KTI Networks KGS-612F Vlan Group Table Configuration, Vlan Classification, Packet Forwarding

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3.3.5 VLAN Group Table Configuration

The switch provides a table of eight VLAN groups to support up to eight VLANs at the same time. Each VLAN group is associated to one unique VLAN. The table is referred for VLAN classification.

A VLAN group contains the following configuration settings:

VID : 12-bit VLAN Identifier index to the VLAN to which the group is associated

Member Ports : the admitted egress ports for packets belonging to this VLAN

Source Port Check : the ingress port of the packet must also be the member port of this VLAN. Otherwise, the packet is discarded.

3.3.6 VLAN Classification

VLAN classification is a process to classify a VLAN group to which a received packet belongs. The VID of the generated Packet Tag information associated to the received packet is used as an index for VLAN group table lookup. The VID matched VLAN group will be used for packet forwarding. If no matched VLAN group is found in table lookup, the packet is dropped.

Refer to section 3.2.4 for details about how the Packet Tag information is generated.

The member ports specified in the matched VLAN group are the admitted egress port range for the packet. The packet will never be forwarded to other ports which are not in the member ports.

The Source Port Check setting of the matched VLAN group is also referred. If it is enabled, the ingress port will be checked whether it is a member port of this group.

3.3.7 Packet Forwarding

The forwarding is a process to forward the received packet to one or more egress ports. The process uses the following information as forwarding decision:

•Member ports of the matched VLAN group : the egress port range for forwarding

•Source Port Check setting of the matched VLAN group : check ingress port membership

•The packet destination MAC address : for MAC address table loop up

•The switch MAC address table : to find the associated port where a MAC address is learned

If the MAC address table lookup is matched and the learned port is the VLAN member port, the packet is forwarded to the port (egress port). If the lookup failed, the switch will broadcast the packet to all member ports.

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Contents KGS-612F Page Trademarks Table of Contents Snmp Support Appendix. Factory Default Settings 802.1x Authentication Quality of ServicePlug and Play Fiber ConnectivityFeatures Product PanelsFront panel Rear panel Specifications LED IndicatorsFunction 10/100/1000 Copper PortsLED Indicators Switch FunctionsSoftware Management Functions DC Power InputMechanical EnvironmentalSafety Cautions Mounting the Switch on a WallUnpacking Mounting the Switch on a Din-rail Chassis Applying PowerAC Power Adapter Specifications Making UTP Connections Reset ButtonConnecting Fiber Cables Installing SFP Fiber TransceiverFiber Port Configuration Making Fiber ConnectionConfiguring IP Address and Password for the Switch LED IndicationFunction State Interpretation #of bits Frame field AbbreviationUser priority Pvid Port VIDQoS Function Egress Service Policy Packet Priority ClassificationPriority Class Queues Keep Tag Per port setting 2.1 802.1Q Tag Aware Per port settingVlan Function Vlan OperationDrop Tag Per Port Setting Drop Untag Per Port SettingIngress Default Tag Per Port Setting Packet Tag InformationVlan Group Table Configuration Vlan ClassificationPacket Forwarding 802.1X Authentication Egress SettingsEgress Tagging Rules Summary of Vlan FunctionPage Start Browser Software and Making Connection Login to the Switch UnitWeb Browser Set IP Address for the System UnitMaintenance ConfigurationMain Management Menu MonitoringSystem CFI Configuration DescriptionSwitch Embedded Web Server operation Management VlanVlan Function Ports Configuration FunctionInformation Function SFP DDM StatusVLANs Vlan Configuration DescriptionPort-based Vlan Mode Port-based Vlan ISP Mode Mode OperationExample Advanced Vlan Mode Ingress Default Tag Ingress Settings Tag-ignore Tag-aware Received packet type Tag Aware =Tag-ignore Vlan Groups Switch Vlan Mode selection Important Notes for Vlan ConfigurationAggregation/Trunking configuration Double Tagged in Advanced Vlan ModeAggregation Lacp Rstp 10 802.1X Configuration Radius IP 10.1 802.1X Re-authentication Parameters Mirroring QoS Configuration Description Quality of ServiceClass 3 ~ Class 12.1 802.1p MappingDscp Mapping Weighted ratio priority Class 3210 = 1111 weighted ratio QoS Service PolicyStorm Control Statistics Description Statistics OverviewButton Description Detailed StatisticsStatus Description Lacp StatusStatus Description Ping Description PingRestore Default Reboot SystemUpdate Firmware LogoutSnmp Support Ports Configuration System ConfigurationVlan Configuration Port-based Vlan Mode settingLacp Port Configuration Rstp Port Configuration Rstp System Configuration802.1X Configuration Mirroring ConfigurationQoS Service Policy Quality of Service ConfigurationQoS 802.1p Mapping QoS Dscp MappingStorm Control Configuration