Tagged and Untagged Frames | Asante Technologies 8000 manual

Advanced Management

A VLAN localizes flooded traffic to parts of LAN segments rather than to a whole LAN. VLANs offer a simple and efficient solution that enhances network performance, bandwidth utilization, and network security by localizing flooded traffic.

Port-based VLANs are the simplest of many VLAN approaches that solve the problem of unnecessary flooding. A port-based VLAN allows the administrator to assign individual ports on a switch to a VLAN. Any broadcast, multicast, or unknown unicast traffic received on a port in a VLAN is flooded only to the other ports in the VLAN rather than to all ports in the system. This greatly reduces unnecessary traffic in a network.

For the most complete information about configuring VLANs in an 802.1Q environment, see the standard, available from IEEE <http://www.ieee.org>.

Tagged and Untagged Frames

In a network with only one switch, the switch itself can keep track of which ports belong to which VLANs.

In a network with multiple switches, information about which VLAN an ethernet frame belongs to must be sent along with the frame. This is done by inserting a tag field in the frame, as defined in IEEE 802.1Q. The tag includes the VID to identify the frame’s VLAN. When a port receives a tagged frame, it can then pass the frame to other port members of the same VLAN.

When you add a port to a VLAN, you can specify whether or not frames originating from that port will be tagged. If the port is configured to send tagged frames, then its traffic will be associated with the VLAN identified in the tags.

If it receives an untagged frame, a port has no way to determine the originating VLAN. In that case, the port can be configured to send the frame as is, to aribtrarily assign a specific tag to the frame, or to drop the frame.

Abbreviations

The following abbreviations are used throughout this section.

FID	Filtering ID
GARP	Generic Attribute Registration Protocol
GVRP	GARP VLAN Registration Protocol
ISL	Inter-Switch Link
MGMT	Management

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Asante Technologies 8000 user manual Tagged and Untagged Frames, Abbreviations

Contents

IntraCore Limited Five Year Warranty Table of Contents Viewing Legends for Configuration Settings Configuration Unicast Forwarding Database Configuration Advanced Management Web Browser Management Technical Support MIB StatisticsPage Core Switching Engine IntraCore Architecture Overview LAN Infrastructure ConnectivityNetwork Management, Security, Performance, and Control MAN/WAN IntraCore Product Family Mance Edge Switches Enterprise Switches Expansion Modules Port 10/100 Switch ModuleIntraCore IntraCore 1000BaseLX Long Haul Gbic Gigabit Ethernet Switch Module1000Base SX Gbic 1000BaseLX Gbic Feature Description FeaturesFeatures Introduction Feature Description VLANs Configuration Default Setting Defaults and SpecificationsDefaults and Specifications LEDs Color and Meaning Environmental Requirements Installation GuidelinesPower Requirements Cooling and Airflow Installation Overview Step Action to Be Taken Safety Precautions for Rack Installation Chassis Installation/PlacementInstallation in an Equipment Rack Equipment Rack Guidelines Free-Standing/Desktop Placement Equipment Rack Installation Procedure Three or Four Stack Configuration Stacking SwitchesTwo Stack Configuration Stacking Switches Four stack configuration Installing Port Expansion Modules Installing Port Expansion Modules Removing a Gbic Installing Gbic InterfacesInstalling a Gbic Gbic Care and Handling Connecting PowerConnecting Power Connecting To Cable Required Connecting to the Network10/100BaseX Ports Cabling Procedures BootP Configuration Configuring for Management1000BaseX Ports Cabling Procedures Configuring for Management Connecting To a Console Management Options Management OptionsOut-of-Band Management Method Type Description In-Band Management Telnet Web Browser SNMP-Based Management Installation and Setup Configuration Local Management Interface Logging Exiting a Submenu Accessing a SubmenuMain Menu Local Management Interface Viewing General Information 4MB Setting Description Viewing General Information Menu Item Description Configuration MenuConfiguration Menu Options Configuration Menu Snmp Configuration Changing System Administration Info System Administration ConfigurationCurrent Settings System IP Configuration System IP Configuration Describes each setting on the System IP Configuration Menu Changing System IP Information Image Banks Bootstrap ConfigurationBootstrap Configuration Loading Software Locally Remote Bootstrap Configuration Menu Loading Software Remotely Current Settings Date Rently running on the IntraCore Load Mode Bootstrap Configuration Snmp Configuration Empty Snmp Configuration Changing Community Strings Enabling Authentication Traps Adding or Updating a Trap Receiver Deleting a Trap Receiver Port ConfigurationPort Configuration 10 Port Configuration Menu for 10/100BaseTX modules Viewing Legends for Configuration Settings 11 Legends for all Port Configuration Menus Current Port Settings Enabling or Disabling a Port Configuring Auto-Negotiation Toggling Half to Full Duplex Configuring a Port ManuallyToggling Port Link Speed Configuring 1000BaseX Ports 12 Port Configuration Menu for 1000BaseX ports Enabling or Disabling a Port Advanced Port Configuration Advanced Port ConfigurationAdvanced 10/100BaseTX Port Configuration Advanced 1000BaseX Port Configuration 14 Advanced Port Configuration Menu 1000BaseX port Setting the Maximum Broadcast or Multicast Rate Flow Control Enabling or Disabling 802.3x Flow Control Global Port Configuration Global Port ConfigurationSetting Port Default Priority 15 Global Port Configuration Menu 10/100BaseTX ports Unicast Forwarding Database Configuration Unicast Forwarding Database Configuration Displaying the Forwarding Database Age-out Time Unicast Forwarding Database Configuration Searching for a MAC Address MPT Setting the MAC Address Age-Out Time 20 MAC Address Search summary Image File Downloading Configuration 21 Image File Downloading Configuration Menu Image File Downloading Configuration Image Downloading Through Tftp 10 describes each setting on the Tftp Image Downloading Menu Performing a Software Upgrade at Runtime Serial Downloading Configuration 23 X/Y/Z Modem Image File Downloading Menu Performing a Software Upgrade 24 Baud Rate Menu System Reset Configuration System Reset Configuration Option Description Resetting the IntraCoreCurrent Options Viewing the System Log Scheduling a System ResetViewing the System Log Clearing the System Log 26 System Log Menu User Interface Configuration User Interface Configuration Configuration Setting Description Changing the Password Setting Console Idle Time-out PeriodSetting Telnet Idle Time-out Period Page Viewing Statistics 29 Systems Module Map Configuration 31 Port Statistics Counters since reset Configuration Spanning Tree Protocol Overview How It Works Enabling and Disabling STP Bridge Priority Configuring Spanning Tree ParametersSpanning Tree Parameters Hello Time Port Priority Forward DelayMaximum Age Current STP Settings ID is the Bridge Priority. If the Bridge ID is shown as Spanning Tree Port Configuration Setting Port Priority and Path Cost Snmp and Rmon Management Snmp and Rmon Management Ethernet Statistics Group Alarm GroupRmon Management Ethernet History Group Security Option Description Action Security ManagementSecurity Management Security Traps Enabling and Disabling Duplicated IP Trap Duplicated IP Detection and TrapEnabling and Disabling Duplicated IP Detection Viewing a List of Duplicated IP Addresses Enabling and Disabling Station Movement Trap Similar to Figure Configuring Port Security Port Security Configuration Menu Configuring Port New Node Detection Trap Advanced Management Setting Description Configuring Port Lock and Intruder Lock Configuring Security Level 2 or Level Inserting/Modifying a Port Trusted MAC Address Setting the Intruder TrapResetting Security to Defaults Vlan Specifications for the IntraCore Vlan Management Benefits of Vlan Management Other Vlan Features in IntraCoreOverview of VLANs Vlan Management Tagged and Untagged Frames Abbreviations Port Vlan ID Default VlanVlan Groups Vlan Port Membership and Untagging Independent vs. Shared Learning Inter-Switch Links Port Receive Ingress VLANs Untagset Frame Type Filter All Frames Disabled Yes Configuring Vlan Management Describes each setting on the Vlan Management Menu Configuring Static Vlan Groups FID Creating a Vlan Vlan Index Naming a Vlan Enabling and Disabling Management AccessRemoving a Vlan Adding Port Members Moving Ports to This Vlan Advanced Static Vlan ConfigurationDeleting Port Members Specifying Tagging or No Tagging for a Port Specifying Shared or Independent Address Learning Inserting and Removing MAC Addresses Configuring Vlan Port Attributes 10 Vlan Port Configuration Menu Setting the Port Vlan ID Enabling and Disabling Port Ingress Filtering Configuring Port Receive Frame TypeAdding and Deleting VLANs from the Port Adding an ISL Port to VLANs Configuring Inter-Switch LinksEnabling and Disabling Port Gvrp Status Configuring Tagging for the ISL Port on Each Vlan Configuring the ISL Port to Receive Tagged Frames Displaying a Summary of Vlan Groups Displaying a Vlan Port Summary Displaying a Vlan FID-VID Association Summary Resetting Vlan Configuration to DefaultsConfiguring Gvrp 15 Gvrp Configuration Menu Disabling Gvrp on a Group of Ports Enabling and Disabling System GvrpEnabling Gvrp on a Group of Ports Configuring Vlan Forbidden Sets 16 Vlan Forbidden Set Configuration Menu Configuring Registration Fixed Sets 17 Vlan Registration Fixed Set Configuration Menu Multicast Traffic Management Multicast Addresses Gmrp Garp Multicast Registration Protocol IP Multicast Quality of Service RsvpIgmp Snooping Multicast Traffic Management Configuring Multicast Traffic Management 18 Multicast Traffic Management Menu Enabling and Disabling Igmp Snooping Enabling and Multicast Poliocy-based Quality of ServiceEnabling and Disabling Gmrp Displaying a Summary of Group Addresses Multicast Forwarding Database Configuration 19 Summary of Group Addresses Removing a Multicast Group Address Adding ports to the Selected AddressInserting a Multicast Group Address Advanced Management Accessing with a Web Browser Web Browser Management Web Browser Management Overview Front Panel Button Port Activity IndicatorManagement Buttons Front Panel Display Port Selector Feature Port Configuration and Statistics Genl Info General Information Button Genl Info General Information Button Statistics Bar Chart Statistics Button Line chart of received frames for a port Statistics Button -7 the counters for a port are displayed in bar graph form Bar graph of counters for a port Port Config Port Configuration Button Port Configuration table Span Tree Spanning Tree Button Span Tree Spanning Tree Button 10 Snmp Configuration Snmp Button Addr Address Table Button Addr Address Table Button Port Configuration Vlan Button Vlan Configuration Vlan Button 14 Vlan Group Configuration options Creating or Modifying a Vlan Adding and Deleting Port Members 16 Add/Delete Port Member dialog box Duplicate IP Button Duplicate IP Button Web Browser Management Technical Support Contacting Technical Support A-2 Readable Frames FCS ErrorsMIB Object Definitions for Counters Readable Octets Short Events Alignment ErrorsFrame Too Longs MIB Object Definitions for Counters RuntsCollisions Late Events Auto Partitions Very Long EventsMismatches Total Errors