Quality of Service, Event Notification | 3Com 3 specification

Switch Features Explained

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This system is compatible with the relevant sections of the IEEE 802.1D/D17 standard (incorporating IEEE 802.1p).

For more information about 802.1D and traffic prioritization, see Chapter 6 “Using Traffic Prioritization”.

Quality of Service

Traffic prioritization can be taken one step further by using the Quality of Service (QoS) feature. Quality of Service (QoS) enables you to specify service levels for different traffic classifications. This enables you to prioritize particular applications or traffic types.

The Switch uses a policy-based QoS mechanism. By default, all traffic is assigned the "normal" QoS policy profile. If needed, you can create other QoS policy profiles and apply them to different traffic types so that they have different priorities across the network.

For more information about Quality of Service, see Chapter 6 “Using

Traffic Prioritization”.

RMON Remote Monitoring (RMON) is an industry standard feature for traffic monitoring and collecting network statistics. The Switch software continually collects statistics about the LAN segments connected to the Switch. If you have a management workstation with an RMON management application, the Switch can transfer these statistics to your workstation on request or when a pre-defined threshold is exceeded.

Event Notification

You can configure your Switch to send you notification when certain events occur. You can receive notification via email, SMS (Short Message Server), or pager.

For more information about RMON and Event Notification, see Chapter 7 “Status Monitoring and Statistics”.

Broadcast Storm Broadcast Storm Control is a system that monitors the level of broadcast Control traffic on that port. If the broadcast traffic level rises to a pre-defined

number of frames per second (threshold), the broadcast traffic on the port is blocked until the broadcast traffic level drops below the threshold. This system prevents the overwhelming broadcast traffic that can result from network equipment which is faulty or configured incorrectly.

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3Com 3 manual For more information about Quality of Service, see Using, Event Notification

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 Event 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 Relevant multicast group Using Multicast Filtering Using Multicast Filtering Query Mode Query modeSnooping Mode That support IP Igmp v2 protocolIgmp multicast filtering works as follows Enabling Igmp Multicast Learning Igmp 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 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 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 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 Add ports to the VLANs Configure the VLANs on SwitchAdd endstation ports on Switch 1 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 Considerations Automatic IP configuration featureThat a Switch may change its IP address whilst in use 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 Therefore the overall network performance EnhancingPerformance Simple Overview IP Addresses IP Address Obtaining a Registered IP Address Network Portion Dotted Decimal NotationDecimal value of an octet whose bits are all 1s is 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