3Com 3 manual STP See Spanning Tree Protocol STP

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98GLOSSARY

standard service levels, for example, best effort, business critical, network control, and so on.

SLIP Serial Line Internet Protocol. A protocol that allows IP to run over a serial line (console port) connection.

SMTP Simple Mail Transfer Protocol. An IETF standard protocol used for transferring mail across a network reliably and efficiently (as defined in RFC 821).

SNMP Simple Network Management Protocol. The current IETF standard protocol for managing devices on an TCP/IP network.

Spanning Tree A bridge-based system for providing fault tolerance on networks. STP Protocol (STP) works by allowing you to implement parallel paths for network traffic, and ensure that redundant paths are disabled when the main paths are

operational and enabled if the main paths fail.

stack A group of network devices that are integrated to form a single logical device.

standby port The port in a resilient link that takes over data transmission if the main port in the link fails.

STP See Spanning Tree Protocol (STP).

subnet mask A subnet mask is used to divide the device part of the IP address into two further parts. The first part identifies the subnet number. The second part identifies the device on that subnet.

switch A device that interconnects several LANs to form a single logical LAN that comprises of several LAN segments. Switches are similar to bridges, in that they connect LANs of a different type; however they connect more LANs than a bridge and are generally more sophisticated.

Switch Database A database that is stored by a switch to determine if a packet should be forwarded, and which port should forward the packet if it is to be forwarded. Also known as Forwarding Database.

TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for two of the most well-known protocols developed for the interconnection of networks. Originally a UNIX standard, TCP/IP is now supported on almost all platforms, and is the protocol of the Internet.

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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 guideComments RelatedDocumentation Pddtechpubscomments@3com.comProduct RegistrationSwitch 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 ControlFor more information about STP and RSTP, see Using Resilience FeaturesEvent Notification Quality of ServiceFor more information about Quality of Service, see Using 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 groupUsing Multicast Filtering Query Mode Query modeSnooping Mode Igmp multicast filtering works as follows Igmp v2 protocolThat support IP Enabling Igmp Multicast LearningIgmp Multicast Filtering Using Multicast Filtering Network Spanning TreeProtocol STP 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 3 Redundancy for Cabling Error Configuration 1 Redundancy for Backbone LinkConfiguration 2 Redundancy through Meshed Backbone STP configurations Network with Default BehaviorUsing STP on a Multiple VLANsConfiguration that separates VLANs Using Resilience Features Database? What is the SwitchHow Switch Database EntriesSwitch Database Entry States Databases entries can have three statesAvailable What is TrafficPrioritization? Converged network applications Used by organizations with a802.1D Priority Levels How Traffic Prioritization Works Your Switch Traffic PrioritizationHow traffic is processed to provide Quality of Service Configuring traffic prioritization for QoS on a SwitchUsing Traffic Prioritization That allows you to monitor the traffic of LANs or VLANs What is RMON?Network efficiency and reduce the load on your network It improves your efficiency AlarmsEvents Switch RmonLow 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 securityVLANs help to control traffic Membership Creating an Ieee 802.1Q Tagged LinkTwo Vlans connected via a router Configure the VLANs ConfigurationUsing Untagged ExamplesAdd ports to the VLANs Configure the VLANs on SwitchAdd endstation ports on Switch 1 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 switchesConfiguration Information How Your SwitchObtains IP How Automatic IPHow Automatic IP Configuration Works Considerations Automatic IP configuration featureThat a Switch may change its IP address whilst in use Glossary Configuration RulesIP Addressing IndexPage Configuration Rules Configuration Rules for Gigabit EthernetFast Ethernet configuration rules Configuration Rules for Fast Ethernet Appendix a Configuration Rules Network This chapter contains the following sectionsFamily and 4900 family can be used in your network Segments are connected to the Switch which is positionedSimple Network ExampleDual Speed Hub Switch Resilience of Your Advanced NetworkImproving NetworkTherefore the overall network performance EnhancingPerformance IP Addresses Simple OverviewObtaining a Registered IP Address IP AddressNetwork Portion Dotted Decimal NotationDecimal value of an octet whose bits are all 1s is Subnet mask Subnet Mask Numbering Extending the Network PrefixOr leave the field blank Glossary Glossary Ethernet address EndstationEthernet Fast EthernetHub 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 NumbersIgmp multicast filtering 30 Internet Addresses 85 InterNIC Sub-networks. See subnets Switch Database

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