Value 44
Extended System ID 45
STP MAC Address Allocation 45
Understanding BPDUs 46
Election of the Root Bridge 47
Creating the Spanning Tree Topology 47
Understanding Rapid PVST+ 48
Rapid PVST+ Overview 48
Rapid PVST+ BPDUs 49
Proposal and Agreement Handshake 50
Protocol Timers 51
Port Roles 51
Port States 52
Rapid PVST+ Port State Overview 52
Blocking State 53
Learning State 53
Forwarding State 53
Disabled State 54
Summary of Port States 54
Synchronization of Port Roles 54
Processing Superior BPDU Information 55
Processing Inferior BPDU Information 56
Spanning-Tree Dispute Mechanism 56
Port Cost 56
Port Priority 57
Rapid PVST+ and IEEE 802.1Q Trunks 57
Rapid PVST+ Interoperation with Legacy 802.1D STP 57
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Rapid PVST+ Interoperation with 802.1s MST 58
Configuring Rapid PVST+ 58
Enabling Rapid PVST+ 58
Enabling Rapid PVST+ per VLAN 59
Configuring the Root Bridge ID 60
Configuring a Secondary Root Bridge 61
Configuring the Rapid PVST+ Port Priority 62
Configuring the Rapid PVST+ Path-Cost Method and Port Cost 63
Configuring the Rapid PVST+ Bridge Priority of a VLAN 63
Configuring the Rapid PVST+ Hello Time for a VLAN 64
Configuring the Rapid PVST+ Forward Delay Time for a VLAN 65
Configuring the Rapid PVST+ Maximum Age Time for a VLAN 65
Specifying the Link Type 65
Restarting the Protocol 66
Verifying the Rapid PVST+ Configuration 66
CHAPTER 6 Configuring Multiple Spanning Tree 69
Information About MST 69
MST Overview 69
MST Regions 70
MST BPDUs 70
MST Configuration Information 71
IST, CIST, and CST 71
IST, CIST, and CST Overview 71
Spanning Tree Operation Within an MST Region 72
Spanning Tree Operations Between MST Regions 72
MST Terminology 73
Hop Count 74
Boundary Ports 74
Spanning-Tree Dispute Mechanism 75
Port Cost and Port Priority 76
Interoperability with IEEE 802.1D 76
Interoperability with Rapid PVST+: Understanding PVST Simulation 77
Configuring MST 77
MST Configuration Guidelines 77
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Enabling MST 77
Entering MST Configuration Mode 78
Specifying the MST Name 79
Specifying the MST Configuration Revision Number 80
Specifying the Configuration on an MST Region 80
Mapping and Unmapping VLANs to MST Instances 82
Mapping Secondary VLANs to Same MSTI as Primary VLANs for Private VLANs 82
Configuring the Root Bridge 83
Configuring a Secondary Root Bridge 84
Configuring the Port Priority 85
Configuring the Port Cost 86
Configuring the Switch Priority 86
Configuring the Hello Time 87
Configuring the Forwarding-Delay Time 88
Configuring the Maximum-Aging Time 88
Configuring the Maximum-Hop Count 89
Configuring PVST Simulation Globally 89
Configuring PVST Simulation Per Port 90
Specifying the Link Type 91
Restarting the Protocol 92
Verifying the MST Configuration 92
CHAPTER 7 Configuring STP Extensions 93
Overview 93
Information About STP Extensions 93
Understanding STP Port Types 93
Spanning Tree Edge Ports 93
Spanning Tree Network Ports 94
Spanning Tree Normal Ports 94
Understanding Bridge Assurance 94
Understanding BPDU Guard 94
Understanding BPDU Filtering 95
Understanding Loop Guard 96
Understanding Root Guard 97
Configuring STP Extensions 97
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STP Extensions Configuration Guidelines 97
Configuring Spanning Tree Port Types Globally 97
Configuring Spanning Tree Edge Ports on Specified Interfaces 98
Configuring Spanning Tree Network Ports on Specified Interfaces 99
Enabling BPDU Guard Globally 100
Enabling BPDU Guard on Specified Interfaces 101
Enabling BPDU Filtering Globally 102
Enabling BPDU Filtering on Specified Interfaces 103
Enabling Loop Guard Globally 104
Enabling Loop Guard or Root Guard on Specified Interfaces 105
Configuring FEX Port Spanning Tree BPDU Transmit Interval 105
Verifying the STP Extension Configuration 106
CHAPTER 8 Configuring LLDP 107
Configuring LLDP 107
Configuring Interface LLDP 108
CHAPTER 9 Configuring MAC Address Tables 111
Information About MAC Addresses 111
RMAC Learning 111
Configuring MAC Addresses 112
Configuring Static MAC Addresses 112
Configuring the Aging Time for the MAC Table 112
Configuring MAC Move Loop Detection 113
Clearing Dynamic Addresses from the MAC Table 114
Enabling RMAC Learning Feature 114
Verifying the MAC Address Configuration 114
Verifying RMAC Learning Feature 115
CHAPTER 10 Configuring IGMP Snooping 117
Information About IGMP Snooping 117
IGMPv1 and IGMPv2 118
IGMPv3 118
IGMP Snooping Querier 119
IGMP Forwarding 119
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Configuring IGMP Snooping Parameters 120
Verifying the IGMP Snooping Configuration 122
CHAPTER 11 Configuring MVR 125
Information About MVR 125
MVR Overview 125
MVR Interoperation with Other Features 126
Licensing Requirements for MVR 126
Guidelines and Limitations for MVR 126
Default MVR Settings 127
Configuring MVR 127
Configuring MVR Global Parameters 127
Configuring MVR Interfaces 129
Verifying the MVR Configuration 130
CHAPTER 12 Configuring VTP V3 133
Configuring VTP V3 133
VTP V3 Overview 133
Guidelines and Limitation 133
VTP V3 Modes 134
VTP V3 Pruning 135
VTP V3 Per Interface 135
VTP V3 Pruning and Spanning Tree Protocol 135
Default VTP Settings 135
Configuring VTP V3 136
Configuring VTP V3 Pruning 138
CHAPTER 13 Configuring Traffic Storm Control 141
Information About Traffic Storm Control 141
Guidelines and Limitations for Traffic Storm Control 143
Configuring Traffic Storm Control 143
Verifying the Traffic Storm Control Configuration 144
Traffic Storm Control Example Configuration 144
Default Settings for Traffic Storm Control 145
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CHAPTER 14 Configuring the Fabric Extender 147
Information About the Cisco Nexus 2000 Series Fabric Extender 148
Fabric Extender Terminology 149
Fabric Extender Features 149
Layer 2 Host Interfaces 150
Host Port Channel 150
VLANs and Private VLANs 151
Virtual Port Channels 151
Fibre Channel over Ethernet Support 153
Protocol Offload 153
Quality of Service 153
Access Control Lists 154
IGMP Snooping 154
Switched Port Analyzer 154
Fabric Interface Features 154
Oversubscription 155
Management Model 156
Forwarding Model 157
Connection Model 157
Static Pinning Fabric Interface Connection 158
Port Channel Fabric Interface Connection 159
Port Numbering Convention 160
Fabric Extender Image Management 160
Fabric Extender Hardware 160
Chassis 161
Ethernet Interfaces 161
Speed and Duplex Mode 162
Example: Configuring the Interface Speed Parameters 164
Associating a Fabric Extender to a Fabric Interface 165
Associating a Fabric Extender to an Ethernet Interface 165
Associating a Fabric Extender to a Port Channel 166
Disassociating a Fabric Extender from an Interface 168
Configuring Fabric Extender Global Features 168
Enabling the Fabric Extender Locator LED 170
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