Cisco Systems DGS-1224T manual

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for controlling the frequency of IGMP traffic on a subnet. Default is 10 seconds.

Robustness Variable (1-255 sec): The Robustness Variable allows adjustment for the expected packet loss on a subnet. If a subnet is expected to be lossy, the Robustness Variable may be increased. The Robustness Variable can not be set zero, and SHOULD NOT be one. Default is 2 seconds.

Last Member Query Interval (1-25 sec): The Last Member Query Interval is the Max Response Time inserted into Group-Specific Queries sent in response to Leave Group messages, and is also the amount of time between Group-Specific Query messages. This value may be adjusted to modify the "leave latency" of the network. A reduced value results in reduced time to detect the loss of the last member of a group. Default is 1 second.

Host Timeout (130-1225 sec): This is the interval after which a learnt host port entry will be purged. For each host port learnt, a 'PortPurgeTimer' runs for 'HostPortPurgeInterval'. This timer will be restarted whenever a report message from host is received over that port. If no report messages are received for 'HostPortPurgeInterval' time, the learnt host entry will be purged from the multicast group. Default is 260 seconds.

Router Timeout (60-600 sec): This is the interval after which a learnt router port entry will be purged. For each router port learnt, a 'RouterPortPurgeTimer' runs for 'RouterPortPurgeInterval'. This timer will be restarted whenever a router control message is received over that port. If no router control messages are received for 'RouterPortPurgeInterval' time, the learnt router port entry will be purged. Default is 125 seconds.

Leave Timer (0-25 sec): This is the interval after which a Leave message is forwarded on a port. When a leave message from a host for

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Contents Building Networks for People LinkDGS-1224TTable of Contents Page Page Terms/Usage PurposeIntroduction Gigabit Ethernet TechnologyFast Ethernet Technology Ieee 802.1Q Vlan Switching TechnologyIEEE802.1Q Vlan FeaturesTechnical Specifications Ieee 802.3 compliance Flash MemoryPower consumption Temperature Storage TemperatureEmission EMI and Safety Certifications Physical & EnvironmentUnpacking InstallationAttach the adhesive rubber pads to the bottom Rack MountingAttach the mounting brackets to the Switch Connecting Network CableAC Power Front Panel LED IndicatorRear Panel Rear panel of the SwitchUnderstanding LED Indicators Power and System LEDsBlinking Supported web browsers Installing the SmartConsole UtilityMenu Toolbar SmartConsole Utility FeaturesPage Definitions of the Discovery List features Discovery ListMonitor List View trap Definitions of the Monitor List functions and termsTrap information Device SettingThis space has been intentionally reserved for notes Firmware Upgrade Web-based Utility LoginLog in screen Tool Menu Tool MenuTool Menu Configure Backup and Restore Tool Menu System Reboot Setup MenuSystem Trap Setting System System SettingSystem Trap Setting System Port Setting System Port SettingSystem Snmp Setting System Snmp Setting System Password Access Control System Password Access ControlConfiguration 802.1Q Vlan Configuration Jumbo FrameConfiguration 802.1Q Vlan Default Setting Configuration 802.1Q Vlan Example VIDs Configuration Igmp Snooping Configuration TrunkingConfiguration Igmp Snooping Configuration Page Configuration Igmp Router port Settings Configuration Igmp Multicast Entry Table Configuration Spanning Tree Configuration 802.1D Spanning TreePage Configuration Port Mirroring Configuration Port MirroringSecurity Safeguard Engine QoS 802.1p Default PrioritySecurity Broadcast Storm Control Security Safeguard EngineSecurity Broadcast Storm Control Security 802.1X SettingQoS 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