Implementation Guide
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DUA1740-0BAA01 Published May 2003 Switch 3812 and Switch 3824 Implementation Guide 3C17401, 3C17400 http://www.3com.com/ Part No.
DUA1740-0BAA01 Published May 2003 Switch 3812 and Switch 3824 Implementation Guide 3C17401, 3C17400 http://www.3com.com/ Part No.
Implementation Guide
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... with only such rights as a separate document, in the hard copy documentation, or on the removable media in the United States and other countries. 3Com, the 3Com logo and SuperStack are unable to , the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for this documentation may make any kind, either...
... with only such rights as a separate document, in the hard copy documentation, or on the removable media in the United States and other countries. 3Com, the 3Com logo and SuperStack are unable to , the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for this documentation may make any kind, either...
Implementation Guide
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... Automatic IP Configuration 12 Port Security 12 Aggregated Links 12 Auto-negotiation 12 Multicast Filtering 13 Spanning Tree Protocol and Rapid Spanning Tree Protocol 13 Switch Database 14 Traffic Prioritization 14 RMON 14 Broadcast Storm Control 15 VLANs 15 Configuration Save and Restore 15 2 OPTIMIZING BANDWIDTH Port Features 17 Duplex 17...
... Automatic IP Configuration 12 Port Security 12 Aggregated Links 12 Auto-negotiation 12 Multicast Filtering 13 Spanning Tree Protocol and Rapid Spanning Tree Protocol 13 Switch Database 14 Traffic Prioritization 14 RMON 14 Broadcast Storm Control 15 VLANs 15 Configuration Save and Restore 15 2 OPTIMIZING BANDWIDTH Port Features 17 Duplex 17...
Implementation Guide
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...Example 24 3 USING MULTICAST FILTERING What is an IP Multicast? 27 Benefits of Multicast 28 Multicast Filtering 28 Multicast Filtering and Your Switch 29 IGMP Multicast Filtering 30 4 USING RESILIENCE FEATURES Resilience Feature Overview 34 Spanning Tree Protocol (STP) 34 Rapid Spanning Tree Protocol ... 39 STP Configurations 41 Using STP on a Network with Multiple VLANs 43 5 USING THE SWITCH DATABASE What is the Switch Database? 45 How Switch Database Entries Get Added 45 Switch Database Entry States 46 6 USING TRAFFIC PRIORITIZATION What is Traffic Prioritization? 48 How Traffic Prioritization...
...Example 24 3 USING MULTICAST FILTERING What is an IP Multicast? 27 Benefits of Multicast 28 Multicast Filtering 28 Multicast Filtering and Your Switch 29 IGMP Multicast Filtering 30 4 USING RESILIENCE FEATURES Resilience Feature Overview 34 Spanning Tree Protocol (STP) 34 Rapid Spanning Tree Protocol ... 39 STP Configurations 41 Using STP on a Network with Multiple VLANs 43 5 USING THE SWITCH DATABASE What is the Switch Database? 45 How Switch Database Entries Get Added 45 Switch Database Entry States 46 6 USING TRAFFIC PRIORITIZATION What is Traffic Prioritization? 48 How Traffic Prioritization...
Implementation Guide
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... Default QoS Configurations 58 7 STATUS MONITORING AND STATISTICS RMON 59 What is RMON? 59 The RMON Groups 59 Benefits of RMON 61 RMON and the Switch 61 Alarm Events 62 8 SETTING UP VIRTUAL LANS What are VLANs? 63 Benefits of VLANs 64 VLANs and Your...: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802.1Q Tagged Connections 68 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 72 How Automatic IP Configuration Works 72 Automatic Process 72 Important Considerations 72 Server Support 73 Event Log Entries and Traps 73
... Default QoS Configurations 58 7 STATUS MONITORING AND STATISTICS RMON 59 What is RMON? 59 The RMON Groups 59 Benefits of RMON 61 RMON and the Switch 61 Alarm Events 62 8 SETTING UP VIRTUAL LANS What are VLANs? 63 Benefits of VLANs 64 VLANs and Your...: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802.1Q Tagged Connections 68 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 72 How Automatic IP Configuration Works 72 Automatic Process 72 Important Considerations 72 Server Support 73 Event Log Entries and Traps 73
Implementation Guide
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A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 75 Configuration Rules for Fast Ethernet 76 Configuration Rules with Full Duplex 77 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 80 Desktop Switch Example 80 Advanced Network Configuration Examples 81 Improving the Resilience of Your Network 81 Enhancing the Performance of Your Network 82 C IP ADDRESSING IP Addresses 83 Simple Overview 83 Advanced Overview 84 Subnets and Subnet Masks 86 Default Gateways 88 GLOSSARY INDEX
A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 75 Configuration Rules for Fast Ethernet 76 Configuration Rules with Full Duplex 77 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 80 Desktop Switch Example 80 Advanced Network Configuration Examples 81 Improving the Resilience of Your Network 81 Enhancing the Performance of Your Network 82 C IP ADDRESSING IP Addresses 83 Simple Overview 83 Advanced Overview 84 Subnets and Subnet Masks 86 Default Gateways 88 GLOSSARY INDEX
Implementation Guide
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... network (LAN) operations and familiarity with your Switch supports. The term Switch 3812 and Switch 3824 is responsible for details of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit). It outlines how to use these features to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). If release notes...
... network (LAN) operations and familiarity with your Switch supports. The term Switch 3812 and Switch 3824 is responsible for details of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit). It outlines how to use these features to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). If release notes...
Implementation Guide
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The word "command" means that you must enter the command exactly as it is defined in bold. If you must press two or more keys simultaneously, the key names are used to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents information as shown and then press Return or Enter. Click OK. Syntax The word "syntax" means that you must evaluate the syntax provided and then supply the appropriate values for . Example: To change your password, use the following command: The words "enter" and "type" Keyboard key ...
The word "command" means that you must enter the command exactly as it is defined in bold. If you must press two or more keys simultaneously, the key names are used to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents information as shown and then press Return or Enter. Click OK. Syntax The word "syntax" means that you must evaluate the syntax provided and then supply the appropriate values for . Example: To change your password, use the following command: The words "enter" and "type" Keyboard key ...
Implementation Guide
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...you . Related Documentation 9 Related Documentation Documentation Comments In addition to this document to 3Com at: pddtechpubs_comments@3com.com Please include the following : ■ Switch 3812 and Switch 3824 Getting Started Guide This guide contains: ■ all the information you may find ...useful, such as: ■ Documentation accompanying 3Com Network Supervisor. It is supplied on how to access the management software to begin managing the Switch. ■ Switch 3812 and Switch 3824 Management Interface Reference Guide This guide provides detailed information ...
...you . Related Documentation 9 Related Documentation Documentation Comments In addition to this document to 3Com at: pddtechpubs_comments@3com.com Please include the following : ■ Switch 3812 and Switch 3824 Getting Started Guide This guide contains: ■ all the information you may find ...useful, such as: ■ Documentation accompanying 3Com Network Supervisor. It is supplied on how to access the management software to begin managing the Switch. ■ Switch 3812 and Switch 3824 Management Interface Reference Guide This guide provides detailed information ...
Implementation Guide
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... information on the title page) ■ Page number (if appropriate) Example: ■ Switch 3812 and Switch 3824 Implementation Guide ■ Part number: DUA1740-0BAA01 ■ Page 25 Please note that we can now register your Switch on the 3Com Web site: http://www.3com.com/register/ You will need your product part number (3Cxxxxx), product serial...
... information on the title page) ■ Page number (if appropriate) Example: ■ Switch 3812 and Switch 3824 Implementation Guide ■ Part number: DUA1740-0BAA01 ■ Page 25 Please note that we can now register your Switch on the 3Com Web site: http://www.3com.com/register/ You will need your product part number (3Cxxxxx), product serial...
Implementation Guide
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...make full use of the features offered by your network. This is Management Software? 1 SWITCH FEATURES OVERVIEW What is known as managing the Switch. Managing the Switch can operate in this guide. their applications are several different methods of these features - ...software provides you to change the default state of some of your Switch, please refer to manage the Switch. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. There are explained in more detail ...
...make full use of the features offered by your network. This is Management Software? 1 SWITCH FEATURES OVERVIEW What is known as managing the Switch. Managing the Switch can operate in this guide. their applications are several different methods of these features - ...software provides you to change the default state of some of your Switch, please refer to manage the Switch. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. There are explained in more detail ...
Implementation Guide
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...devices to communicate using a Configuration DHCP server. if one link is 1000. Any packets containing a source address not learnt on the Switch is broken, the other links share the traffic for an individual port or a range of permanent addresses on the port will be ...dropped. Auto-negotiation Auto-negotiation allows ports to eight links in parallel. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can provide redundancy - When auto-negotiation is forwarded through the port without any restrictions. ■ Secure All currently learnt...
...devices to communicate using a Configuration DHCP server. if one link is 1000. Any packets containing a source address not learnt on the Switch is broken, the other links share the traffic for an individual port or a range of permanent addresses on the port will be ...dropped. Auto-negotiation Auto-negotiation allows ports to eight links in parallel. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can provide redundancy - When auto-negotiation is forwarded through the port without any restrictions. ■ Secure All currently learnt...
Implementation Guide
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...Protocol) snooping to detect the endstations in each path. ■ Enable the most efficient path. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that are bridge-based systems that minimizes packet loss during periods of a predefined multicast ...broadcast storms. STP allows you to implement alternative paths for network traffic in half duplex mode, and is a mechanism that make your Switch. For more resilient to : ■ Discover the efficiency of path failure and uses a loop-detection process to link failure and ...
...Protocol) snooping to detect the endstations in each path. ■ Enable the most efficient path. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that are bridge-based systems that minimizes packet loss during periods of a predefined multicast ...broadcast storms. STP allows you to implement alternative paths for network traffic in half duplex mode, and is a mechanism that make your Switch. For more resilient to : ■ Discover the efficiency of path failure and uses a loop-detection process to link failure and ...
Implementation Guide
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... statistics about RMON and Event Notification, see Chapter 4 "Using Resilience Features". RSTP is an enhanced version of the STP feature and is enabled by the Switch to determine if a packet should be forwarded. For more information about STP and RSTP, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation...
... statistics about RMON and Event Notification, see Chapter 4 "Using Resilience Features". RSTP is an enhanced version of the STP feature and is enabled by the Switch to determine if a packet should be forwarded. For more information about STP and RSTP, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation...
Implementation Guide
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... per second (threshold), the broadcast traffic on the port is reset to its factory default settings before you can reset the Switch using the Switch's Command Line Interface is stored in an readable ASCII text file. This system prevents the overwhelming broadcast traffic that can result from...and restored. With VLANs, you restore a configuration onto it. If the broadcast traffic level rises to save and restore the Switch configuration. Important Considerations ■ 3Com recommends the Switch unit is blocked until the broadcast traffic level drops below the threshold.
... per second (threshold), the broadcast traffic on the port is reset to its factory default settings before you can reset the Switch using the Switch's Command Line Interface is stored in an readable ASCII text file. This system prevents the overwhelming broadcast traffic that can result from...and restored. With VLANs, you restore a configuration onto it. If the broadcast traffic level rises to save and restore the Switch configuration. Important Considerations ■ 3Com recommends the Switch unit is blocked until the broadcast traffic level drops below the threshold.
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... Configuration Restore will be unsuccessful if the physical configuration of the device is , LACP enabled on the CD-ROM that accompanies your Switch. For detailed descriptions of the configuration. For further information about LACP, see Chapter 2 "Optimizing Bandwidth". ■ When restoring a... aggregations - that is different. ■ The configuration of the Switch must only be restored or saved by a single user at a time. ■ When using the Configuration Save and Restore feature, 3Com recommends that aggregated links are configured as either: ■ Manual aggregations...
... Configuration Restore will be unsuccessful if the physical configuration of the device is , LACP enabled on the CD-ROM that accompanies your Switch. For detailed descriptions of the configuration. For further information about LACP, see Chapter 2 "Optimizing Bandwidth". ■ When restoring a... aggregations - that is different. ■ The configuration of the Switch must only be restored or saved by a single user at a time. ■ When using the Configuration Save and Restore feature, 3Com recommends that aggregated links are configured as either: ■ Manual aggregations...
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... Line Interface (CLI) commands that you do not need to be transmitted and received simultaneously and, in HTML format on your Switch. Port Features The default state for all the features detailed below provides the best configuration for example, if you are many ways...negotiation, this is done automatically. To communicate effectively, both devices at either end of a link. In normal operation, you require to manage the Switch please refer to your network and end users: ■ Increased bandwidth ■ Quicker connections ■ Faster transfer of data ■ Minimized data...
... Line Interface (CLI) commands that you do not need to be transmitted and received simultaneously and, in HTML format on your Switch. Port Features The default state for all the features detailed below provides the best configuration for example, if you are many ways...negotiation, this is done automatically. To communicate effectively, both devices at either end of a link. In normal operation, you require to manage the Switch please refer to your network and end users: ■ Increased bandwidth ■ Quicker connections ■ Faster transfer of data ■ Minimized data...
Implementation Guide
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... cables, that a port "advertises" on the type of port. Packet loss is disabled, the auto-MDIX feature does not operate on the Switch. Auto-negotiation Auto-negotiation allows ports to an already overloaded port on the ports. Ports operating at 10 Mbps and 100 Mbps) and flow ... using the IEEE Std 802.3-2002 (incorporating 802.3x) for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port basis, dependant on a per port. When auto-negotiation is , cross-over or straight-through need to auto-negotiate. Flow control...
... cables, that a port "advertises" on the type of port. Packet loss is disabled, the auto-MDIX feature does not operate on the Switch. Auto-negotiation Auto-negotiation allows ports to an already overloaded port on the ports. Ports operating at 10 Mbps and 100 Mbps) and flow ... using the IEEE Std 802.3-2002 (incorporating 802.3x) for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port basis, dependant on a per port. When auto-negotiation is , cross-over or straight-through need to auto-negotiate. Flow control...
Implementation Guide
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...aggregated link fails, the traffic using that have full duplex connections operating at the same speed. How 802.3ad Link Aggregation Operates Your Switch supports IEEE Std 802.3-2002 (incorporating 802.3ad) aggregated links which use the Link Aggregation Control Protocol (LACP). In this example, ...if link 1 fails, the data flow between two devices (switch-to-switch or switch-to-server) that link is the physical links, form an aggregated link. Figure 2 shows the simplest case: two member links, that...
...aggregated link fails, the traffic using that have full duplex connections operating at the same speed. How 802.3ad Link Aggregation Operates Your Switch supports IEEE Std 802.3-2002 (incorporating 802.3ad) aggregated links which use the Link Aggregation Control Protocol (LACP). In this example, ...if link 1 fails, the data flow between two devices (switch-to-switch or switch-to-server) that link is the physical links, form an aggregated link. Figure 2 shows the simplest case: two member links, that...
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... be enabled or disabled on a per port basis. non-802.3ad devices can implement 802.3ad aggregated links in Figure 3, if a port on Switch C to and from an aggregated link via network management. 20 CHAPTER 2: OPTIMIZING BANDWIDTH failed - As a result, aggregated link configurations are : ... fault-tolerant. However, if a port has LACP enabled, and if a more appropriate or correct automatic membership is physically connected to Switch B, but you will override the manual configuration. Implementing 802.3ad Aggregated Links LACP can be able to automatically detect and form an...
... be enabled or disabled on a per port basis. non-802.3ad devices can implement 802.3ad aggregated links in Figure 3, if a port on Switch C to and from an aggregated link via network management. 20 CHAPTER 2: OPTIMIZING BANDWIDTH failed - As a result, aggregated link configurations are : ... fault-tolerant. However, if a port has LACP enabled, and if a more appropriate or correct automatic membership is physically connected to Switch B, but you will override the manual configuration. Implementing 802.3ad Aggregated Links LACP can be able to automatically detect and form an...