BenutzerhandbuchInhaltsverzeichnisCisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)1Contents3Preface11Audience11Document Conventions11Related Documentation for Nexus 3000 Series NX-OS Software12Obtaining Documentation and Submitting a Service Request14New and Changed Information for this Release15New and Changed Information for this Release15Overview17Layer 2 Ethernet Switching Overview17VLANs17Private VLANs18Spanning Tree18STP Overview18Rapid PVST+19MST19STP Extensions19Configuring Ethernet Interfaces21Information About Ethernet Interfaces21About the Interface Command21About the Unidirectional Link Detection Parameter22Default UDLD Configuration23UDLD Aggressive and Nonaggressive Modes23About Interface Speed24About the Cisco Discovery Protocol24Default CDP Configuration24About the Error-Disabled State24About Port Profiles25Guidelines and Limitations for Port Profiles25About the Debounce Timer Parameters25About MTU Configuration25Configuring Ethernet Interfaces25Configuring the UDLD Mode26Changing an Interface Port Mode27Configuring Interface Speed28Disabling Link Negotiation29Configuring the CDP Characteristics30Enabling or Disabling CDP31Enabling the Error-Disabled Detection32Enabling the Error-Disabled Recovery33Configuring the Error-Disabled Recovery Interval33Configuring the Debounce Timer34Configuring the Description Parameter34Disabling and Restarting Ethernet Interfaces35Displaying Interface Information35Displaying Input Packet Discard Information37Default Physical Ethernet Settings38Configuring VLANs41Information About VLANs41Understanding VLANs41VLAN Ranges42Creating, Deleting, and Modifying VLANs43About the VLAN Trunking Protocol44Guidelines and Limitations for VTP44Configuring a VLAN44Creating and Deleting a VLAN44Configuring a VLAN45Adding Ports to a VLAN46Configuring a VLAN as a Routed SVI47Configuring a VLAN as a Management SVI48Configuring VTP48Verifying VLAN Configuration50Configuring Private VLANs51Information About Private VLANs51Primary and Secondary VLANs in Private VLANs52Private VLAN Ports52Primary, Isolated, and Community Private VLANs53Associating Primary and Secondary VLANs54Private VLAN Promiscuous Trunks55Private VLAN Isolated Trunks55Broadcast Traffic in Private VLANs55Private VLAN Port Isolation55Guidelines and Limitations for Private VLANs56Configuring a Private VLAN56Enabling Private VLANs56Configuring a VLAN as a Private VLAN57Associating Secondary VLANs with a Primary Private VLAN57Configuring an Interface as a Private VLAN Host Port59Configuring an Interface as a Private VLAN Promiscuous Port59Configuring a Promiscuous Trunk Port60Configuring an Isolated Trunk Port60Configuring the Allowed VLANs for PVLAN Trunking Ports60Configuring Native 802.1Q VLANs on Private VLANs61Verifying the Private VLAN Configuration61Configuring Access and Trunk Interfaces63Information About Access and Trunk Interfaces63Understanding Access and Trunk Interfaces63Understanding IEEE 802.1Q Encapsulation64Understanding Access VLANs65Understanding the Native VLAN ID for Trunk Ports66Understanding Allowed VLANs66Understanding Native 802.1Q VLANs66Configuring Access and Trunk Interfaces67Configuring a LAN Interface as an Ethernet Access Port67Configuring Access Host Ports68Configuring Trunk Ports68Configuring the Native VLAN for 802.1Q Trunking Ports69Configuring the Allowed VLANs for Trunking Ports69Configuring Native 802.1Q VLANs70Verifying Interface Configuration71Configuring Switching Modes73Information About Switching Modes73Guidelines and Limitations for Switching Modes74Licensing Requirements for Switching Modes74Default Settings for Switching Modes75Configuring Switching Modes75Enabling Store-and-Forward Switching75Reenabling Cut-Through Switching75Feature History for Switching Modes76Configuring Rapid PVST+77Information About Rapid PVST+77Understanding STP77STP Overview77Understanding How a Topology is Created78Understanding the Bridge ID78Bridge Priority Value78Extended System ID79STP MAC Address Allocation79Understanding BPDUs80Election of the Root Bridge81Creating the Spanning Tree Topology81Understanding Rapid PVST+82Rapid PVST+ Overview82Rapid PVST+ BPDUs83Proposal and Agreement Handshake84Protocol Timers85Port Roles85Port States86Rapid PVST+ Port State Overview86Blocking State87Learning State87Forwarding State87Disabled State88Summary of Port States88Synchronization of Port Roles88Processing Superior BPDU Information89Processing Inferior BPDU Information90Spanning-Tree Dispute Mechanism90Port Cost90Port Priority91Rapid PVST+ and IEEE 802.1Q Trunks91Rapid PVST+ Interoperation with Legacy 802.1D STP91Rapid PVST+ Interoperation with 802.1s MST92Configuring Rapid PVST+92Enabling Rapid PVST+92Enabling Rapid PVST+ per VLAN93Configuring the Root Bridge ID94Configuring a Secondary Root Bridge95Configuring the Rapid PVST+ Port Priority96Configuring the Rapid PVST+ Pathcost Method and Port Cost97Configuring the Rapid PVST+ Bridge Priority of a VLAN97Configuring the Rapid PVST+ Hello Time for a VLAN98Configuring the Rapid PVST+ Forward Delay Time for a VLAN99Configuring the Rapid PVST+ Maximum Age Time for a VLAN99Specifying the Link Type99Restarting the Protocol100Verifying Rapid PVST+ Configurations100Configuring Multiple Spanning Tree103Information About MST103MST Overview103MST Regions104MST BPDUs104MST Configuration Information105IST, CIST, and CST105IST, CIST, and CST Overview105Spanning Tree Operation Within an MST Region106Spanning Tree Operations Between MST Regions106MST Terminology107Hop Count108Boundary Ports108Spanning-Tree Dispute Mechanism109Port Cost and Port Priority110Interoperability with IEEE 802.1D110Interoperability with Rapid PVST+: Understanding PVST Simulation111Configuring MST111MST Configuration Guidelines111Enabling MST111Entering MST Configuration Mode112Specifying the MST Name113Specifying the MST Configuration Revision Number114Specifying the Configuration on an MST Region114Mapping and Unmapping VLANs to MST Instances116Mapping Secondary VLANs to Same MSTI as Primary VLANs for Private VLANs116Configuring the Root Bridge117Configuring a Secondary Root Bridge118Configuring the Port Priority119Configuring the Port Cost120Configuring the Switch Priority120Configuring the Hello Time121Configuring the Forwarding-Delay Time122Configuring the Maximum-Aging Time122Configuring the Maximum-Hop Count123Configuring PVST Simulation Globally123Configuring PVST Simulation Per Port124Specifying the Link Type125Restarting the Protocol125Verifying MST Configurations126Configuring STP Extensions127About STP Extensions127Information About STP Extensions127Understanding STP Port Types127Spanning Tree Edge Ports127Spanning Tree Network Ports128Spanning Tree Normal Ports128Understanding Bridge Assurance128Understanding BPDU Guard128Understanding BPDU Filtering129Understanding Loop Guard130Understanding Root Guard130Configuring STP Extensions131STP Extensions Configuration Guidelines131Configuring Spanning Tree Port Types Globally131Configuring Spanning Tree Edge Ports on Specified Interfaces132Configuring Spanning Tree Network Ports on Specified Interfaces133Enabling BPDU Guard Globally134Enabling BPDU Guard on Specified Interfaces135Enabling BPDU Filtering Globally136Enabling BPDU Filtering on Specified Interfaces137Enabling Loop Guard Globally138Enabling Loop Guard or Root Guard on Specified Interfaces138Verifying STP Extension Configuration139Configuring LLDP141Configuring Global LLDP Commands141Configuring Interface LLDP Commands143Configuring the MAC Address Table145Information About MAC Addresses145Configuring MAC Addresses145Configuring a Static MAC Address145Configuring the Aging Time for the MAC Table146Clearing Dynamic Addresses from the MAC Table147Verifying the MAC Address Configuration147Configuring IGMP Snooping149Information About IGMP Snooping149IGMPv1 and IGMPv2150IGMPv3151IGMP Snooping Querier151IGMP Forwarding151Configuring IGMP Snooping Parameters152Verifying IGMP Snooping Configuration155Configuring Traffic Storm Control157Information About Traffic Storm Control157Traffic Storm Guidelines and Limitations158Configuring Traffic Storm Control159Verifying Traffic Storm Control Configuration160Traffic Storm Control Example Configuration160Default Traffic Storm Settings160INDEX161Größe: 3,57 MBSeiten: 164Language: EnglishHandbuch öffnen
