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KTI Networks KGS-2404 manual 9 Tag Format

Models: KGS-2404

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Fig.3-9 Tag Format

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.

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KTI Networks KGS-2404 manual 9 Tag Format

Contents

DOC.080711 KGS-2404Web Smart 24-Port Gigabit Ethernet Switch User’s Manual Page Release Web Smart 24-Port Gigabit Ethernet Switch Users ManualTable of Contents 4-4. Maintenance 06/28/2007 Revision HistoryElectronic Emission Notices 1.02Overview of this user’s manual About this user’s manual1. Introduction 1-1. Overview of 24-Port GbE Web Smart SwitchKey Features in the Device Management 1-2. Checklist1-3. Features HardwareSupports on-line plug/unplug SFP modules Supports user management and limits one user to loginSupports 802.1Q VLAN Supports to send the trap event while monitored events happened1-4-1. User Interfaces on the Front Panel Button, LEDs and Plugs 1-4. View of 24-Port GbE Web Smart Switch10/100/1000Ethernet TP Port 1 to 24 LED LED Indicators1-4-2. User Interfaces on the Rear Panel System LED1-5. View of the Optional Modules Connecting the SFP Module to the Chassis 2. Installation2-1. Starting 24-Port GbE Web Smart Switch Up 2-1-1. Hardware and Cable InstallationFirmware Loading TP Port and Cable InstallationPower On 2-1-2. Cabling Requirements2-1-2-2. Cabling Requirements for 1000SX/LX SFP Module 2-1-2-1. Cabling Requirements for TP Ports100Base-TX TP 2-1-2-3. Switch Cascading in TopologyTakes the Delay Time into Account 1000Base-X TP, FiberCase2a Port-based VLAN See Fig.2-3 Case 2b Port-based VLAN See Fig.2-4 Page 2-1-3-1. Management through Ethernet Port Managing 24-Port GbE Web Smart Switch through Ethernet Port2-1-4. IP Address Assignment Class A 10000000.00000001.00000010.1 NetworkSubnet 25 bits All 0s = 128.1.2.128 All 1s=Prefix LengthNo. of IP matchedNo. of Addressable IP Default gateway 2-2. Typical Applications Fig. 2-12 Office Network Connection Fig. 2-11 Peer-to-peer Network Connection3-1. What’s the Ethernet 3. Basic Concept and ManagementIEEE 802.3 PLS IEEE MAU Coaxial/STP/UTP Data Link LayerIEEE 802.2 LLC IEEE802.3 CSMA/CD MAC Physical Layer0xAAAA 3-2. Media Access Control MAC 1st byte 0x8137 IPX datagram 0x86DD IPv6 For example 0x0800 IP datagram 0x0806 ARP 0x0835 RARPThe MAC sub-layer has two primary jobs to do Fig. 3-4 Gigabit Ethernet Frame 64 bytesTable 3-4 Ethernet parameters for half duplex mode Parameter value/LAN Max. collision domain DTE to DTEBurstLimit 3-3. Flow Control For a received frame, the MAC will check Frame ReceptionBits Bit Bits 3-4. How does a switch work? Extended Distance Limitations MAC address table How does a switch operate?Transmission schedule FCFS First Come First Service Strictly Priority All High before LowWeighted Round Robin Mac address aging3-5. Virtual LAN Page Fig.3-9 Tag Format VLAN Identifier VLAN-tagged framePriority-tagged frame Untagged frame An Ethernet frame carries no VLAN tag informationShared VLAN Learning SVL Ingress RuleEgress Rule Independent VLAN Learning IVLName NamePort Members Network Address3-6. Link Aggregation Terminology Link Aggregation 4. Operation of Web-based Management IP Address Subnet Mask Default Gateway Password4-1. Web Management Home Overview The Information of Page Layout 4-2. Configuration Parameter description 4-2-1. System ConfigurationFunction name Function descriptionShow the IP address of the DHCP server. Default Lease Time Left Show the active IP address of this switch. Active Subnet MaskShow the active subnet mask of this switch. Active Gateway Show the active gateway of this switch. DHCP ServerDefault admin Inactivity Timeoutsecs Default 255.255.255.0 Fallback GatewayDefault 192.168.1.254 Management VLAN Show the management VLAN number. PasswordSpeed 4-2-2. Port ConfigurationMedia type NWayParameter description 4-2-3. VLAN Mode ConfigurationFunction name Function descriptionTag-based Parameter description 4-2-4. VLAN Group ConfigurationFunction name Function descriptionFig. 4-8 Add or Remove VLAN Member Fig. 4-9 Port-Based VLAN ConfigurationAdd Group Delete GroupPage Parameter description 4-2-5. AggregationFunction name Function descriptionParameter description 4-2-6. LACPFunction name Function descriptionParameter description 4-2-7. RSTPFunction name Function descriptionParameter description continue Fig. 4-12 RSTP ConfigurationFunction name Function descriptionSupplicant 4-2-8Page Page Port Status AuthenticationPort Mode Port ControlFunction description Mode Enable or disable 802.1X function RADIUS IPForce Reinitialize for all ports in at once Parameter description Function name802.1x Parameters Function descriptionFunction description 4-2-9 IGMP SnoopingFig. 4-19 IGMP Configuration Function nameParameter description 4-2-10. Mirror ConfigurationFunction name Function descriptionFig. 4-21 QoS Configuration 4-2-11. QoSQuality of Service ConfigurationFunction description Function nameFunction description Function nameParameter description DSCP SettingFunction name Function descriptionParameter description 4-2-12 FilterFunction name Function descriptionDHCP Server Allowed Fig. 4-24 Filter ConfigurationDefault enable Parameter description 4-2-13 Rate LimitFunction name Function descriptionParameter description 4-2-14 Storm ControlFunction name Function descriptionFlooded unicast Rate Multicast RateFunction description 4-2-15 SNMPParameters description Function nameFig. 4-27 SNMP Configuration Default community name for Get publicDefault community name for Set private Default community name for Trap publicFunction description 4-3. Monitoring4-3-1. Statistics Overview Function nameFig. 4-28 Statistics Overview for all ports Tx Errors Number of bad packets transmitted Rx ErrorsNumber of bad packets received Parameter description 4-3-2. Detailed StatisticsFunction name Function descriptionTx 64 Bytes Tx Error PacketsShow the counting number of the received error packets. Rx 64 Bytes Number of 1024-maxlength-byte frames in good and bad packets receivedNumber of short frames 64 bytes with invalid CRC. Rx Jabber Parameter description 4-3-3. LACP StatusFunction name Function descriptionParameter description 4-3-4. RSTP StatusFunction name Function descriptionFig. 4-31 RSTP Status Parameter description 4-3-5. IGMP StatusFunction name Function descriptionParameter description 4-3-6. Ping StatusFunction name Function descriptionShow the result of the ping status. Received replies Show the received replies number of times. Request timeoutsShow the timeout of request. Average Response times In ms Target IP address Show the active target IP address. StatusConfiguration File Transfer Logout 4-4. MaintenanceThere are five functions contained in the maintenance function Maintenance Warm Restart Factory Default Software UpgradeFunction description 4-4-1. Warm RestartFunction name Function description 4-4-2. Factory DefaultFunction name Function name 4-4-3. Software UpgradeSoftware Upgrade Fig. 4-36 Software UpgradeFunction name 4-4-4. Configuration File TransferFunction description Parameter description 4-4-5. LogoutFunction name Function description5-2. Q&A 5. Maintenance5-1. Resolving No Link Condition Features Appendix A Technical Specificationsƒ Network Interface Hardware SpecificationsConfiguration ConnectorDimensions ƒ Diagnostic LEDƒ Power Requirement Ambient TemperatureVLAN Function Management Software SpecificationsSystem Configuration Quality of Service QoSAppendix B MIB Specifications