Flowcontrol no flowcontrol | SMC Networks SMC7724M/VSW guide

INTERFACE COMMANDS

flowcontrol

Use this command to enable flow control. Use the no form to disable flow control.

Syntax

flowcontrol no flowcontrol

Default Setting

Flow control enabled

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

•Flow control can eliminate frame loss by “blocking” traffic from end stations or segments connected directly to the switch when its buffers fill. When enabled, back pressure is used for half-duplex operation and IEEE 802.3x for full-duplex operation.

•Flow control should not be used if a port is connected to a hub. Otherwise flow control signals will be propagated throughout the segment.

•To force operation to the mode specified in a flowcontrol command, use the no negotiation command to disable auto-negotiation on the selected interface.

Example

The following example enables flow control on port 5.

Console(config)#interface ethernet 1/5

Console(config-if)#flowcontrol

Console(config-if)#no negotiation

Console(config-if)#

Related Commands

capabilities (flowcontrol, symmetric)

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Image 209

SMC Networks SMC7724M/VSW manual Flowcontrol no flowcontrol, Flow control enabled, Capabilities flowcontrol, symmetric

Contents

TigerAccess Extended Ethernet System Page TigerAccess Extended Ethernet System Management Guide Trademarks Contents Contents Iii Command Line Interface Contents Contents Contents Vii Viii Configuration Options Connecting to the Switch Switch Management Required Connections Remote Connections Console Connection Basic Configuration Setting Passwords Manual Configuration Setting an IP Address Switch Management Dynamic Configuration Community Strings Enabling Snmp Management Access Trap Receivers Managing System Files Saving Configuration Settings System Defaults Function Parameter Default Following table lists some of the basic system defaults Pvid EFM Rdsl Using the Web Interface Configuring the Switch Configuring the Switch Home Navigating the Web Browser Interface Button Action Main Menu Panel Display STA Vlan Port Igmp Fields and Attributes Displaying System Information Specify the hostname, location and contact information Command Line InterfaceWeb Interface Setting the IP Address Using DHCP/BOOTP Manual Configuration Web Interface Command Line Interface Configuring the Login Password Enter the following command to restart Dhcp serviceSecurity Renewing Dchp Configuring Radius Logon Authentication Click System/Radius Managing Firmware Downloading System Software from a Server Command Usage Saving or Restoring Configuration Settings To start the new firmware, reboot the system Web Interface Setting the Startup Configuration File Web Interface Copying the Running Configuration to a File Web Interface Use the reload command to reboot the system ResetDisplaying Bridge Extension Capabilities Example Click System/Bridge Extension Fields and Attributes Main Board Displaying Switch Hardware/Software VersionsEnter the following command Use the following command to display version information Click System/Switch Information Displaying Connection Status Port Configuration This example shows the connection status for Port Configuring Interface Connections Web Interface Select the interface, and then enter the required settings Setting Broadcast Storm Thresholds Configuring Port Mirroring Click Port/Port Security Configuration Configuring Port Security Displaying the Address Table Address Table Settings Command Line Interface Setting Static Addresses This example also sets the aging time to 400 seconds Changing the Aging Time Global setting apply to the entire switch Spanning Tree Protocol ConfigurationManaging Global Settings Configuring the Switch Click Spanning Tree/STA Information Displaying the current global settings for STA Web Interface Configuring the global settings for STA Web Interface Managing Interface Settings Click STA/STA Trunk Information or STA Port Information This example shows the STA attributes for port This example sets the STP attributes for port Vlan Configuration Assigning Ports to VLANs Forwarding Tagged/Untagged Frames This example enables Gvrp for the switch Enabling or Disabling Gvrp Global Setting Click VLAN/VLAN Base Information Displaying Basic Vlan Information Web Interface Fields and Attributes Displaying Current VLANs 104 Command Line Interface Fields and Attributes This example creates a new Vlan Creating VLANs Adding Interfaces Based on Membership Type 102 Adding Interfaces Based on Static Membership Configuring Vlan Behavior for Interfaces Creating Vlans 100 Configuring Uplink and Downlink Ports Configuring Private VLANsThis example enables private VLANs Enabling Private VLANs 9-16 17-24 25 Creating Vlans Command Line Interface Setting the Default Priority for Interfaces Class of Service Configuration This example assigns a default priority of 5 to port Priority Level Traffic Type Mapping Priority Classes to Egress Queues Fields and Attributes 127 Queue Scheduling Click Priority/Queue Scheduling Mapping Layer 3/4 Priorities to CoS Values Mapping IP Precedence Web Interface 131 Mapping Dscp Priority Web Interface Mapping IP Port Priority 130 Copy Priority Settings Port Trunk Configuration Port Trunk Configuration 142 Configuring Snmp Access Mode Setting Community Access Strings Specifying Trap Managers Configuring Igmp Parameters Multicast Configuration Multicast Configuration Web Interface 117 Interfaces Attached to a Multicast Router Specifying Interfaces Attached to a Multicast Router 122 Displaying Port Members of Multicast Services Adding Multicast Addresses to VLANs Showing Device Statistics Showing Device Statistics This example shows statistics for port Rate Limit Configuration 163 Vdsl Global Configuration Vdsl Configuration Fields and Attributes Click VDSL/VDSL Global Configuration Vdsl Port Configuration 100 Click VDSL/VDSL Port Configuration 101 Configuring a User-specified EFM Profile Click VDSL/VDSL Profile User Specified 102 103 Vdsl Port Link Status Click VDSL/VDSL Port Link Status 104 156 105 Click VDSL/VDSL Port Ethernet Statistics Displaying Vdsl Port Ethernet Statistics106 107 108 Accessing the CLI Using the Command Line Interface Telnet Connection Keywords and Arguments Entering CommandsThis section describes how to enter CLI commands Minimum Abbreviation Command CompletionGetting Help on Commands Command show interfaces ? displays the following information Showing Commands Partial Keyword Lookup Negating the Effect of CommandsUsing Command History Exec Commands Understanding Command Modes Configuration Commands Keystroke Function Command Line Processing Command Description Group Command Groups 163 LC Line Configuration, VC Vlan Database Configuration General Commands Syntax enable level EnableDefault Setting Command Mode Related Commands Disable Show history ConfigureEnd Normal Exec, Privileged Exec Reload Use this command to restart the systemThis command resets the entire system Use this command to return to Privileged Exec mode This example shows how to reset the switchEnd Exit Quit Use this command to exit the configuration programThis example shows how to quit a CLI session Copy Flash/File Commands Privileged Exec Following example shows how to download a configuration file Filename Name of the configuration file or image name Use this command to delete a file or imageDelete Syntax Dir Use this command to display a list of files in Flash memorySyntax Dir boot-rom config opcode filename Following example shows how to display all file information Whichboot Syntax Boot system boot-rom config opcode filename Boot systemGlobal Configuration Dir whichboot Command Function Mode System Management Commands Name The name of this host. Maximum length 255 characters HostnameSyntax Hostname name no hostname Username Default is level Default password is super Enable password Ip http port Default Setting Command ModeSyntax Ip http port port-numberno ip http port Ip http server Syntax Logging on no logging on Default Setting Syntax Ip http server no ip http server Default SettingIp http server Logging on Logging history clear logging Logging history Snmp-server enable traps snmp-server host Flash errors level 3 RAM warnings level 7Use this command to clear messages from the log buffer Clear logging Syntax Show logging flash ram Show loggingShow logging Show running-config Show startup-config Show startup-config Show running-config Show users Use this command to display system informationShow system Show version Authentication login Radius Commands Hostipaddress IP address of server Enable password for setting the local passwordRadius-server host Radius-server key Radius-server portSyntax Radius-server port portnumber no radius-server port Syntax Radius-server key keystring no radius-server key Radius-server retransmit Radius-server timeout Show radius-server Snmp Commands Snmp-server community Snmp-server location Snmp-server contactSyntax Snmp-server contact string no snmp-server contact Syntax Snmp-server location text no snmp-server location Snmp-server host Issue all traps Snmp-server enable traps Show snmp Use this command to check the status of Snmp communications Command Usage IP Commands IP address Netmask Interface Configuration VlanIp address Ip dhcp restart Use this command to submit a Bootp or Dchp client request Syntax Ip default-gateway gateway no ip default-gateway Ip default-gatewayGateway IP address of the default gateway Following example defines a default gateway for this device Show ip interface Use this command to display the settings of an IP interfaceShow ip redirects All interfaces Syntax Ping host size sizecount count This command has no default for the hostPing Interface Line Commands Syntax Login local no login LoginLine Syntax Line console vty Line Configuration PasswordUsername password Syntax Password 0 7 password no password Login password-thresh Exec-timeoutSyntax Exec-timeout seconds no exec-timeout CLI No timeout Telnet 10 minutes To set the timeout to 120 seconds, enter this command Password-threshSyntax Password-thresh threshold no password-thresh Default value is three attempts To set the silent time to 60 seconds, enter this command Default value is no silent-timeSilent-time Syntax Silent-time seconds no silent-time Databits To specify 7 data bits, enter this commandSyntax Databits 7 8 no databits Seven data bits per character Eight data bits per character Speed ParitySyntax Parity none even odd no parity Syntax Speed bps no speed To specify 2 stop bits, enter this command To specify 57600 bps, enter this commandStopbits 9600 bps To show all lines, enter this command Use this command to display the terminal line’s parametersShow line Syntax Show line console vty Interface Commands Description Interface Following example adds a description to Ethernet port Interface Configuration Ethernet, Port ChannelSpeed-duplex Negotiation no negotiation Negotiation Capabilities Following example enables flow control on port Flow control enabledFlowcontrol Flowcontrol no flowcontrol Shutdown Port-channel channel-idRange Default SettingClear counters Following example disables Vdsl port Switchport broadcastInterface Configuration Ethernet Packets per second Syntax Show interfaces status interface Use this command to display the status for an interfaceShow interfaces status Show interfaces counters Use this command to display interface statistics Shows all interfaces Show interfaces switchport Bridge address Address Table Commands Action Bridge-group- Bridge group index bridge Show bridge Bridge-group aging-time Clear bridgeSyntax Clear bridge bridge-group Seconds Show bridge group aging-time This example enables port security for port All port security is disabledPort security Port security no port security Spanning Tree Commands Bridge spanning-tree Spanning tree is enabled Bridge forward-time Use this command to configure globally for this switch. Use Bridge hello-time Bridge max-age 32768 Bridge priority Bridge-group path-cost 128 Bridge-group priority Bridge-group portfast Disabled Show bridge group Use this command to show the spanning tree configuration Vlan Commands Vlan database Vlan Database Configuration By default only Vlan 1 exists and is activeVlan Show vlan Syntax Interface vlan vlan-id Interface vlan Syntax Switchport mode trunk hybrid no switchport mode Switchport modeAll ports are in hybrid mode with the Pvid set to Vlan Configures Vlan membership mode for a port Switchport ingress-filtering Switchport acceptable-frame-typesSwitchport mode All frame types Switchport native vlan Switchport allowed vlan No VLANs are included in the forbidden list Switchport forbidden vlan Following example shows how to display information for Vlan Use this command to show Vlan informationShow vlan Syntax Show vlan id vlan-idname vlan-name For the two commands Disabled with no Pvlan interfaces Pvlan CommandsPvlan Syntax Pvlan For the 12-Line Vdsl Switch Show pvlan Syntax Show pvlan Command Mode Gvrp and Bridge Extension Commands Show gvrp configuration Switchport gvrpSyntax Switchport gvrp No switchport gvrp Default Setting 109 110 Garp timer Show garp timer Show garp timerShows all Garp timers 111 Bridge-ext gvrp Garp timer112 Bridge-ext gvrp no bridge-ext gvrp 113 Show bridge-ext 114 Igmp Snooping Commands Ip igmp snooping Following example enables Igmp snoopingIp igmp snooping vlan static 115 Igmp Version Ip igmp snooping version116 117 Show ip igmp snoopingShow bridge multicast Ip igmp snooping querier no ip igmp snooping querier Ip igmp snooping querier118 Ip igmp snooping query-count Following shows how to configure the query count toIp igmp snooping query-interval 119 120 Seconds The report delay advertised in Igmp queries. RangeIp igmp snooping query-max-response-time Ip igmp snooping query-time-out Switch must be using IGMPv2 for this command to take effect121 Ip igmp snooping version 122 No static multicast router ports are configuredIp igmp snooping vlan mrouter Show ip igmp snooping mrouter Displays multicast router ports for all configured VLANs123 Syntax Show ip igmp snooping mrouter vlan vlan-id 124 Priority Commands 125 Switchport priority default 126 Queue bandwidth Show queue bandwidth Queue cos-map127 Show queue cos-map 128 Show queue bandwidth Use this command to show the class of service priority mapShow queue cos-map 129 Map ip port no map ip port Map ip port Global Configuration130 Map ip precedence Global Configuration Map ip port Interface Configuration131 Map ip precedence no map ip precedence 132 Map ip precedence Interface ConfigurationList below shows the default priority mapping Map ip dscp no map ip dscp Map ip dscp Global Configuration133 134 Map ip dscp Interface Configuration Show map ip port Use this command to show the IP port priority map135 Map ip port Maps CoS values to IP ports i.e., TCP/UDP ports Show map ip precedence Use this command to show the IP precedence priority map136 Map ip precedence Maps CoS values to IP precedence values Show map ip dscp Use this command to show the IP Dscp priority map137 Map ip dscp Maps CoS values to IP Dscp values Interface Configuration Ethernet, destination port Mirror Port CommandsPort monitor 138 Show port monitor 139 Syntax Show port monitor interface Show port monitor140 141 Port Trunking Commands Channel-group Interface port-channel142 Syntax Channel-group channel-idno channel-group No default Use this command to show trunk informationShow interfaces status port-channel 143 144 LacpFollowing shows information on Trunk Lacp no lacp 145 146 Vdsl Commands 147 Efm profile globalSyntax Efm profile global profile name Profile name Name of the profile 148 149 Efm profileEfm profile Syntax Efm profile profile name Efm define user-profile Interleaving is disabled150 Efm profile global efm profile Syntax Efm reset local remote Efm resetUse this command to troubleshoot EFM port performance Efm shutdown Efm rdl Syntax Efm rdl no efm rdl Default Setting152 Off Rate-limit global rate-limit Efm flow-control153 154 Show controllers ethernet-controllerSyntax Show controllers ethernet-controller interface-id Interface-id- ID of the EFM port Clear controllers ethernet-controller 155 156 Show controllers efm interface-id actual 157 Show controllers efm interface-id adminSyntax Show controllers efm interface-idadmin dsrate usrate Syntax Show controllers efm profile mapping names Show controllers efm profile158 Examples 159 160 Show controllers efm status 161 Use this command to display the connected CPE Ethernet mode Show controllers efm remote ethernet modeTo obtain the Ethernet mode from CPE side Vdsl chip 162 Rate-limit global Rate Limit Commands163 Rate-limit input no rate-limit input 164 Rate-limit interfaceSyntax Rate-limit input rate Rate The rate unit is Mbps Troubleshooting Chart Appendix a Troubleshooting Upgrading Firmware via the Serial Port Upgrading Firmware VIA the Serial Port Troubleshooting DB-9 Port Pin Assignments Console Port Pin Assignments Console Port to 25-Pin DTE Port on PC Console Port to 9-Pin DTE Port on PC Auto-negotiation Glossary-11000BASE-T Glossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Index-1 Index Index-2 Page For Technical SUPPORT, Call