Endstation, Ethernet address, Fast Ethernet, Filtering | 3Com 3

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DHCP	Dynamic Host Control Protocol. A protocol that lets you centrally
	manage and automate the assignment of Internet Protocol (IP)
	addresses in an organization's network.
DNS	Domain Name System. This system maps a numerical Internet Protocol
	(IP) address to a more meaningful and easy-to-remember name. When
	you need to access another device on your network, you enter the
	name of the device, instead of its IP address.
DSCP	DiffServ Code Point (DSCP) — is the traffic prioritization bits within an
	IP header that are encoded by certain applications and/or devices to
	indicate the level of service required by the packet across a network.
endstation	A computer, printer or server that is connected to a network.
Ethernet	A LAN specification developed jointly by Xerox, Intel and Digital
	Equipment Corporation. Ethernet networks use CSMA/CD to transmit
	packets at a rate of 10 Mbps over a variety of cables.
Ethernet address	See MAC address.
Fast Ethernet	An Ethernet system that is designed to operate at 100Mbps.
forwarding	The process of sending a packet toward its destination using a
	networking device.
Forwarding Database	See Switch Database.
filtering	The process of screening a packet for certain characteristics, such as
	source address, destination address, or protocol. Filtering is used to
	determine whether traffic is to be forwarded, and can also prevent
	unauthorized access to a network or network devices.
flow control	A mechanism that prevents packet loss during periods of congestion on
	the network. Packet loss is caused when devices send traffic to an
	already overloaded port on a Switch. Flow control prevents packet loss
	by inhibiting devices from generating more traffic until the period of
	congestion ends.
FTP	File Transfer Protocol. A protocol based on TCP/IP for reliable file
	transfer.
full duplex	A system that allows packets to be transmitted and received at the
	same time and, in effect, doubles the potential throughput of a link.

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3Com 3 manual Endstation, Ethernet address, Fast Ethernet, Forwarding, Filtering, Full duplex

Contents

SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Using Multicast Filtering Status Monitoring and Statistics IP Addressing About this Guide List conventions that are used throughout this guide Conventions Documentation RelatedComments Pddtechpubscomments@3com.com Registration Product Switch Features Page Switch Features What isManagement Software? Switch Features Overview For more information about multicast filtering, see Using Ports operating at 1000 Mbps only support full duplex modeDuplex Flow Control Resilience Features For more information about STP and RSTP, see Using Quality of Service For more information about Quality of Service, see UsingEvent 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 Relevant multicast group Using Multicast Filtering Using Multicast Filtering Query mode Snooping ModeQuery Mode That support IP Igmp v2 protocolIgmp multicast filtering works as follows Enabling Igmp Multicast Learning Igmp Multicast Filtering Using Multicast Filtering Spanning Tree Protocol STPNetwork 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 1 Redundancy for Backbone Link Configuration 2 Redundancy through Meshed BackboneConfiguration 3 Redundancy for Cabling Error STP configurations Using STP on a Default BehaviorNetwork with Multiple VLANs Configuration that separates VLANs Using Resilience Features How Switch What is the SwitchDatabase? Database Entries Databases entries can have three states Switch Database Entry States Prioritization? What is TrafficAvailable Converged network applications Used by organizations with a 802.1D Priority Levels How Traffic Prioritization Works Traffic Prioritization Your Switch Configuring traffic prioritization for QoS on a Switch How traffic is processed to provide Quality of Service Using Traffic Prioritization What is RMON? Network efficiency and reduce the load on your networkThat allows you to monitor the traffic of LANs or VLANs Alarms EventsIt improves your efficiency Rmon Switch 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 provide extra security VLANs ease the movement of devices on networks VLANs help to control traffic Creating an Ieee 802.1Q Tagged Link Membership Two Vlans connected via a router Using Untagged ConfigurationConfigure the VLANs Examples Configure the VLANs on Switch Add endstation ports on Switch 1 to the VLANsAdd ports to the VLANs Add endstation ports on Switch 2 to the VLANs Add port 12 on Switch 1 to the VLANsAdd port 11 on Switch 2 to the VLANs Check the Vlan membership for both switches Configuration Obtains IP How Your SwitchInformation How Automatic IP How Automatic IP Configuration Works Automatic IP configuration feature That a Switch may change its IP address whilst in useConsiderations IP Addressing Configuration RulesGlossary IndexPage Configuration Rules for Gigabit Ethernet Configuration Rules Fast Ethernet configuration rules Configuration Rules for Fast Ethernet Appendix a Configuration Rules This chapter contains the following sections Network Simple Network Segments are connected to the Switch which is positionedFamily and 4900 family can be used in your network Example Dual Speed Hub Switch Improving Advanced NetworkResilience of Your Network Enhancing PerformanceTherefore the overall network performance Simple Overview IP Addresses IP Address Obtaining a Registered IP Address Dotted Decimal Notation Decimal value of an octet whose bits are all 1s isNetwork Portion Subnet mask Extending the Network Prefix Subnet Mask Numbering Or leave the field blank Glossary Glossary Ethernet EndstationEthernet address Fast Ethernet Half duplex GatewayHub Ieee 802.1D Line speed See baud Glossary Rstp See Rapid Spanning Tree Protocol STP See Spanning Tree Protocol STP Page Glossary Numbers Index Igmp multicast filtering 30 Internet Addresses 85 InterNIC Sub-networks. See subnets Switch Database