KTI Networks KSD-800M Vlan Group Mapping, Packet Forwarding under Vlan, Egress Tagging Rules

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3.2.3 VLAN Group Mapping

The VLAN group mapping is the switch’s decision process to find a right VLAN group for the re- ceived packet when it is not filtered by ingress rules. The group mapping depends on the VLAN mode and the packet type. The following table lists the decision rules:

VLAN Mode

Packet Type

Mapping Method

802.1Q Tag Aware

Tagged & non-Null

Use packet’s VID to loop up VLAN group table

 

 

Matched - use the group matched

 

 

Unmatched - drop the packet

802.1Q Tag Aware

Null VID

Use ingress port’s default VLAN group directly

802.1Q Tag Aware

Untagged

Use ingress port’s default VLAN group directly

Port-based VLAN

Tagged

Use ingress port’s default VLAN group directly

Port-based VLAN

Untagged

Use ingress port’s default VLAN group directly

3.2.4 Packet Forwarding under VLAN

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

•The mapped VLAN group’s member ports : the port range for forwarding

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

•The switch’s MAC address table : to find the associated input port for a learned MAC address

If the MAC address table lookup is matched and the associated port is the VLAN member port, the packet is forwarded to the port (egress port). If the lookup is not matched, the switch will broadcast the packet to all member ports.

3.2.5 Egress Tagging Rules

Egress Tagging rules are used to make change to the packet before it is transmitted out from an egress port. Two egress tagging settings are provided for each port and are described as follows:

3.2.5.1 Egress Tag Rule (per port setting)

Four basic options are provided for egress tagging :

1. Tagging with PVID for all packets

Untagged packet : the packet is inserted with the associated ingress port’s PVID as tag VID

Tagged packet : the packet’s tag VID is replaced with ingress port’s PVID as new tag VID

2. Untagging for all packets

Untagged packet : the packet is not modified

Tagged packet : the packet’s tag VID is removed and becomes an untagged packet

Null VID packet : depending on Null VID Replacement setting in next section

3. PVID insertion for untagged packets only

Untagged packet : the packet is inserted with the associated ingress port’s PVID as tag VID

Tagged packet : the packet is not modified

4. No tag insertion and tag removal

The packet is not modified at all. No tag insertion or tag removal are performed for all packets.

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Contents KSD-800M Installation GuidePage Trademarks Table of Contents Snmp Management Auto Copper/Fiber Connections IntroductionModel series 10/100TX TP Ports 100FX fiber ports Plug and PlayManagement functions FeaturesDesigned for Industrial Applications Basic functionsProduct Panels Network Ports Front PanelFunction LED IndicatorsTop Panel SpecificationsLED Indicators Switch Functions10/100TX Twisted Pair Ports QoS Function Port Configuration Control FunctionSoftware Management Functions Vlan FunctionEnvironmental DC Power InputModel Definitions MechanicalOptical Specifications Safety Cautions InstallationUnpacking DIN-Rail Mounting Panel Mounting Page Using Terminal Blocks Applying PowerUsing DC Power Jack Power Failure Relay OutputMaking UTP Connections Reset ButtonMaking Fiber Connections Far End Fault FunctionFunction State Interpretation LED IndicationConfiguring Port 7 and Port Configuring IP Address for the SwitchConfiguring User Name and Password Configuring Snmp SettingsPriority Level Egress Service PolicyAdvanced Functions QoS FunctionUser Defined Dscpa Classification Global Port-based Priority Setting per port setting3.2 802.1p Classification per port setting Dscp Classification per port settingUser Defined IPB Classification Global Other QoS SettingsIP Network Address Classification User Defined IPA Classification GlobalVlan Operation Vlan FunctionIngress Rules 2.1 802.1Q Tag Aware Vlan Mode global settingIngress Member Filtering global setting Unmatched VID Filtering per port settingEgress Tagging Rules Egress Tag Rule per port settingVlan Group Mapping Packet Forwarding under VlanSummary of Vlan Function Null VID Replacement per port settingTelnet Management Interface Software ManagementMain Menu IP Menu IP Settings DescriptionSnmp Menu Snmp Settings DescriptionStatus Description Port ConfigAdministrator Vlan Settings AdministratorPort Setting Description Vlan ID Vlan Information DescriptionVID Setting Description Vlan Global Settings DescriptionInput Description Tagging with ingress Pvid for all packets Per Port Settings DescriptionAdministrator QoS Settings Select 1 Show QoS Other Status to view other settings global QoS Other Settings Description Security Manager Restore Default ValuesExit Update FirmwareReboot System Setting DescriptionWeb Management Login to the Switch UnitStart Browser Software and Making Connection Page Port Status Description Port Status MenuMenu Function Basic MenuSystem Settings Description IP Address IP Address Setting DescriptionSnmp Entries Community Settings Description Port Settings Description Trap Manager Settings DescriptionPort Controls Vlan Controls Vlan Group Configuration Global Settings DescriptionIngress Rules Group Settings Description Per Port Settings Insertion for untagged packets only is selected Egress RulesQoS Controls QoS Per Port Settings DescriptionQoS Global Settings Description IPA address and IPA subnet mask specify IPA user defined Image Refresh Time Settings DescriptionRestore Default Objects Snmp ManagementMIB Objects Snmp TrapsAppendix. Factory Default Settings QoS Settings
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