Misconfigured Configurations | Cisco Systems DSC9148D8G48PK9

Chapter 6 Configuring PortChannels

Default Settings

Figure 6-8provides examples of invalid configurations. Assuming that the links are brought up in the 1, 2, 3, 4 sequence, links 3 and 4 will be operationally down as the fabric is misconfigured.

Figure 6-8			Misconfigured Configurations
	Channel Group 10			Channel Group 20			Channel Group 10				Channel Group 20
		1
		1			1				1			1
		2			2				2			2
	Cisco MDS				Cisco MDS			Cisco MDS				Cisco MDS
	Switch A	3	X		3 Switch B			Switch A	3	X		3Switch B
		4	X		4				4	X		4
		4	X		4				4	X		4
			X							X

Channel Group 10			Channel Group 20

	1			1
				Cisco MDS
				Cisco MDS
	2			2 Switch B
Cisco MDS
Switch A
Switch A	3	X		3
	3			3
				Cisco MDS
	4	X		4 Switch C
		X

120488

Default Settings

Table 6-3lists the default settings for PortChannels.

Table 6-3	Default PortChannel Parameters

Parameters		Default

PortChannels		FSPF is enabled by default.

Create PortChannel		Administratively up.

Default PortChannel mode		ON mode on non-NPV and NPIV core switches.
		ACTIVE mode on NPV switches.

Autocreation		Disabled.

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
6-16	OL-29284-01, Release 6.x

Image 186

Cisco Systems DSC9148D8G48PK9 manual 3lists the default settings for PortChannels, Misconfigured Configurations

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 Three new counters for the port Monitor command Port Monitor Configuring Port Added information about 22aEnhancements Monitor Policy Feature Port Monitor Port Guard About This Guide FlexAttach Monitoring Monitoring a selected port groupEnhancements Audience OrganizationChapter Title Description Document Conventions Boldface font Related Documentation Command-Line Interface Troubleshooting and Reference Trunks and PortChannels Fibre Channel Port Rate Limiting Extended Credits Port VirtualizationFlexAttach Interfaces Overview FlexAttach OL-29284-01, Release Configuring Interfaces Information About Interfaces Interface Description Interface Modes Port FL PortNP Ports TL Port TE PortTF Port SD Port Auto ModeTNP Port ST Port Operational States Administrative StatesInterface States Reason Codes Administrative Operational Configuration Status Reason Code NoneReason Codes for Interface States Applicable Reason Code long version Description ModesReason Codes for Nonoperational States Graceful Shutdown Port Administrative Speeds Frame EncapsulationAutosensing Beacon LEDs Bit Error ThresholdsCisco MDS 9000 Family Switch Interface Modes Speed LEDs SFP Transmitter Types Extended transmitters assigned to Cisco-supported SFPsSFP Transmitter Acronym Definitions Translation from Translation to Example TL PortsCWDM-1590 CWDM-1610 C1590 C1610 Supported TL Port Translations TL Port Alpa Caches Port Guard Port Monitor Threshold Interval Rising Falling Counter Type Seconds Event Port Group Monitor Local SwitchingPort Monitor Port Guard Rising Threshold Slow Drain Device Detection and Congestion Avoidance Management Interfaces Guidelines and Limitations Generation 1 Interface Configuration GuidelinesPrerequisites for Interfaces Vsan Interfaces Private Loop Configuration Guidelines Vsan Interface Configuration Guidelines 7lists the default settings for interface parameters Default SettingsConfiguring Interfaces Parameters Default Configuring Fibre Channel Interfaces Command Purpose Setting the Interface Administrative State Configuring Interface Modes Mode F if applicable Configuring System Default Port Mode FSets the administrative mode of Fibre Channel ports to 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 Interface configuration submode Configuring Beacon ModeEnters configuration mode Specifying a Port Owner Disabling Bit Error Threshold Configuring Switch Port Attribute Default Values Manually Inserting Entries into the Alpa Cache Configuring TL PortsConfigures manual entries into the Alpa cache Clearing the Alpa Cache Configuring Port Guard Enables default port monitoring Configuring Port MonitorTo enable port monitor, follow these steps Disables port monitoring Configuring a Port Monitor Policy Reverts to the default policy for sync loss Specifies the delta protocol error poll intervalSpecifies the delta signal loss poll interval Reverts to the default policy for Tx performance Configuring a Port Monitor Port Guard Configuring Port Group MonitorActivating a Port Monitor Policy 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 Congestion Frame Timeout Value Configuring Stuck Frame Timeout ValueConfiguring No-Credit Timeout Value Mode for the switch Configuring Credit Loss Recovery Threshold and ActionSpecifies the no-credit timeout value and port Specifies the default no-credit timeout value port Verifying Interfaces Configuration Configuring Interfaces Verifying Interfaces Configuration Discards, 0 errors Displaying Interface InformationExample 2-3 Displays All Interfaces Example 2-4 Displays Multiple, Specified Interfaces Interface fc1/1 5 , fc2/5Interface fc3/13 , fc3/16 Switch# show interface fc2/2 fc2/2 is trunking Example 2-5 Displays a Specific InterfaceFrames/sec Switch# show interface description Switch# show interface briefExample 2-6 Displays Port Description 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 Switch# show tlport list Displaying TL Port InformationExample 2-17 Displays the TL Ports in All VSANs 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 Pgm1 Switch# show port-group-monitorDefault Pgm2 Displaying Management Interface Configuration Switch# show interface mgmt 0 mgmt0 is upDisplaying Vsan Interface Information OL-29284-01, Release Generations of Modules and Switches Information About Fibre Channel Interfaces Backplane crossbar bandwidth Generation 3 Fabric SwitchPart Number Product Name and Description Any-to-any connectivity Maximum Generation 2 Fabric SwitchesPort Groups Product Name Part Number Description Per Port Group Gbps Generation 3 Fabric SwitchesDS-C9148-K9 Port 8-Gbps Cisco MDS Fabric switch Generation 3 Modules Port Rate Modes Supports Default Speed Product Name Mode and RateSwitches Configured Speed Reserved Bandwidth Dedicated Rate ModePart Number Description Mode Mode on All Ports 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 Negotiates to a maximum speed of 4 Gbps Port SpeedDynamic Bandwidth Management 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 Upgrade or Downgrade Scenario Switch# show module 2 bandwidth-fairnessBandwidth Fairness Guidelines and Limitations Local Switching Limitations Switch# show port index-allocationPort Index Limitations Generation 1 Module Supervisor-1 Module Supervisor-2 Module Switch# show moduleNumber of Port Indexes Required Port Index Requirements for Generation 1 Modules PortChannel Limitations PortChannels have the following restrictionsShow port index-allocation startup Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide PortChannel Configuration and Addition Results PortChannelNew Member Members PortChannel Type Addition Type Result If resources are not available Auto Default Port 4-Gbps Port 10-Gbps Parameter Switching ModuleSpeed mode Auto Auto1 Rate mode Shared Shared Dedicated Configuring Fibre Channel Interfaces Port mode BBcredit buffers14 Default Generation 4 Interface Parameters Configure the rate mode dedicated or shared Configure the port modeConfigure the rate mode dedicated or shared to use 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 Enabling Restrictions on Oversubscription Ratios Switch# show running-config include oversubscription-limitSwitch# copy running-config startup-config Shut down Enabling Bandwidth Fairness Disabling Bandwidth Fairness Taking Interfaces Out of ServiceConfiguration submode Selects the interface and enters interface Fc9/2 out-of-service Disables the interfaceTakes the interface out of service Releasing Shared Resources in a Port Group Verifying Fibre Channel Interfaces Configuration Disabling ACL Adjacency Sharing for System Image Downgrade Switch# show interface fc 9/1 capabilities Switch# show interface fc 4/1 capabilitiesDisplaying Interface Capabilities Configuration Examples for Fibre Channel Interfaces Displaying SFP Diagnostic Information Enable the interfaces and return to configuration mode Configuration Example for 48-Port 8-Gbps Module InterfacesConfiguration Example for 24-Port 8-Gbps Module Interfaces Select the interfaces fc 4/3 through fc 4/4 Select interfaces fc 3/1 Disable the interfaces and take them out of serviceReturn to configuration mode Select the interfaces fc 3/2 through fc 3/3 Select the interfaces fc 4/2 through fc 4/10 Configuration Example for 48-Port 4-Gbps Module InterfacesSwitchconfig# interface fc 4/2 Select the interfaces fc 4/1 through fc 4/6 Configuration Example for 24-Port 4-Gbps Module Interfaces Select the interfaces fc 4/7 through fc 4/10Select the interfaces fc 3/4 through fc 3/6 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 Gbps Speed BBCredit Buffer Allocation Shared Rate ModeBBCredit Buffers Per Port Fx Port Default BBcredit buffers 250 Maximum BBcredit buffers 500 Port 8-Gbps Switching Module BBCredit Buffer Allocation Total Number of BBCredit Buffers per Module Default BBcredit buffers 500 Maximum BBcredit buffers24-Port 8-Gbps Switching Module BBCredit Buffer Allocation 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 Dedicated Rate Mode 48-Port 4-Gbps Switching Module BBCredit Buffer AllocationGbps Speed Gbps 24-Port 4-Gbps Switching Module BBCredit Buffer Allocation Port 4-Gbps Fibre Channel Module BBCredit Buffers Port 4-Gbps Switching Module BBCredit Buffers 12-Port 4-Gbps Switching Module BBCredit Buffer AllocationGbps Speed BBCredit Buffer Allocation Type ISL Fx Port ISL Gbps Speed BBCredit Buffer Allocation Type Port 10-Gbps Switching Module BBCredit Buffers4-Port 10-Gbps Switching Module BBCredit Buffer Allocation Port Cisco MDS 9134 Fabric Switch BBCredit Buffers BBCredit Buffers for Fabric SwitchesCisco MDS 9148 Fabric Switch BBCredit Buffers Port 8-Gbps Fabric Switch BBCredit Buffer Allocation MDS 9124 Fabric Switch BBCredit Buffer Allocation Defaults Cisco MDS 9124 Fabric Switch BBCredit BuffersUser-configurable BBcredit buffers 4509 250 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 Configuring Interface Buffers Configuring Buffer-to-Buffer CreditsReceive Data Field Size Configuring Performance Buffers Configuring Extended BBcredits Enabling Buffer-to-Buffer Credit Recovery Configuring Receive Data Field SizeEnabling the Buffer-to-Buffer State Change Number Reduces the data field size for the selected Verifying BBCredit ConfigurationInterface to 2000 bytes. The default is 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 Trunking F Ports Link Number Link Description1a and 1b Port trunk with N port Port trunk with NP port Trunking Protocols Trunking NP port with third-party core switch F portKey Concepts PortChannnel with NP port Port Type Switch Trunking State Port Mode Trunk Link DefaultYour Trunk Mode Configuration 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 Switch# show interface fc2/15 Upgrade and Downgrade LimitationsSwitchconfig-if#switchport trunk allowed vsan 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 Configuring Trunk Mode Configuring an Allowed-Active List of VSANsEnabling the F Port Trunking and Channeling Protocol Verifying Trunking Configuration Configure the trunk mode to on on the MDS core switch Configuration Example for F Port TrunkingEnable Npiv 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 PortChannels Overview PortChannelsPortChannel Flexibility TF PortChannels PortChanneling and TrunkingTrunking Only Load Balancing PortChanneling and Trunking SID1 and DID1-Based Load Balancing PortChannel Modes SID1, DID1, and Exchange-Based Load Balancing PortChannel Deletion On Mode Active ModeChannel Group Configuration Differences Interfaces in a PortChannel Interface Addition to a PortChannel Compatibility Check PortChannel Protocols Forcing an Interface AdditionInterface Deletion from a PortChannel 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 3lists the default settings for PortChannels Misconfigured ConfigurationsDefault PortChannel Parameters Configures the specified PortChannel 1 using Configuring PortChannelsConfiguring the PortChannel Mode Default on mode Deleting PortChannels Adding an Interface to a PortChannel Forcing an Interface Addition Deleting an Interface from a PortChannel Verifying PortChannel Configuration Enabling and Configuring AutocreationConverting to Manually Configured Channel Groups Example 6-1 Displays the PortChannel Summary Switch# show port-channel summarySwitch# show port-channel database port-channel Port-channel database Example 6-4 Displays the Consistency Status without Details Switch# show port-channel consistencySwitch# show port-channel consistency detail Example 6-5 Displays the Consistency Status with Details Example 6-8 Displays Autocreated PortChannels Example 6-6 Displays the PortChannel UsageExample 6-7 Displays the PortChannel Compatibility Example 6-9 Displays the Specified PortChannel Interface Create the PortChannel on the NPV switch Configuration Examples for F and TF PortChannelsCreate the PortChannel on the MDS core 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 Port Identifier Virtualization Port VirtualizationNpiv Example Cisco NPV Fabric Configuration NPV Mode NP Ports NP LinksInternal Flogi Parameters Default Port Numbers Parameter Derived FromInternal Flogi Parameters Auto NPV CFS Distribution over IPNPV Traffic Management Traffic Map Multiple Vsan Support DisruptiveNPV Guidelines and Requirements Dpvm Configuration Guidelines NPV Traffic Management Guidelines NPV and Port Security Configuration Guidelines Configuring N Port VirtualizationConfiguring NPV Enabling N Port Identifier Virtualization Enables Npiv mode on the NPV core switch To configure NPV using the CLI, perform the following tasksOn the NPV core switch, enters configuration Disables Npiv mode on the NPV core switch Configuring NPV Traffic Management Verifying NPV Configuration Enabling the Global Policy for Disruptive Load Balancing Switch# show fcns database Switch# show fcns database detailVerifying NPV Switch# show npv flogi-table Switch# show npv internal info traffic-mapVerifying NPV Traffic Management OL-29284-01, Release Information About FlexAttach Virtual pWWN FlexAttach Virtual pWWN FlexAttach Virtual pWWN CFS Distribution SAN Device Virtualization SDV FlexAttach VirtualizationDifference Between SDV and FlexAttach Virtualization Configuring FlexAttach Virtual pWWN Security Settings for FlexAttach Virtual pWWNAutomatically Assigning FlexAttach Virtual pWWN Manually Assigning FlexAttach Virtual pWWN Mapping pWWN to Virtual pWWN Specified virtual pWWN and the real pWWN must not be logged Verifying FlexAttach Virtual pWWN ConfigurationCommits the configuration To map pWWN to virtual pWWN, perform this task Error Description Workaround Monitoring FlexAttach Virtual pWWNVerifying the End Device 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 Configuring Port Tracking Information About Configuring Linked PortsEnabling Port Tracking Binding a Tracked Port Operationally Information About Tracking Multiple Ports Tracking Multiple Ports Information About Monitoring Ports in a VsanMonitoring Ports in a Vsan Forcefully Shutting Down a Tracked Port Displaying Port Tracking InformationInformation AboutForceful Shutdown Linked port Switch# show interface fc1/1 Switch# show interface port-channelPort linked to interface fc1/1 Example 9-4 Displays a Forced Shutdown Configuration Switch# show interface fc 1/5 Bandwidth fairness Default settings Example configurations Port 10-Gbps switching modulesAsterisk First operational port IN-2 Deleting from PortChannels IN-3 Configuring descriptions MPS-14/2 modules Configuring extended BBcredits IN-5 IN-6 TL ports Alpa caches Configuring Trunk mode Administrative default ConfiguringStatus Trunk ports Displaying information IN-8