Ruby Tech GS-1224L manual Cfi, Tag Format

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User Manual

There are many types of VLAN applied. Most popular is port-based VLAN, tag-based VLAN and protocol-based VLAN.

Port-based VLAN

Some physical ports are configured as members of a VLAN. All stations attached on these ports can communicate with each other.

Tag-based VLAN

It identifies the membership by VLAN ID, no matter where the packet comes from. It is also referred to as 802.1Q VLAN.

Protocol-based VLAN

It identifies the VLAN membership by layer 3 protocol types, for example IPX, Appletalk, IP, etc.

Other VLAN technologies not mentioned above are MAC-based VLAN, IP- based VLAN and so on.

Terminology Tagged Frame:

A frame, carrying a tag field following the source MAC address, is four bytes long and contains VLAN protocol ID and tag control information composed of user priority, Canonical Format Indicator (CFI) and optional VLAN identifier (VID). Normally, the maximal length of a tagged frame is 1522 bytes.

	802.1Q VLAN-tagged Ethernet frame
6	6	2	2	2
DA	SA	VLAN Protocol	Tag Control	Length
		ID	Information	/Type

VLAN Protocol ID =

0x8100

User Priority

CFI

VLAN identifier

Fig.3-9 Tag Format

VLAN Protocol ID: 8100 is reserved for VLAN-tagged frame.

User Priority: 3 bits long. User priority is defined to 7 – 0. 0 is the lowest priority.

CFI: Canonical Format Indicator. 1 bit long. It is used to encapsulate a token ring packet to let it travel across the Ethernet. Usually, it is set to 0.

VLAN ID: 12 bits long. 0 means no VLAN ID is present. 1 means default VLAN, 4095 reserved.

Publication date: March, 2007

Revision A1

41

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Contents Page Page GS-1224L Duration of Hardware Warranty Iii Table of Contents 100 02/10/2007 03/13/2007 Revision HistoryVii Federal Communications Commission FCC Statement Electronic Emission NoticesAbout this user’s manual Overview of 24-Port GbE Web Smart Switch Key Features in the DeviceVlan Management ChecklistFeatures HardwarePublication date March User Interfaces on the Front Panel Button, LEDs and Plugs View of 24-Port GbE Web Smart Switch10/100/1000Ethernet TP Port 1 to 24 LED LED IndicatorsUser Interfaces on the Rear Panel System LEDFront View of 1000Base-SX/LX LC, SFP Fiber Transceiver View of the Optional ModulesStarting 24-Port GbE Web Smart Switch Up Hardware and Cable InstallationConnecting the SFP Module to the Chassis Firmware Loading TP Port and Cable InstallationPower On Cabling RequirementsCabling Requirements for 1000SX/LX SFP Module Cabling Requirements for TP PortsTypical Network Topology in Deployment 1000Base-X TP, Fiber 100Base-TX TP 100Base-FX FiberNo Vlan Configuration Diagram Case 2b Port-based Vlan See -4 Publication date March Port GBE WEB Smart Switch Managing 24-Port GbE Web Smart Switch through Ethernet PortIP Address Assignment Login Screen for Web110 10000000.00000001.00000010.1 Prefix Length No. of IP matched No. of Addressable IP Publication date March 10 Network Connection between Remote Site and Central Site Typical Applications11 Peer-to-peer Network Connection What’s the Ethernet Basic Concept ManagementIEEE802.3 CSMA/CD MAC Snap STP BpduARP SAP Format Media Access Control MACFCS PRE SFDPublication date March How does a MAC work? Bytes DTE Flow Control Publication date March Revision A1 Bits How does a switch work? Collision Domain Publication date March Revision A1 Publication date March Virtual LAN Publication date March Tag Format CFIPublication date March Publication date March Revision A1 VID Link Aggregation 10 Example of Link Aggregation Application Operation of Web-based Management Web Management Home Overview Information of Page Layout Snmp Lacp RstpFunction description System ConfigurationPublication date March Publication date March Revision A1 ON/OFF Ports ConfigurationPort Configuration Vlan Mode ConfigurationSelect Vlan Mode VID Vlan Group ConfigurationAdd or Remove Vlan Member Port-Based Vlan Configuration Aggregation 10 Aggregation/Trunking ConfigurationLacp 11 Lacp Port ConfigurationRstp Rstp Port Configuration Publication date March Publication date March Revision A1 Publication date March Port Mode Port Control Authentication Port Status Radius IP 16 802.1X Configuration 802.1x Parameters Vlan ID Igmp Snooping20 Mirror ports configuration Mirror Configuration21 QoS Configuration QoSQuality of Service ConfigurationQoS Configuration Dscp Setting Dhcp Filter24 Filter Configuration Rate Limit 25 Rate Limit ConfigurationStorm Control 26 Storm Control ConfigurationPublication date March Parameters description Snmp27 Snmp Configuration Statistics Overview Monitoring28 Statistics Overview for all ports Detailed Statistics Publication date March 29 Detailed Statistics for each port 30 Lacp Status Lacp StatusRstp Status 31 Rstp Status Igmp Status 32 Igmp Status Ping Status33 Ping Maintenance 34 Warm Restart Warm RestartFactory Default 36 Software Upgrade Software UpgradeFunction description Configuration File TransferLogout Q&A Resolving No Link ConditionAppendix a Technical Specifications Cable and Maximum Length Network InterfaceSFP MAC Address and Self-learning 8K MAC addressDimensions Diagnostic LEDPower Requirement Ambient TemperatureManagement Software Specifications OBJECT-TYPE PRIVATE-GS1224L-MIB Definitions = Begin ImportsFrom RFC1213-MIB From RFC1155-SMI