SID1 and DID1-Based Load Balancing

Chapter 6 Configuring PortChannels

Information About PortChannels

Figure 6-4

SID1, DID1, Exchange 1

Frame 1

Frame 2

Frame 3

Link 1

Link 2

SID1, DID1, Exchange 2

SID2, DID2 Exchange 1

	Frame n					Link 1
	Frame n


	Frame 1
	Frame 1

	Frame 2					Link 2
	Frame 2

	Frame 3


Frame n
Frame n


Frame 1		Link 1
Frame 1		Link 1

Frame	2	Link 2
Frame	2

Frame	3

Frame n

79530

Figure 6-5illustrates how exchange-based load balancing works. When the first frame in an exchange is received for forwarding on an interface, link 1 is chosen by a hash algorithm. All remaining frames in that particular exchange are sent on the same link. For exchange 1, no frame uses link 2. For the next exchange, link 2 is chosen by the hash algorithm. Now all frames in exchange 2 use link 2.

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

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Image 175

Cisco Systems DSC9148D8G48PK9 manual SID1 and DID1-Based Load Balancing

Contents

Americas Headquarters Cisco MDS 9000 Family NX-OS Interfaces Configuration GuidePage 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 About This Guide Port Monitor Configuring Port Added information about 22aEnhancements Monitor Policy Feature Port Monitor Port Guard Three new counters for the port Monitor command Monitoring Monitoring a selected port group FlexAttachEnhancements Organization AudienceChapter Title Description Boldface font Document Conventions Related Documentation Troubleshooting and Reference Command-Line Interface Fibre Channel Port Rate Limiting Trunks and PortChannels Port Virtualization Extended CreditsFlexAttach Interfaces Overview FlexAttach OL-29284-01, Release Information About Interfaces Configuring Interfaces Interface Modes Interface Description FL Port PortNP Ports TE Port TL PortTF Port ST Port Auto ModeTNP Port SD Port Reason Codes Administrative StatesInterface States Operational States None Administrative Operational Configuration Status Reason CodeReason Codes for Interface States Reason Code long version Description Modes ApplicableReason Codes for Nonoperational States Graceful Shutdown Frame Encapsulation Port Administrative SpeedsAutosensing Speed LEDs Bit Error ThresholdsCisco MDS 9000 Family Switch Interface Modes Beacon LEDs Extended transmitters assigned to Cisco-supported SFPs SFP Transmitter TypesSFP Transmitter Acronym Definitions Supported TL Port Translations TL PortsCWDM-1590 CWDM-1610 C1590 C1610 Translation from Translation to Example Port Guard TL Port Alpa Caches Threshold Interval Rising Falling Counter Type Seconds Event Port Monitor Rising Threshold Local SwitchingPort Monitor Port Guard Port Group Monitor Management Interfaces Slow Drain Device Detection and Congestion Avoidance Vsan Interfaces Generation 1 Interface Configuration GuidelinesPrerequisites for Interfaces Guidelines and Limitations Vsan Interface Configuration Guidelines Private Loop Configuration Guidelines Parameters Default Default SettingsConfiguring Interfaces 7lists the default settings for interface parameters Command Purpose Configuring Fibre Channel Interfaces Configuring Interface Modes Setting the Interface Administrative State Default unless user configured Configuring System Default Port Mode FSets the administrative mode of Fibre Channel ports to Mode F if applicable Configuring 10-Gbps FC Mode Configuring ISL between Two Switches Configuring Port Administrative Speeds Configuring the Interface Description Configuring Port Speed Group Specifying a Port Owner Configuring Beacon ModeEnters configuration mode Interface configuration submode Configuring Switch Port Attribute Default Values Disabling Bit Error Threshold Clearing the Alpa Cache Configuring TL PortsConfigures manual entries into the Alpa cache Manually Inserting Entries into the Alpa Cache Configuring Port Guard Disables port monitoring Configuring Port MonitorTo enable port monitor, follow these steps Enables default port monitoring Configuring a Port Monitor Policy Reverts to the default policy for Tx performance Specifies the delta protocol error poll intervalSpecifies the delta signal loss poll interval Reverts to the default policy for sync loss Configuring Port Group Monitor Configuring a Port Monitor Port GuardActivating a Port Monitor Policy Enabling Port Group Monitor Configuring a Port Group Monitor Policy Turning Off the Monitoring of Specific Counter Reverting to the Default Policy for a Specific Counter Activating a Port Group Monitor Policy Configuring Management Interfaces Creating Vsan Interfaces Configuring Stuck Frame Timeout Value Configuring Congestion Frame Timeout ValueConfiguring No-Credit Timeout Value Specifies the default no-credit timeout value port Configuring Credit Loss Recovery Threshold and ActionSpecifies the no-credit timeout value and port Mode for the switch Configuring Interfaces Verifying Interfaces Configuration Verifying Interfaces Configuration Displaying Interface Information Discards, 0 errorsExample 2-3 Displays All Interfaces Interface fc1/1 5 , fc2/5 Example 2-4 Displays Multiple, Specified InterfacesInterface fc3/13 , fc3/16 Example 2-5 Displays a Specific Interface Switch# show interface fc2/2 fc2/2 is trunkingFrames/sec Switch# show interface brief Switch# show interface descriptionExample 2-6 Displays Port Description Example 2-8 Displays Interface Counters Switch# show interface counters fc3/1 Example 2-9 Displays Interface Counters in Brief Format Switch# show interface counters brief Example 2-10 Displays Transceiver Information Switch# show running-config System default switchport mode F interface fc4/1 Switch# show running-config interface fc1/1 Displaying TL Port Information Switch# show tlport listExample 2-17 Displays the TL Ports in All VSANs Displaying Port Monitor Status and Policies Displaying the Alpa Cache Contents Port-monitor active Switch# show port-monitor Displaying Port Group Monitor Status and Policies Switch# show port-group-monitor status Pgm2 Switch# show port-group-monitorDefault Pgm1 Switch# show interface mgmt 0 mgmt0 is up Displaying Management Interface ConfigurationDisplaying Vsan Interface Information OL-29284-01, Release Information About Fibre Channel Interfaces Generations of Modules and Switches Any-to-any connectivity Generation 3 Fabric SwitchPart Number Product Name and Description Backplane crossbar bandwidth Product Name Generation 2 Fabric SwitchesPort Groups Maximum Generation 3 Modules Generation 3 Fabric SwitchesDS-C9148-K9 Port 8-Gbps Cisco MDS Fabric switch Part Number Description Per Port Group Gbps Port Rate Modes Mode and Rate Supports Default Speed Product NameSwitches Auto Gbps Auto with 4-Gbps maximum Dedicated Rate ModePart Number Description Mode Mode on All Ports Configured Speed Reserved Bandwidth Auto Gbps Auto with 2-Gbps maximum Shared Rate Mode Modules Dedicated Rate Mode Configurations for the 8-Gbps Modules Negotiates to a maximum speed of 8 Gbps Port SpeedDynamic Bandwidth Management Negotiates to a maximum speed of 4 Gbps Oversubscription Ratio Restrictions Out-of-Service Interfaces Bandwidth Allocation for Oversubscribed Interfaces Switch# show port-resources module 8 Module Switch# show port-resources module Fc5/12 Shared Port-Group Total bandwidth is 32.4 Gbps Fc5/31 Buffers Gbps Switch# show module 2 bandwidth-fairness Upgrade or Downgrade ScenarioBandwidth Fairness Guidelines and Limitations Switch# show port index-allocation Local Switching LimitationsPort Index Limitations Port Index Requirements for Generation 1 Modules Switch# show moduleNumber of Port Indexes Required Generation 1 Module Supervisor-1 Module Supervisor-2 Module PortChannels have the following restrictions PortChannel LimitationsShow port index-allocation startup Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide PortChannel PortChannel Configuration and Addition ResultsNew Member Members PortChannel Type Addition Type Result If resources are not available Shared Dedicated Default Port 4-Gbps Port 10-Gbps Parameter Switching ModuleSpeed mode Auto Auto1 Rate mode Shared Auto Port mode BBcredit buffers Configuring Fibre Channel Interfaces14 Default Generation 4 Interface Parameters Configure the port mode Configure the rate mode dedicated or sharedConfigure the rate mode dedicated or shared to use Task Flow for Configuring 4-Port 10-Gbps Module Interfaces Task Flow for Configuring 12-Port 4-Gbps Module Interfaces Configuring Port Speed Switch# show interface fc 9/1 fc9/1 is up Configuring Rate Mode Port-resources command to Displaying the Rate Mode Configuration for Interfaces 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 Shut down Switch# show running-config include oversubscription-limitSwitch# copy running-config startup-config Enabling Restrictions on Oversubscription Ratios Enabling Bandwidth Fairness Selects the interface and enters interface Taking Interfaces Out of ServiceConfiguration submode Disabling Bandwidth Fairness Releasing Shared Resources in a Port Group Disables the interfaceTakes the interface out of service Fc9/2 out-of-service Disabling ACL Adjacency Sharing for System Image Downgrade Verifying Fibre Channel Interfaces Configuration Switch# show interface fc 4/1 capabilities Switch# show interface fc 9/1 capabilitiesDisplaying Interface Capabilities Displaying SFP Diagnostic Information Configuration Examples for Fibre Channel Interfaces Select the interfaces fc 4/3 through fc 4/4 Configuration Example for 48-Port 8-Gbps Module InterfacesConfiguration Example for 24-Port 8-Gbps Module Interfaces Enable the interfaces and return to configuration mode Select the interfaces fc 3/2 through fc 3/3 Disable the interfaces and take them out of serviceReturn to configuration mode Select interfaces fc 3/1 Select the interfaces fc 4/1 through fc 4/6 Configuration Example for 48-Port 4-Gbps Module InterfacesSwitchconfig# interface fc 4/2 Select the interfaces fc 4/2 through fc 4/10 Select the interfaces fc 4/7 through fc 4/10 Configuration Example for 24-Port 4-Gbps Module InterfacesSelect the interfaces fc 3/4 through fc 3/6 OL-29284-01, Release Buffer-to-Buffer Credits Information About Interface Buffers Buffer Pools Performance Buffers Total BB credit buffers 189047 BBCredit Buffers for Switching Modules Fx Port Shared Rate ModeBBCredit Buffers Per Port Gbps Speed BBCredit Buffer Allocation Port 8-Gbps Switching Module BBCredit Buffer Allocation Default BBcredit buffers 250 Maximum BBcredit buffers 500 Ports 1 through Ports 13 through 6000 Default BBcredit buffers 500 Maximum BBcredit buffers24-Port 8-Gbps Switching Module BBCredit Buffer Allocation Total Number of BBCredit Buffers per Module 4/44-Port 8-Gbps Switching Module BBCredit Buffer Allocation Three ports with dedicated rate mode and 4-Gbps speed 48-Port 4-Gbps Switching Module BBCredit Buffer Allocation Dedicated Rate ModeGbps Speed Gbps Port 4-Gbps Fibre Channel Module BBCredit Buffers 24-Port 4-Gbps Switching Module BBCredit Buffer Allocation 12-Port 4-Gbps Switching Module BBCredit Buffer Allocation Port 4-Gbps Switching Module BBCredit BuffersGbps Speed BBCredit Buffer Allocation Type ISL Fx Port ISL Port Port 10-Gbps Switching Module BBCredit Buffers4-Port 10-Gbps Switching Module BBCredit Buffer Allocation Gbps Speed BBCredit Buffer Allocation Type Port 8-Gbps Fabric Switch BBCredit Buffer Allocation BBCredit Buffers for Fabric SwitchesCisco MDS 9148 Fabric Switch BBCredit Buffers Cisco MDS 9134 Fabric Switch BBCredit Buffers Extended BBCredits Cisco MDS 9124 Fabric Switch BBCredit BuffersUser-configurable BBcredit buffers 4509 250 MDS 9124 Fabric Switch BBCredit Buffer Allocation Defaults Port Group Support for the Extended BBCredits Feature Extended BBcredits on Generation 1 Switching Modules OL-29284-01, Release Buffer-to-Buffer State Change Number Buffer-to-Buffer Credit Recovery Configuring Buffer-to-Buffer Credits Configuring Interface BuffersReceive Data Field Size Configuring Performance Buffers Configuring Extended BBcredits Configuring Receive Data Field Size Enabling Buffer-to-Buffer Credit RecoveryEnabling the Buffer-to-Buffer State Change Number Bytes and the range is from 256 to 2112 bytes Verifying BBCredit ConfigurationInterface to 2000 bytes. The default is Reduces the data field size for the selected Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide Trunking E Ports Information About Trunking Link Number Link Description Trunking F Ports1a and 1b Port trunk with N port Port trunk with NP port PortChannnel with NP port Trunking NP port with third-party core switch F portKey Concepts Trunking Protocols Port Type Core Switch NPV Switch Trunking State Link Mode Trunk Link DefaultYour Trunk Mode Configuration Port Type Switch Trunking State Port Mode Vsan and VF-ID Reservations Trunk-Allowed Vsan Lists and VFIDs Are General Guidelines and Limitations Operational and Allowed Vsan Configuration Difference Between TE Ports and TF-TNP Ports Upgrade and Downgrade LimitationsSwitchconfig-if#switchport trunk allowed vsan Switch# show interface fc2/15 W7# show interface fc1/13 Sw7# show interface fc1/13 Vsan Mismatch Trunking Misconfiguration Examples Enabling the Cisco Trunking and Channeling Protocols Configuring Trunking Configuring an Allowed-Active List of VSANs Configuring Trunk ModeEnabling the F Port Trunking and Channeling Protocol Verifying Trunking Configuration Configure the port mode to NP on the NPV switch Configuration Example for F Port TrunkingEnable Npiv on the MDS core switch Configure the trunk mode to on on the MDS core switch Switchconfig# copy running-config startup-config Save the configuration OL-29284-01, Release Information About PortChannels Configuring PortChannels PortChannels PortChannels OverviewPortChannel Flexibility PortChanneling and Trunking TF PortChannelsTrunking Only PortChanneling and Trunking Load Balancing SID1 and DID1-Based Load Balancing SID1, DID1, and Exchange-Based Load Balancing PortChannel Modes Interfaces in a PortChannel On Mode Active ModeChannel Group Configuration Differences PortChannel Deletion Compatibility Check Interface Addition to a PortChannel Forcing an Interface Addition PortChannel ProtocolsInterface Deletion from a PortChannel Autocreating Channel Groups Channel Group Creation Autocreation User-Configured Channel Group Autocreated Channel Group Prerequisites for PortChannels Manually Configured Channel Groups Configuring PortChannels Guidelines and Limitations TF PortChannel Limitations Generation 1 PortChannel Limitations Valid and Invalid PortChannel Examples 7provides examples of valid PortChannel configurations Misconfigured Configurations 3lists the default settings for PortChannelsDefault PortChannel Parameters Default on mode Configuring PortChannelsConfiguring the PortChannel Mode Configures the specified PortChannel 1 using Adding an Interface to a PortChannel Deleting PortChannels Deleting an Interface from a PortChannel Forcing an Interface Addition Enabling and Configuring Autocreation Verifying PortChannel ConfigurationConverting to Manually Configured Channel Groups Port-channel database Switch# show port-channel summarySwitch# show port-channel database port-channel Example 6-1 Displays the PortChannel Summary Example 6-5 Displays the Consistency Status with Details Switch# show port-channel consistencySwitch# show port-channel consistency detail Example 6-4 Displays the Consistency Status without Details Example 6-9 Displays the Specified PortChannel Interface Example 6-6 Displays the PortChannel UsageExample 6-7 Displays the PortChannel Compatibility Example 6-8 Displays Autocreated PortChannels Example 6-10 Displays the PortChannel Summary Configuration Examples for F and TF PortChannelsCreate the PortChannel on the MDS core switch Create the PortChannel on the NPV switch Switchconfig# interface port-channel Create the PortChannel in dedicated mode on the NPV switch Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide NPV Overview Configuring N Port Virtualization Port Virtualization Port Identifier VirtualizationNpiv Example Cisco NPV Fabric Configuration NPV Mode NP Links NP PortsInternal Flogi Parameters Parameter Derived From Default Port NumbersInternal Flogi Parameters Traffic Map NPV CFS Distribution over IPNPV Traffic Management Auto Disruptive Multiple Vsan SupportNPV Guidelines and Requirements NPV Traffic Management Guidelines Dpvm Configuration Guidelines Enabling N Port Identifier Virtualization Configuring N Port VirtualizationConfiguring NPV NPV and Port Security Configuration Guidelines Disables Npiv mode on the NPV core switch To configure NPV using the CLI, perform the following tasksOn the NPV core switch, enters configuration Enables Npiv mode on the NPV core switch Configuring NPV Traffic Management Enabling the Global Policy for Disruptive Load Balancing Verifying NPV Configuration Switch# show fcns database detail Switch# show fcns databaseVerifying NPV Switch# show npv internal info traffic-map Switch# show npv flogi-tableVerifying NPV Traffic Management OL-29284-01, Release FlexAttach Virtual pWWN Information About FlexAttach Virtual pWWN SAN Device Virtualization SDV FlexAttach Virtualization FlexAttach Virtual pWWN CFS DistributionDifference Between SDV and FlexAttach Virtualization Security Settings for FlexAttach Virtual pWWN Configuring FlexAttach Virtual pWWNAutomatically Assigning FlexAttach Virtual pWWN Mapping pWWN to Virtual pWWN Manually Assigning FlexAttach Virtual pWWN To map pWWN to virtual pWWN, perform this task Verifying FlexAttach Virtual pWWN ConfigurationCommits the configuration Specified virtual pWWN and the real pWWN must not be logged Monitoring FlexAttach Virtual pWWN Error Description WorkaroundVerifying the End Device Error Description Workaround OL-29284-01, Release Information About Port Tracking Configuring Port Tracking Default Port Tracking Parameters 1lists the default settings for port tracking parameters Information About Configuring Linked Ports Configuring Port TrackingEnabling Port Tracking Information About Tracking Multiple Ports Binding a Tracked Port Operationally Information About Monitoring Ports in a Vsan Tracking Multiple PortsMonitoring Ports in a Vsan Linked port Displaying Port Tracking InformationInformation AboutForceful Shutdown Forcefully Shutting Down a Tracked Port Switch# show interface port-channel Switch# show interface fc1/1Port linked to interface fc1/1 Switch# show interface fc 1/5 Example 9-4 Displays a Forced Shutdown Configuration Port 10-Gbps switching modules Bandwidth fairness Default settings Example configurationsAsterisk First operational port IN-2 IN-3 Deleting from PortChannels MPS-14/2 modules Configuring extended BBcredits Configuring descriptions IN-5 IN-6 Trunk mode Administrative default Configuring TL ports Alpa caches ConfiguringStatus Trunk ports Displaying information IN-8

SID1 and DID1-Based Load Balancing

OL-29284-01, Release 6.x