Trunking Misconfiguration Examples | Cisco Systems DSC9148D8G48PK9

Chapter 5 Configuring Trunking

Guidelines and Limitations

Receive B2B	Credit	is 32
Receive data field		Size is	2112
Beacon is turned off
Trunk vsans	(admin	allowed	and active) (1,100-101,1101,1163-1166,1216,2172,2
182-2183)
Trunk vsans	(up)		(1,2183)
Trunk vsans	(isolated)		()
Trunk vsans	(initializing)		(1101,1163-1166,1216,2172,2182)

Trunking Misconfiguration Examples

If you do not configure the VSANs correctly, issues with the connection may occur. For example, if you merge the traffic in two VSANs, both VSANs will be mismatched. The trunking protocol validates the VSAN interfaces at both ends of a link to avoid merging VSANs (see Figure 5-5).

Figure 5-5	VSAN Mismatch
Switch 1	Switch 2

	Isolated
E port	E port
VSAN 2	VSAN 3

VSAN mismatch

85471

The trunking protocol detects potential VSAN merging and isolates the ports involved (see Figure 5-5).

The trunking protocol cannot detect merging of VSANs when a third-party switch is placed in between two Cisco MDS 9000 Family switches (see Figure 5-6).

Figure 5-6 Third-Party Switch VSAN Mismatch

			Third-party switches
		VSAN 2				VSAN 3
		E port				E port
Switch 1				Switch 2			Switch 3

85472

VSAN 2 and VSAN 3 are effectively merged with overlapping entries in the name server and the zone applications. Cisco DCNM-SAN helps detect such topologies.

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
5-10	OL-29284-01, Release 6.x

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Cisco Systems DSC9148D8G48PK9 manual Trunking Misconfiguration Examples, Vsan Mismatch

Contents

Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide Americas HeadquartersPage N T E N T S TL Ports Specifying a Port Owner Configuring Fibre Channel Interfaces Information About Interface Buffers Default Settings Deleting an Interface from a PortChannel Verifying NPV Monitoring Ports in a Vsan Xii Port Monitor Configuring Port Added information about 22a Enhancements Monitor Policy Feature Port Monitor Port GuardThree new counters for the port Monitor command About This Guide Enhancements FlexAttachMonitoring Monitoring a selected port group Chapter Title Description AudienceOrganization Document Conventions Boldface font Related Documentation Command-Line Interface Troubleshooting and Reference Trunks and PortChannels Fibre Channel Port Rate Limiting FlexAttach Extended CreditsPort Virtualization Interfaces Overview FlexAttach OL-29284-01, Release Configuring Interfaces Information About Interfaces Interface Description Interface Modes NP Ports PortFL Port TF Port TL PortTE Port Auto Mode TNP PortSD Port ST Port Administrative States Interface StatesOperational States Reason Codes Reason Codes for Interface States Administrative Operational Configuration Status Reason CodeNone Reason Codes for Nonoperational States ApplicableReason Code long version Description Modes Graceful Shutdown Autosensing Port Administrative SpeedsFrame Encapsulation Bit Error Thresholds Cisco MDS 9000 Family Switch Interface ModesBeacon LEDs Speed LEDs SFP Transmitter Acronym Definitions SFP Transmitter TypesExtended transmitters assigned to Cisco-supported SFPs TL Ports CWDM-1590 CWDM-1610 C1590 C1610Translation from Translation to Example Supported TL Port Translations TL Port Alpa Caches Port Guard Port Monitor Threshold Interval Rising Falling Counter Type Seconds Event Local Switching Port Monitor Port GuardPort Group Monitor Rising Threshold Slow Drain Device Detection and Congestion Avoidance Management Interfaces Generation 1 Interface Configuration Guidelines Prerequisites for InterfacesGuidelines and Limitations Vsan Interfaces Private Loop Configuration Guidelines Vsan Interface Configuration Guidelines Default Settings Configuring Interfaces7lists the default settings for interface parameters Parameters Default Configuring Fibre Channel Interfaces Command Purpose Setting the Interface Administrative State Configuring Interface Modes Configuring System Default Port Mode F Sets the administrative mode of Fibre Channel ports toMode F if applicable Default unless user configured Configuring ISL between Two Switches Configuring 10-Gbps FC Mode Configuring Port Administrative Speeds Configuring Port Speed Group Configuring the Interface Description Configuring Beacon Mode Enters configuration modeInterface configuration submode Specifying a Port Owner Disabling Bit Error Threshold Configuring Switch Port Attribute Default Values Configuring TL Ports Configures manual entries into the Alpa cacheManually Inserting Entries into the Alpa Cache Clearing the Alpa Cache Configuring Port Guard Configuring Port Monitor To enable port monitor, follow these stepsEnables default port monitoring Disables port monitoring Configuring a Port Monitor Policy Specifies the delta protocol error poll interval Specifies the delta signal loss poll intervalReverts to the default policy for sync loss Reverts to the default policy for Tx performance Activating a Port Monitor Policy Configuring a Port Monitor Port GuardConfiguring Port Group Monitor Configuring a Port Group Monitor Policy Enabling Port Group Monitor Reverting to the Default Policy for a Specific Counter Turning Off the Monitoring of Specific Counter Configuring Management Interfaces Activating a Port Group Monitor Policy Creating Vsan Interfaces Configuring No-Credit Timeout Value Configuring Congestion Frame Timeout ValueConfiguring Stuck Frame Timeout Value Configuring Credit Loss Recovery Threshold and Action Specifies the no-credit timeout value and portMode for the switch Specifies the default no-credit timeout value port Verifying Interfaces Configuration Configuring Interfaces Verifying Interfaces Configuration Example 2-3 Displays All Interfaces Discards, 0 errorsDisplaying Interface Information Interface fc3/13 , fc3/16 Example 2-4 Displays Multiple, Specified InterfacesInterface fc1/1 5 , fc2/5 Frames/sec Switch# show interface fc2/2 fc2/2 is trunkingExample 2-5 Displays a Specific Interface Example 2-6 Displays Port Description Switch# show interface descriptionSwitch# show interface brief Switch# show interface counters fc3/1 Example 2-8 Displays Interface Counters Switch# show interface counters brief Example 2-9 Displays Interface Counters in Brief Format Switch# show running-config Example 2-10 Displays Transceiver Information Switch# show running-config interface fc1/1 System default switchport mode F interface fc4/1 Example 2-17 Displays the TL Ports in All VSANs Switch# show tlport listDisplaying TL Port Information Displaying the Alpa Cache Contents Displaying Port Monitor Status and Policies Switch# show port-monitor Port-monitor active Switch# show port-group-monitor status Displaying Port Group Monitor Status and Policies Switch# show port-group-monitor DefaultPgm1 Pgm2 Displaying Vsan Interface Information Displaying Management Interface ConfigurationSwitch# show interface mgmt 0 mgmt0 is up OL-29284-01, Release Generations of Modules and Switches Information About Fibre Channel Interfaces Generation 3 Fabric Switch Part Number Product Name and DescriptionBackplane crossbar bandwidth Any-to-any connectivity Generation 2 Fabric Switches Port GroupsMaximum Product Name Generation 3 Fabric Switches DS-C9148-K9 Port 8-Gbps Cisco MDS Fabric switchPart Number Description Per Port Group Gbps Generation 3 Modules Port Rate Modes Switches Supports Default Speed Product NameMode and Rate Dedicated Rate Mode Part Number Description Mode Mode on All PortsConfigured Speed Reserved Bandwidth Auto Gbps Auto with 4-Gbps maximum Shared Rate Mode Auto Gbps Auto with 2-Gbps maximum Dedicated Rate Mode Configurations for the 8-Gbps Modules Modules Port Speed Dynamic Bandwidth ManagementNegotiates to a maximum speed of 4 Gbps Negotiates to a maximum speed of 8 Gbps Out-of-Service Interfaces Oversubscription Ratio Restrictions Switch# show port-resources module 8 Module Bandwidth Allocation for Oversubscribed Interfaces Switch# show port-resources module Fc5/12 Shared Port-Group Total bandwidth is 32.4 Gbps Fc5/31 Buffers Gbps Bandwidth Fairness Upgrade or Downgrade ScenarioSwitch# show module 2 bandwidth-fairness Guidelines and Limitations Port Index Limitations Local Switching LimitationsSwitch# show port index-allocation Switch# show module Number of Port Indexes RequiredGeneration 1 Module Supervisor-1 Module Supervisor-2 Module Port Index Requirements for Generation 1 Modules Show port index-allocation startup PortChannel LimitationsPortChannels have the following restrictions Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide New Member Members PortChannel Type Addition Type Result PortChannel Configuration and Addition ResultsPortChannel If resources are not available Default Port 4-Gbps Port 10-Gbps Parameter Switching Module Speed mode Auto Auto1 Rate mode SharedAuto Shared Dedicated 14 Default Generation 4 Interface Parameters Configuring Fibre Channel InterfacesPort mode BBcredit buffers Configure the rate mode dedicated or shared to use Configure the rate mode dedicated or sharedConfigure the port mode Task Flow for Configuring 12-Port 4-Gbps Module Interfaces Task Flow for Configuring 4-Port 10-Gbps Module Interfaces Configuring Port Speed Configuring Rate Mode Switch# show interface fc 9/1 fc9/1 is up Displaying the Rate Mode Configuration for Interfaces Port-resources command to Switch# show port-resource module 4 Module Fc4/1232 8.0 shared Port-Group Total bandwidth is 12.8 Gbps Switch# show port-resources module 7 Module Fc7/13 Configuring Local Switching Disabling Restrictions on Oversubscription Ratios Buffers Gbps Fc2/1 Shared Fc2/2 Fc2/3 Switch# show running-config include oversubscription-limit Switch# copy running-config startup-configEnabling Restrictions on Oversubscription Ratios Shut down Enabling Bandwidth Fairness Taking Interfaces Out of Service Configuration submodeDisabling Bandwidth Fairness Selects the interface and enters interface Disables the interface Takes the interface out of serviceFc9/2 out-of-service Releasing Shared Resources in a Port Group Verifying Fibre Channel Interfaces Configuration Disabling ACL Adjacency Sharing for System Image Downgrade Displaying Interface Capabilities Switch# show interface fc 9/1 capabilitiesSwitch# show interface fc 4/1 capabilities Configuration Examples for Fibre Channel Interfaces Displaying SFP Diagnostic Information Configuration Example for 48-Port 8-Gbps Module Interfaces Configuration Example for 24-Port 8-Gbps Module InterfacesEnable the interfaces and return to configuration mode Select the interfaces fc 4/3 through fc 4/4 Disable the interfaces and take them out of service Return to configuration modeSelect interfaces fc 3/1 Select the interfaces fc 3/2 through fc 3/3 Configuration Example for 48-Port 4-Gbps Module Interfaces Switchconfig# interface fc 4/2Select the interfaces fc 4/2 through fc 4/10 Select the interfaces fc 4/1 through fc 4/6 Select the interfaces fc 3/4 through fc 3/6 Configuration Example for 24-Port 4-Gbps Module InterfacesSelect the interfaces fc 4/7 through fc 4/10 OL-29284-01, Release Information About Interface Buffers Buffer-to-Buffer Credits Performance Buffers Buffer Pools Total BB credit buffers 189047 BBCredit Buffers for Switching Modules Shared Rate Mode BBCredit Buffers Per PortGbps Speed BBCredit Buffer Allocation Fx Port Default BBcredit buffers 250 Maximum BBcredit buffers 500 Port 8-Gbps Switching Module BBCredit Buffer Allocation Default BBcredit buffers 500 Maximum BBcredit buffers 24-Port 8-Gbps Switching Module BBCredit Buffer AllocationTotal Number of BBCredit Buffers per Module Ports 1 through Ports 13 through 6000 Three ports with dedicated rate mode and 4-Gbps speed 4/44-Port 8-Gbps Switching Module BBCredit Buffer Allocation Gbps Speed Dedicated Rate Mode48-Port 4-Gbps Switching Module BBCredit Buffer Allocation Gbps 24-Port 4-Gbps Switching Module BBCredit Buffer Allocation Port 4-Gbps Fibre Channel Module BBCredit Buffers Gbps Speed BBCredit Buffer Allocation Type ISL Fx Port Port 4-Gbps Switching Module BBCredit Buffers12-Port 4-Gbps Switching Module BBCredit Buffer Allocation ISL Port 10-Gbps Switching Module BBCredit Buffers 4-Port 10-Gbps Switching Module BBCredit Buffer AllocationGbps Speed BBCredit Buffer Allocation Type Port BBCredit Buffers for Fabric Switches Cisco MDS 9148 Fabric Switch BBCredit BuffersCisco MDS 9134 Fabric Switch BBCredit Buffers Port 8-Gbps Fabric Switch BBCredit Buffer Allocation Cisco MDS 9124 Fabric Switch BBCredit Buffers User-configurable BBcredit buffers 4509 250MDS 9124 Fabric Switch BBCredit Buffer Allocation Defaults Extended BBCredits Extended BBcredits on Generation 1 Switching Modules Port Group Support for the Extended BBCredits Feature OL-29284-01, Release Buffer-to-Buffer Credit Recovery Buffer-to-Buffer State Change Number Receive Data Field Size Configuring Interface BuffersConfiguring Buffer-to-Buffer Credits Configuring Performance Buffers Configuring Extended BBcredits Enabling the Buffer-to-Buffer State Change Number Enabling Buffer-to-Buffer Credit RecoveryConfiguring Receive Data Field Size Verifying BBCredit Configuration Interface to 2000 bytes. The default isReduces the data field size for the selected Bytes and the range is from 256 to 2112 bytes Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide Information About Trunking Trunking E Ports 1a and 1b Port trunk with N port Port trunk with NP port Trunking F PortsLink Number Link Description Trunking NP port with third-party core switch F port Key ConceptsTrunking Protocols PortChannnel with NP port Trunk Link Default Your Trunk Mode ConfigurationPort Type Switch Trunking State Port Mode Port Type Core Switch NPV Switch Trunking State Link Mode Trunk-Allowed Vsan Lists and VFIDs Vsan and VF-ID Reservations Are Operational and Allowed Vsan Configuration General Guidelines and Limitations Upgrade and Downgrade Limitations Switchconfig-if#switchport trunk allowed vsanSwitch# show interface fc2/15 Difference Between TE Ports and TF-TNP Ports Sw7# show interface fc1/13 W7# show interface fc1/13 Trunking Misconfiguration Examples Vsan Mismatch Configuring Trunking Enabling the Cisco Trunking and Channeling Protocols Enabling the F Port Trunking and Channeling Protocol Configuring Trunk ModeConfiguring an Allowed-Active List of VSANs Verifying Trunking Configuration Configuration Example for F Port Trunking Enable Npiv on the MDS core switchConfigure the trunk mode to on on the MDS core switch Configure the port mode to NP on the NPV switch Save the configuration Switchconfig# copy running-config startup-config OL-29284-01, Release Configuring PortChannels Information About PortChannels PortChannel Flexibility PortChannels OverviewPortChannels Trunking Only TF PortChannelsPortChanneling and Trunking Load Balancing PortChanneling and Trunking SID1 and DID1-Based Load Balancing PortChannel Modes SID1, DID1, and Exchange-Based Load Balancing On Mode Active Mode Channel Group Configuration DifferencesPortChannel Deletion Interfaces in a PortChannel Interface Addition to a PortChannel Compatibility Check Interface Deletion from a PortChannel PortChannel ProtocolsForcing an Interface Addition Channel Group Creation Autocreating Channel Groups User-Configured Channel Group Autocreated Channel Group Autocreation Manually Configured Channel Groups Prerequisites for PortChannels Configuring PortChannels Guidelines and Limitations Generation 1 PortChannel Limitations TF PortChannel Limitations 7provides examples of valid PortChannel configurations Valid and Invalid PortChannel Examples Default PortChannel Parameters 3lists the default settings for PortChannelsMisconfigured Configurations Configuring PortChannels Configuring the PortChannel ModeConfigures the specified PortChannel 1 using Default on mode Deleting PortChannels Adding an Interface to a PortChannel Forcing an Interface Addition Deleting an Interface from a PortChannel Converting to Manually Configured Channel Groups Verifying PortChannel ConfigurationEnabling and Configuring Autocreation Switch# show port-channel summary Switch# show port-channel database port-channelExample 6-1 Displays the PortChannel Summary Port-channel database Switch# show port-channel consistency Switch# show port-channel consistency detailExample 6-4 Displays the Consistency Status without Details Example 6-5 Displays the Consistency Status with Details Example 6-6 Displays the PortChannel Usage Example 6-7 Displays the PortChannel CompatibilityExample 6-8 Displays Autocreated PortChannels Example 6-9 Displays the Specified PortChannel Interface Configuration Examples for F and TF PortChannels Create the PortChannel on the MDS core switchCreate the PortChannel on the NPV switch Example 6-10 Displays the PortChannel Summary Create the PortChannel in dedicated mode on the NPV switch Switchconfig# interface port-channel Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide Configuring N Port Virtualization NPV Overview Npiv Example Port Identifier VirtualizationPort Virtualization Cisco NPV Fabric Configuration NPV Mode Internal Flogi Parameters NP PortsNP Links Internal Flogi Parameters Default Port NumbersParameter Derived From NPV CFS Distribution over IP NPV Traffic ManagementAuto Traffic Map NPV Guidelines and Requirements Multiple Vsan SupportDisruptive Dpvm Configuration Guidelines NPV Traffic Management Guidelines Configuring N Port Virtualization Configuring NPVNPV and Port Security Configuration Guidelines Enabling N Port Identifier Virtualization To configure NPV using the CLI, perform the following tasks On the NPV core switch, enters configurationEnables Npiv mode on the NPV core switch Disables Npiv mode on the NPV core switch Configuring NPV Traffic Management Verifying NPV Configuration Enabling the Global Policy for Disruptive Load Balancing Verifying NPV Switch# show fcns databaseSwitch# show fcns database detail Verifying NPV Traffic Management Switch# show npv flogi-tableSwitch# show npv internal info traffic-map OL-29284-01, Release Information About FlexAttach Virtual pWWN FlexAttach Virtual pWWN Difference Between SDV and FlexAttach Virtualization FlexAttach Virtual pWWN CFS DistributionSAN Device Virtualization SDV FlexAttach Virtualization Automatically Assigning FlexAttach Virtual pWWN Configuring FlexAttach Virtual pWWNSecurity Settings for FlexAttach Virtual pWWN Manually Assigning FlexAttach Virtual pWWN Mapping pWWN to Virtual pWWN Verifying FlexAttach Virtual pWWN Configuration Commits the configurationSpecified virtual pWWN and the real pWWN must not be logged To map pWWN to virtual pWWN, perform this task Verifying the End Device Error Description WorkaroundMonitoring FlexAttach Virtual pWWN Error Description Workaround OL-29284-01, Release Configuring Port Tracking Information About Port Tracking 1lists the default settings for port tracking parameters Default Port Tracking Parameters Enabling Port Tracking Configuring Port TrackingInformation About Configuring Linked Ports Binding a Tracked Port Operationally Information About Tracking Multiple Ports Monitoring Ports in a Vsan Tracking Multiple PortsInformation About Monitoring Ports in a Vsan Displaying Port Tracking Information Information AboutForceful ShutdownForcefully Shutting Down a Tracked Port Linked port Port linked to interface fc1/1 Switch# show interface fc1/1Switch# show interface port-channel Example 9-4 Displays a Forced Shutdown Configuration Switch# show interface fc 1/5 Asterisk First operational port Bandwidth fairness Default settings Example configurationsPort 10-Gbps switching modules IN-2 Deleting from PortChannels IN-3 Configuring descriptions MPS-14/2 modules Configuring extended BBcredits IN-5 IN-6 Status Trunk ports Displaying information TL ports Alpa caches ConfiguringTrunk mode Administrative default Configuring IN-8