Gateway, Half duplex, Hub, Ieee 802.1D, Ieee 802.1p | 3Com 3

94 GLOSSARY

gateway	See router.
GBIC	Gigabit Interface Converter.
Gigabit Ethernet	IEEE standard 802.3z for 1000 Mbps Ethernet; it is compatible with
	existing 10/100 Mbps Ethernet standards.
half duplex	A system that allows packets to transmitted and received, but not at
	the same time. Contrast with full duplex.
hub	A device that regenerates LAN traffic so that the transmission distance
	of that signal can be extended. Hubs are similar to repeaters, in that
	they connect LANs of the same type; however they connect more LANs
	than a repeater and are generally more sophisticated.
HTTP	Hypertext Transfer Protocol. This is a set of rules for exchanging files
	(text, graphic images, sound, video, and other multimedia files) on the
	World Wide Web.
IEEE	Institute of Electrical and Electronics Engineers. This American
	organization was founded in 1963 and sets standards for computers
	and communications.
IEEE 802.1D	A standard that defines the behavior of bridges in an Ethernet network.
IEEE 802.1p	A standard that defines traffic prioritization. 802.1p is now
	incorporated into the relevant sections of the IEEE 802.1D/D17
	standard.
IEEE 802.1Q	A standard that defines VLAN tagging.
IEEE 802.3x	A standard that defines a system of flow control for ports that operate
	in full duplex.
IEEE 802.1w	A standard that defines Rapid Spanning Tree Protocol (RSTP) behavior.
IETF	Internet Engineering Task Force. An organization responsible for
	providing engineering solutions for TCP/IP networks. In the network
	management area, this group is responsible for the development of the
	SNMP protocol.
IGMP snooping	A mechanism performed by an intermediate device, such as a Layer 2
	Switch, that optimizes the flow of multicast traffic. The device listens
	for IGMP messages and build mapping tables and associated
	forwarding filters, in addition to reducing the IGMP protocol traffic.

Image 94

3Com 3 manual Gateway, Half duplex, Hub, Ieee 802.1D, Ieee 802.1p, Ieee 802.1Q, Ieee 802.1w, Igmp snooping

Contents

SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Using Multicast Filtering Status Monitoring and Statistics IP Addressing About this Guide Conventions List conventions that are used throughout this guide Comments RelatedDocumentation Pddtechpubscomments@3com.com Product Registration Switch Features Page Management What isSwitch Features Software? Switch Features Overview Duplex Ports operating at 1000 Mbps only support full duplex modeFor more information about multicast filtering, see Using Flow Control For more information about STP and RSTP, see Using Resilience Features For more information about Quality of Service, see Using Quality of ServiceEvent Notification For more information about VLANs, see Setting Up Virtual Port Features Ports operating at 1000 Mbps support full duplex mode only Port Features Switch units connected using an aggregated link Aggregated Links Traffic Distribution and Link Failure on Aggregated Links 2 Gbps aggregated link between two Switch units Optimizing Bandwidth Using Multicast Filtering Relevant multicast group Using Multicast Filtering Snooping Mode Query modeQuery Mode Igmp multicast filtering works as follows Igmp v2 protocolThat support IP Enabling Igmp Multicast Learning Igmp Multicast Filtering Using Multicast Filtering Protocol STP Spanning TreeNetwork Ieee 802.1w standard What is STP? Traffic flowing through Bridge B Port Speed Link Type Path Cost 802.1D-1998 802.1w Using Resilience Features Port costs in a network Configuration 2 Redundancy through Meshed Backbone Configuration 1 Redundancy for Backbone LinkConfiguration 3 Redundancy for Cabling Error STP configurations Network with Default BehaviorUsing STP on a Multiple VLANs Configuration that separates VLANs Using Resilience Features Database? What is the SwitchHow Switch Database Entries Switch Database Entry States Databases entries can have three states Available What is TrafficPrioritization? Converged network applications Used by organizations with a 802.1D Priority Levels How Traffic Prioritization Works Your Switch Traffic Prioritization How traffic is processed to provide Quality of Service Configuring traffic prioritization for QoS on a Switch Using Traffic Prioritization Network efficiency and reduce the load on your network What is RMON?That allows you to monitor the traffic of LANs or VLANs Events AlarmsIt improves your efficiency Switch Rmon Low Threshold Statistic High Threshold Recovery Period Low Threshold Statistic High Threshold Recovery Status Monitoring and Statistics Hardware Status Monitoring Example device summary web Setting UP Virtual Lans VLANs ease the movement of devices on networks VLANs provide extra security VLANs help to control traffic Membership Creating an Ieee 802.1Q Tagged Link Two Vlans connected via a router Configure the VLANs ConfigurationUsing Untagged Examples Add endstation ports on Switch 1 to the VLANs Configure the VLANs on SwitchAdd ports to the VLANs Add port 11 on Switch 2 to the VLANs Add port 12 on Switch 1 to the VLANsAdd endstation ports on Switch 2 to the VLANs Check the Vlan membership for both switches Configuration Information How Your SwitchObtains IP How Automatic IP How Automatic IP Configuration Works That a Switch may change its IP address whilst in use Automatic IP configuration featureConsiderations Glossary Configuration RulesIP Addressing IndexPage Configuration Rules Configuration Rules for Gigabit Ethernet Fast Ethernet configuration rules Configuration Rules for Fast Ethernet Appendix a Configuration Rules Network This chapter contains the following sections Family and 4900 family can be used in your network Segments are connected to the Switch which is positionedSimple Network Example Dual Speed Hub Switch Resilience of Your Advanced NetworkImproving Network Performance EnhancingTherefore the overall network performance IP Addresses Simple Overview Obtaining a Registered IP Address IP Address Decimal value of an octet whose bits are all 1s is Dotted Decimal NotationNetwork Portion Subnet mask Subnet Mask Numbering Extending the Network Prefix Or leave the field blank Glossary Glossary Ethernet address EndstationEthernet Fast Ethernet Hub GatewayHalf duplex Ieee 802.1D Line speed See baud Glossary Rstp See Rapid Spanning Tree Protocol STP See Spanning Tree Protocol STP Page Glossary Index Numbers Igmp multicast filtering 30 Internet Addresses 85 InterNIC Sub-networks. See subnets Switch Database