OL-29284-01, Release | Cisco Systems DSC9148D8G48PK9 specification

Chapter 4 Configuring Interface Buffers

Information About Interface Buffers

Note The receive BB_credit value for the remaining three ports depends on the port mode. The default value is 16 for the Fx mode and 255 for E or TE modes. The maximum value is 255 in all modes. This value can be changed as required without exceeding the maximum value of 255 BB_credits.

–If you assign more than 2,400 (up to a maximum of 3,500) extended BB_credits to the port in a port group, you must disable the other three ports.

•If you change the BB_credit value the port is disabled, and then reenabled.

–Disable (explicitly) this feature if you need to nondisruptively downgrade to Cisco SAN-OS Release 1.3 or earlier. When you disable this feature, the existing extended BB_credit configuration is completely erased.

Note The extended BB_credit configuration takes precedence over the receive BB_credit and performance buffer configurations.

Extended BB_credits on Generation 2 and Generation 3 Switching Modules

To use this feature on Generation 2 or Generation 3 switching modules, you must meet the following requirements:

•Display the interface configuration in the Information pane.

•Obtain the Enterprise package (ENTERPRISE_PKG) license (see the NX-OS Family Licensing Guide).

•Configure this feature in any port on a Generation 2 switch module. See the “Extended BB_Credits” section on page 4-17for more information on extended BB_credits on Generation 2 switching modules.

Note Extended BB_credits are not supported on the Cisco MDS 9124 Fabric Switch, Cisco MDS 9134 Fabric Switch, the Cisco Fabric Switch for HP c-Class BladeSystem, and the Cisco Fabric Switch for IBM BladeCenter.

		Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
		Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
	OL-29284-01, Release 6.x			4-19
	OL-29284-01, Release 6.x			4-19

Image 147

Cisco Systems DSC9148D8G48PK9 manual OL-29284-01, Release

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 FlexAttach Monitoring Monitoring a selected port groupEnhancements Audience OrganizationChapter Title Description Boldface font Document Conventions Related Documentation Troubleshooting and Reference Command-Line Interface Fibre Channel Port Rate Limiting Trunks and PortChannels Extended Credits Port VirtualizationFlexAttach Interfaces Overview FlexAttach OL-29284-01, Release Information About Interfaces Configuring Interfaces Interface Modes Interface Description Port FL PortNP Ports TL Port TE PortTF Port ST Port Auto ModeTNP Port SD Port Reason Codes Administrative StatesInterface States Operational States 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 Speed LEDs Bit Error ThresholdsCisco MDS 9000 Family Switch Interface Modes Beacon LEDs SFP Transmitter Types Extended transmitters assigned to Cisco-supported SFPsSFP 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 a Port Monitor Port Guard Configuring Port Group MonitorActivating 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 Congestion Frame Timeout Value Configuring Stuck 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 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 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 Switch# show tlport list Displaying TL Port InformationExample 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 Displaying Management Interface Configuration Switch# show interface mgmt 0 mgmt0 is upDisplaying 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 Supports Default Speed Product Name Mode and RateSwitches 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 Upgrade or Downgrade Scenario Switch# show module 2 bandwidth-fairnessBandwidth Fairness Guidelines and Limitations Local Switching Limitations Switch# show port index-allocationPort 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 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 Shared Dedicated Default Port 4-Gbps Port 10-Gbps Parameter Switching ModuleSpeed mode Auto Auto1 Rate mode Shared Auto 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 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 9/1 capabilities Switch# show interface fc 4/1 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 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 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 Dedicated Rate Mode 48-Port 4-Gbps Switching Module BBCredit Buffer AllocationGbps Speed Gbps Port 4-Gbps Fibre Channel Module BBCredit Buffers 24-Port 4-Gbps Switching Module BBCredit Buffer Allocation 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 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 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 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 Trunking F Ports Link Number Link Description1a 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 Trunk Mode Configuring an Allowed-Active List of VSANsEnabling 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 Overview PortChannelsPortChannel Flexibility TF PortChannels PortChanneling and TrunkingTrunking 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 PortChannel Protocols Forcing an Interface AdditionInterface 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 3lists the default settings for PortChannels Misconfigured ConfigurationsDefault 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 Verifying PortChannel Configuration Enabling and Configuring AutocreationConverting 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 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 Traffic Map NPV CFS Distribution over IPNPV Traffic Management Auto Multiple Vsan Support DisruptiveNPV 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 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 FlexAttach Virtual pWWN Information About 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 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 Error Description Workaround Monitoring FlexAttach Virtual pWWNVerifying 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 Configuring Port Tracking Information About Configuring Linked PortsEnabling Port Tracking Information About Tracking Multiple Ports Binding a Tracked Port Operationally Tracking Multiple Ports Information About Monitoring Ports in a VsanMonitoring Ports in a Vsan Linked port Displaying Port Tracking InformationInformation AboutForceful Shutdown Forcefully Shutting Down a Tracked Port Switch# show interface fc1/1 Switch# show interface port-channelPort linked to interface fc1/1 Switch# show interface fc 1/5 Example 9-4 Displays a Forced Shutdown Configuration Bandwidth fairness Default settings Example configurations Port 10-Gbps switching modulesAsterisk First operational port IN-2 IN-3 Deleting from PortChannels MPS-14/2 modules Configuring extended BBcredits Configuring descriptions IN-5 IN-6 TL ports Alpa caches Configuring Trunk mode Administrative default ConfiguringStatus Trunk ports Displaying information IN-8