D-Link DES-1252 user manual

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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 greater the probability the port will be chosen to forward packets. The default value is 19.

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Contents DES-1252 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 ModeCombo ports Sdram for CPUFlash Memory Port Functions1000Mbps Copper Chassis DimensionsReset button on TemperatureHumidity 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 1~48 Reset buttonLED Indicator Front PanelAC Power Connector Rear Panel10/100/1000 BASE-T Twisted Pair Ports Port 51~52 Understanding LED Indicators Power and System LEDsPower LEDs Ports 1 ~ 48 Status LEDs Link/Act Link/Act for UTP ports Ports 51~52 10/100/1000 Base-T LEDs Link/Act10/100Mbps shown in Amber Light Page 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 802.1Q Vlan VID Assignments Configuration TrunkingConfiguration Igmp Snooping Configuration Configuration Igmp SnoopingPage Page Configuration Igmp Router port Settings Configuration 802.1D Spanning TreeConfiguration Spanning Tree Page Configuration Port Mirroring Configuration Port MirroringSecurity Safeguard Engine QoS 802.1p Default PrioritySecurity Broadcast Storm Control Security 802.1X SettingSecurity 802.1X Setting Page Security Static Mac Address Security Mac Address Table Static MacMonitoring Statistics Security Mac Address Table Dynamic Forwarding TableMonitoring Statistics Monitoring Port Statistics