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Cisco Systems N3KC3048TP1GE manual Verifying MST Configurations, Restarts MST on entire switch or

Models: N3KC3064TFAL3 N3KC3048TP1GE

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Configuring Multiple Spanning Tree

Verifying MST Configurations

Procedure

	Command or Action	Purpose
Step 1	switch# clear spanning-tree detected-protocol	Restarts MST on entire switch or
	[interface interface [interface-num port-channel]]	specified interfaces.

This example shows how to restart MST on the Ethernet interface on slot 2, port 8:

switch# clear spanning-tree detected-protocol interface ethernet 2/8

Verifying MST Configurations

To display MST configuration information, perform one of the following tasks:

Command

Purpose

switch# show running-config spanning-tree [all]

switch# show spanning-tree mst [options]

Displays the current spanning tree configuration.

Displays detailed information for the current MST configuration.

The following example shows how to display current MST configuration:

switch# show spanning-tree mst configuration

%Switch is not in mst mode

Name [mist-attempt]

Revision 1 Instances configured 2 Instance Vlans mapped

-------- ---------------------------------------------------------------------

01-12,14-41,43-4094

113,42

	Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
112	OL-26590-01

Image 126

Cisco Systems N3KC3048TP1GE Verifying MST Configurations, Restarts MST on entire switch or, Specified interfaces, Command

Contents

Americas Headquarters First Published February 29 Last Modified March 22Page N T E N T S Configuring VLANs Configuring Private VLANs Configuring Rapid PVST+ Configuring Multiple Spanning Tree Configuring the Port Priority Configuring Lldp Configuring Igmp Snooping Document Conventions PrefaceAudience Convention DescriptionItalic screen font Error and System Messages Installation and Upgrade GuidesConfiguration Guides Release NotesObtaining Documentation and Submitting a Service Request New and Changed Information for this Release Feature Description Added orSwitching mode. There are two switching Changed ReleaseOL-26590-01 VLANs Layer 2 Ethernet Switching OverviewOverview This chapter contains the following sectionsPrivate VLANs Spanning TreeSTP Overview Rapid PVST+ STP ExtensionsOverview STP Extensions Configuring Ethernet Interfaces About the Interface CommandInformation About Ethernet Interfaces About the Unidirectional Link Detection Parameter Feature Default Udld ConfigurationFollowing table shows the default Udld configuration Udld Aggressive and Nonaggressive ModesFollowing table shows the default CDP configuration About the Error-Disabled StateDefault CDP Configuration About Interface SpeedAbout MTU Configuration Configuring Ethernet InterfacesAbout the Debounce Timer Parameters About Port ProfilesSwitch# configure terminal Configuring the Udld ModeCommand or Action Purpose Step AggressiveRunning-config bootflash Changing an Interface Port ModeCommand or Action Running-config startup-configConfiguring Interface Speed Slot /portTransceiver inserted into it Command or Action Purpose Disabling Link NegotiationDevice-id mac-address Configuring the CDP CharacteristicsAdvertise v1 Serial-number system-nameEnabling or Disabling CDP SecondsEnabling the Error-Disabled Detection ExampleConfig t Enters configuration mode Enabling the Error-Disabled RecoveryConfiguring the Error-Disabled Recovery Interval Copy running-config startup-configErrdisable recovery interval interval Configuring the Debounce TimerConfiguring the Description Parameter Show interface status err-disabledSwitchconfig-if# shutdown Disables the interface Displaying Interface InformationDisabling and Restarting Ethernet Interfaces Command Purpose Following example shows how to display the CDP neighbors Displaying Input Packet Discard InformationDefault Physical Ethernet Settings Parameter Default SettingPage OL-26590-01 Configuring VLANs Information About VLANsUnderstanding VLANs Vlan Ranges VLANs as Logically Defined NetworksCreating, Deleting, and Modifying VLANs VLANs Numbers Range UsageCreating and Deleting a Vlan Configuring a VlanAbout the Vlan Trunking Protocol Guidelines and Limitations for VTPConfiguring a Vlan Vlan-id vlan-rangeVlan vlan-id vlan-range Switchconfig# interface ethernet Adding Ports to a VlanActive suspend Configure terminal Enters global configuration mode Configuring a Vlan as a Routed SVISwitchconfig-if# switchport access vlan Feature interface-vlan Enables the creation of SVIsConfiguring a Vlan as a Management SVI Configuring VTPYou can configure routing protocols on this interface Copy running-config Vtp passwordShow vtp password Startup-configSwitch# show vlan brief id vlanid vlanrange name name Verifying Vlan ConfigurationSwitch# show running-config vlan vlanid vlanrange SummaryConfiguring Private VLANs Information About Private VLANsPrimary and Secondary VLANs in Private VLANs Private Vlan PortsThree types of Pvlan ports are as follows Primary, Isolated, and Community Private VLANs Associating Primary and Secondary VLANs Private Vlan Traffic FlowsBroadcast Traffic in Private VLANs Private Vlan Promiscuous TrunksPrivate Vlan Isolated Trunks Private Vlan Port IsolationGuidelines and Limitations for Private VLANs Configuring a Private VlanSwitchconfig# feature private-vlan Enabling Private VLANsConfiguring a Vlan as a Private Vlan Associating Secondary VLANs with a Primary Private VlanCommunity isolated primary Association add secondary-vlan-list Remove secondary-vlan-listAssociation Configuring an Interface as a Private Vlan Host Port Configuring an Interface as a Private Vlan Promiscuous PortConfiguring a Promiscuous Trunk Port Configuring an Isolated Trunk PortConfiguring the Allowed VLANs for Pvlan Trunking Ports Switch# show feature Verifying the Private Vlan ConfigurationConfiguring Native 802.1Q VLANs on Private VLANs Switch# show interface switchportOL-26590-01 Configuring Access and Trunk Interfaces Information About Access and Trunk InterfacesUnderstanding Access and Trunk Interfaces Understanding Ieee 802.1Q Encapsulation Devices in a Trunking EnvironmentUnderstanding Access VLANs Header without and with 802.1Q Tag IncludedUnderstanding the Native Vlan ID for Trunk Ports Understanding Allowed VLANsUnderstanding Native 802.1Q VLANs Configuring Access and Trunk Interfaces Configuring a LAN Interface as an Ethernet Access PortSwitchconfig-if# switchport host Configuring Access Host PortsConfiguring Trunk Ports On bpdu filtering and bpdu guardSpecified trunk, use the switchport trunk allowed vlan Configuring the Native Vlan for 802.1Q Trunking PortsConfiguring the Allowed VLANs for Trunking Ports Port-channel numberConfiguring Native 802.1Q VLANs Switch# configure terminal Enters configuration modeSwitch# show vlan dot1q tag native Verifying Interface ConfigurationSwitchconfig# no vlan dot1q tag Switch# show interfaceOL-26590-01 Cut-Through Switching Mode Configuring Switching ModesInformation About Switching Modes Store-and-Forward Switching ModeCut-Through Switching Mode Guidelines and Limitations Guidelines and Limitations for Switching ModesLicensing Requirements for Switching Modes Store-and-Forward Switching Mode Guidelines and LimitationsEnabling Store-and-Forward Switching Default Settings for Switching ModesConfiguring Switching Modes Reenabling Cut-Through SwitchingThis example shows how to reenable cut-through switching Feature History for Switching ModesSaves the change persistently through reboots Feature Name Releases InformationUnderstanding STP Configuring Rapid PVST+Information About Rapid PVST+ STP OverviewUnderstanding How a Topology is Created Understanding the Bridge IDBit Bit extended system ID field is part of the bridge IDBridge Priority Value 8192 4096 2048 1024 512 256 128Understanding BPDUs Election of the Root Bridge Creating the Spanning Tree TopologyUnderstanding Rapid PVST+ Rapid PVST+ OverviewRapid PVST+ BPDUs Rapid PVST+ Flag Byte in BpduProposal and Agreement Handshake Proposal and Agreement Handshaking for Rapid ConvergenceProtocol Timers Port RolesVariable Description Port States Rapid PVST+ Port State OverviewBlocking State Operational Status Port State Enabled Blocking Learning Yes Forwarding DisabledSynchronization of Port Roles Topology?Processing Superior Bpdu Information Spanning-Tree Dispute Mechanism Port CostPort Priority Rapid PVST+ and Ieee 802.1Q TrunksRapid PVST+ Interoperation with Legacy 802.1D STP BandwidthConfiguring Rapid PVST+ Rapid PVST+ Interoperation with 802.1s MSTEnabling Rapid PVST+ Enabling Rapid PVST+ per Vlan Mode rapid-pvstSwitch# configure TerminalConfiguring the Root Bridge ID Configuring a Secondary Root Bridge Spanning-tree mst max-ageconfiguration commandsConfiguring the Rapid PVST+ Port Priority Vlan vlan-list port-priority priorityPathcost method long short Configuring the Rapid PVST+ Pathcost Method and Port CostConfiguring the Rapid PVST+ Bridge Priority of a Vlan Vlan vlan-id cost value autoConfiguring the Rapid PVST+ Hello Time for a Vlan Switchconfig# spanning-tree vlanVlan-range hello-time hello-time Specifying the Link Type Configuring the Rapid PVST+ Forward Delay Time for a VlanConfiguring the Rapid PVST+ Maximum Age Time for a Vlan Vlan-range forward-time forward-timeSwitch# show running-config spanning-tree all Verifying Rapid PVST+ ConfigurationsSwitch# clear spanning-tree detected-protocol Restarting the ProtocolSwitch# show spanning-tree options Spanning tree configurationThis example shows how to display spanning tree status OL-26590-01 Configuring Multiple Spanning Tree Information About MSTMST Overview MST Regions MST BPDUsMST Configuration Information IST, CIST, and CSTIST, CIST, and CST Overview Spanning Tree Operation Within an MST Region Spanning Tree Operations Between MST RegionsMST Terminology MST Regions, Cist Regional Roots, and CST RootHop Count Boundary PortsSpanning-Tree Dispute Mechanism MST Boundary PortsPort Cost and Port Priority Interoperability with Ieee 802.1DYou must enable MST Rapid PVST+ is the default Configuring MSTMST Configuration Guidelines Enabling MSTSwitchconfig# no spanning-tree mode mst Entering MST Configuration ModeSwitchconfig# spanning-tree mode mst Mst configurationSwitchconfig# spanning-tree mst Specifying the MST NameSpanning-tree mst Specifying the MST Configuration Revision Number Specifying the Configuration on an MST RegionInstance-id vlan vlan-range Name VersionDefault MSTI, which is the Cist This example shows how to map Vlan 200 to MstiMapping and Unmapping VLANs to MST Instances Same Msti and their associated primary Vlan Configuring the Root BridgeSynchronize For all private VLANs104 Configuring the Port Priority Switchconfig# no spanning-tree OptionalMst instance-id root Configuring the Port Cost Configuring the Switch PriorityConfiguring the Hello Time Configures the hello time for all MST instances. The helloHello-time seconds Configuring the Forwarding-Delay Time Configuring the Maximum-Aging TimeSwitch is alive. For seconds, the range is from 1 to 10, Mst max-age seconds Configuring the Maximum-Hop CountConfiguring Pvst Simulation Globally Max-hops hop-countConfiguring Pvst Simulation Per Port Switchconfig-if#spanning-tree mst simulate pvst disable Command Verifying MST ConfigurationsRestarts MST on entire switch or Specified interfacesInformation About STP Extensions Configuring STP ExtensionsAbout STP Extensions Understanding STP Port TypesUnderstanding Bridge Assurance Understanding Bpdu GuardUnderstanding Bpdu Filtering Is disabledDefault Enable Disable Enabled/Disabled Port returns toUnderstanding Loop Guard Understanding Root GuardConfiguring STP Extensions STP Extensions Configuration GuidelinesConfiguring Spanning Tree Port Types Globally Port type edge default Port type network defaultPort type edge Switchconfig# interface typeSwitchconfig-if# spanning-tree Edge ports. Edge ports immediately transition toPorts. If you enable Bridge Assurance, it automatically Enabling Bpdu Guard GloballyPort type network Enabling Bpdu Guard on Specified Interfaces Edge bpdufilter default Switchconfig-if# no spanning-tree bpduguardEnables Bpdu Filtering by default on all Filtering is disabled by defaultBpdufilter enable disable Enabling Bpdu Filtering on Specified InterfacesBpdufilter Guard is disabled Loopguard defaultNormal and network ports. By default, global Loop Enabling Loop Guard GloballyVerifying STP Extension Configuration Guard loop root none126 Configuring Lldp Configuring Global Lldp CommandsEnsure that the Lldp feature is enabled on the switch Holdtime reinit timerOptionalswitch# show lldp Displays Lldp configurations Configuring Interface Lldp Commands TransmitThis example shows how to display Lldp timer information This example shows how to display Lldp countersConfiguring a Static MAC Address Configuring the MAC Address TableConfiguring MAC Addresses Information About MAC AddressesSwitch# configure terminal Enters global configuration mode Configuring the Aging Time for the MAC TableSwitchconfig-# no mac-address-table static Macaddress vlan vlan-idSwitch# show mac-address-table aging-time Verifying the MAC Address ConfigurationSwitchconfig# clear mac-address-table dynamic Defined in the switchThis example shows how to display the MAC address table This example shows how to display the current aging timeConfiguring Igmp Snooping Information About Igmp SnoopingIgmp Snooping Switch IGMPv1 and IGMPv2IGMPv3 Igmp Snooping QuerierIgmp Forwarding Configuring Igmp Snooping Parameters Parameter DescriptionNo ip igmp snooping mrouter vpc-peer-link No ip igmp snooping mrouterSnooping Last-member-query-interval Snooping explicit-trackingSnooping fast-leave Snooping querier IP-addressVerifying Igmp Snooping Configuration 141142 Configuring Traffic Storm Control Information About Traffic Storm ControlTraffic Storm Guidelines and Limitations Broadcast SuppressionConfigures traffic storm control for traffic Configuring Traffic Storm ControlSwitchconfig-if# storm-control broadcast On the interface. The default state isVerifying Traffic Storm Control Configuration Traffic Storm Control Example ConfigurationDefault Traffic Storm Settings Parameters DefaultD E Mstp Cist root 93 CIST, described 91 CST 91 Rstp 68, 71, 75, 89 active topology 71 Bpdu Adding ports to Private Configuring VLANs