Lantronix SW 94000 manual Vlan Classification, Learning, Filtering

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2: Product Overview

Notes:

‹Half-duplex mode uses back pressure flow control to prevent the receiving buffer from being overrun by data from a source node.

‹Full-duplex mode uses 802.3x flow control standard to prevent fast data traffic from overrunning slow data traffic.

‹Auto-sensing mode is in use after auto-negotiating with the other end of the link.Basic Functions

In general, the Xpress-Pro SW 94000 switch is responsible for switching both VLAN tagged and untagged frames from a receiving port to one or more transmitting ports. The Xpress-Pro SW 94000 switch performs multiple steps during the switching process:

‹VLAN classification

‹Learning

‹Filtering

‹Forwarding

‹Aging

Below is additional information about tasks that the Xpress-Pro SW 94000 switch performs during unicast and multicast switching.

UNICAST SWITCHING

VLAN Classification

When the Xpress-Pro SW 94000 switch receives a frame, it classifies the frame in one of two ways:

If the frame is untagged, the Xpress-Pro SW 94000 switch classifies the frame to an associated VLAN.

If the frame is tagged, the Xpress-Pro SW 94000 switch uses the tagged VLAN ID to identify the broadcasting domain of the frame.

Learning

After VLAN classification, the Xpress-Pro SW 94000 switch checks the <source MAC address, VLAN> pair in the switching database (SDB) to see whether the <source MAC address, VLAN> pair is known.

If it is unknown, the Xpress-Pro SW 94000 switch inserts the <source MAC address, VLAN> into the SDB and learns the <source MAC address, VLAN>.

If it is known, the Xpress-Pro SW 94000 switch checks the <source MAC address, VLAN> for a mismatched port ID. If the port ID associated with the <source MAC address, VLAN> pair in the SDB is different than the receiving port, the switch modifies the port ID in the SDB and modifies its management database (MDB) accordingly.

Filtering

After learning the address, the Xpress-Pro SW 94000 switch checks:

Whether the source port or destination port is in the forwarding state.

XPress-Pro SW 94000 User Guide

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Contents XPress-Pro SW 94000 User Guide Copyright & Trademark Contents Switch Management Specifications and Standards 104 Connector Pinouts 106 Preface Product Highlights Xpress-Pro SW94000 SwitchPackage Contents Management Support Network Management Methods Front Panel DisplayInternetworking Protocols Connectivity Mode SelectionPhysical Ports Filtering Vlan ClassificationLearning Forwarding Multicast SwitchingSpanning Tree AgingDefinitions of Vlan Membership Vlan Membership Learning Enhanced SecurityVlan Membership Vlan implementation allowsInter-VLAN Communication Igmp Snooping and IP Multicast FilteringIntra-VLAN Communication External SNMP-based network management application Switch ManagementAdministration console via RS-232 serial port Web-based browser interfaceDIN Rail Mounting Selecting a Site for the Switch12VDC DC Jack Connecting to PowerRedundant DC Terminal Block Power Inputs Download runtime software from serial port0 Alarms for Power FailurePower-on Self test Post Cable Type & Length Connecting to Your NetworkConfigure the system Run manufacturing diagnosticsCabling Disadvantages Management Access OverviewAdministration console via RS-232 serial port AdvantagesExternal SNMP-based network management application Administration ConsoleDirect Access Web-based browser interfaceNetscape Navigator Modem AccessWeb Management Internet Explorer SNMP-Based Network ManagementProtocols Management ArchitectureSwitch Management At the screen prompt Logging on to the switchLogin name PasswordAdvanced Management Switch Management ScreenSave Settings Basic ManagementNavigating Through the Console Interface Restore Default SettingsReboot Performing Basic Management ActivitiesGeneral Management Configurations LAN Port Configurations Menu-Driven Console Management Menu-Driven Console Management Console Port Configurations To Perform Advanced Management Activities Performing Advanced Management ActivitiesPort Trunking Qos setupL2 Switching DataBase Vlan & Pvid Perspective Other ProtocolsMenu-Driven Console Management For example Menu-Driven Console Management Menu-Driven Console Management Menu-Driven Console Management Menu-Driven Console Management Menu-Driven Console Management Menu-Driven Console Management Menu-Driven Console Management IP Networking Menu-Driven Console Management Menu-Driven Console Management Bridging Menu-Driven Console Management Menu-Driven Console Management Rapid Spanning Tree Protocol Menu-Driven Console Management Menu-Driven Console Management Snmp Functions Menu-Driven Console Management Other Protocols Port Trunking Port Mirroring QoS Setup Menu-Driven Console Management Vlan Menu-Driven Console Management File Transfer Menu-Driven Console Management Menu-Driven Console Management Logout Save SettingsRestore Default Settings RebootLogin ID Switch IP AddressTo perform File Activities Understanding the Browser InterfacePerforming File Activities Web-Based Browser Management To perform Basic Setup Activities Performing Basic Setup ActivitiesWeb-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management To perform Advanced Setup Activities Performing Advanced Setup ActivitiesWeb-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Tpid Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Snmp Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Vlan Web-Based Browser Management Web-Based Browser Management Web-Based Browser Management Snmp Agent and MIB-2 RFC OverviewRmon Groups Supported Rmon MIB RFC 1757 and Bridge MIB RFCSnmp & Rmon Management Specifications and Standards Specifications and Standards Connector Pinouts