D-Link DES-1228 user manual

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After Enabling STP, setting the STP Global Setting includes the following options:

Bridge Priority: This value between 0 and 65535 specifies the

priority for forwarding packets: the lower the value, the higher the priority. The default is 32768.

Bridge Max Age: This value may be set to ensure that old information does not endlessly circulate through redundant paths in the network, preventing the effective propagation of the new information. Set by the Root Bridge, this value will aid in determining that the Switch has spanning tree configuration values consistent with other devices on the bridged LAN. If the value ages out and a BPDU has still not been received from the Root Bridge, the Switch will start sending its own BPDU to all other switches for permission to become the Root Bridge. If it turns out that the Switch has the lowest Bridge Identifier, it will become the Root Bridge. A time interval may be chosen between 6 and 40 seconds. The default value is 20.

Bridge Hello Time: The user may set the time interval between transmissions of configuration messages by the root device, thus stating that the Switch is still functioning. The default is 2 seconds. (Max Age has to have a value bigger than Hello Time)

Bridge Forward Delay: This sets the maximum amount of time that the root device will wait before changing states. The default is 15 seconds.

Root Bridge: Displays the MAC address of the Root Bridge.

Root port: Displays the root port.

Root Path Cost: Shows the root path cost.

Path Cost: This defines a metric that indicates the relative cost of forwarding packets to specified port list. The lower the number, the

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Contents DES-1228 Table of Contents Page Iii Page Terms/Usage PurposeIntroduction Gigabit Ethernet TechnologyFast Ethernet Technology Switching TechnologyIEEE802.1X Port-based Access Control FeaturesMax. Forwarding Rate Technical SpecificationsKey Components / Performance Switching Capacity Forwarding ModeFront panel Sdram for CPUFlash Memory Port FunctionsPorts in the front Chassis DimensionsReset button on 1000Mbps CopperAC input Temperature Storage TemperaturePower consumption Emission EMI and Safety CertificationsUnpacking InstallationAttach the adhesive rubber pads to the bottom Rack MountingAttach the mounting brackets to the Switch Connecting Network CableAC Power 10/100 BASE-TX Twisted Pair Ports Port 1~24 Reset buttonLED Indicator Front PanelAC Power Connector Rear Panel10/100/1000 BASE-T Twisted Pair Ports Port 27~28 Understanding LED Indicators Power and System LEDsPower LEDs 100Mbps Ports 1 ~ 24 Status LEDs Link/ActPorts 27~28 10/100/1000 Base-T LEDs Link/Act 1000MbpsWhen the 1000Mbps LED light is on, the respective port Supported web browsers Installing the SmartConsole UtilityMenu Toolbar SmartConsole Utility FeaturesOption includes Refresh Time and Group Interval functions Discovery List Definitions of the Discovery List featuresDefinitions of the Monitor List functions and terms Monitor ListView trap This space has been intentionally reserved for notes Device SettingFirmware Upgrade Web-based Management LoginLog in screen Tool Menu Tool MenuTool Menu Firmware Backup and Upload Setup MenuC P System System SettingSystem System Setting System Trap SettingSystem Trap Setting System Port SettingSystem Port Setting System Snmp Setting System Snmp Setting Configuration 802.1Q Vlan System Password Access ControlConfiguration 802.1Q Vlan Default Setting Configuration 802.1Q Vlan Add VID Configuration Igmp Snooping Configuration TrunkingConfiguration Igmp Snooping Configuration Page Page Configuration Igmp Router port Settings Configuration Spanning Tree Configuration 802.1D Spanning TreePage Configuration Port Mirroring Configuration Port MirroringQoS 802.1p Default Priority QoS 802.1p Default PrioritySecurity Safeguard Engine Security 802.1X SettingSecurity Broadcast Storm Control Security 802.1X Setting Page Security Static Mac Address Security Mac Address Table Static MacSecurity Dynamic Forwarding Table Security Mac Address Table Dynamic Forwarding TableMonitoring Statistics Monitoring StatisticsMonitoring Port Statistics