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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... the software described herein are provided to you subject to you are a United States government agency, then this User Guide. All other countries. 3Com, the 3Com logo and SuperStack are commercial in conjunction with a low heavy-metal content. Maximizing the recyclable and reusable content of all products can be environmentally-friendly in content...
... the software described herein are provided to you subject to you are a United States government agency, then this User Guide. All other countries. 3Com, the 3Com logo and SuperStack are commercial in conjunction with a low heavy-metal content. Maximizing the recyclable and reusable content of all products can be environmentally-friendly in content...
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
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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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... ABOUT THIS GUIDE This guide describes the features of the specific features your network. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). For detailed descriptions of local area network (LAN) operations and familiarity ... operations and the Command Line Interface (CLI) commands that accompanies your Switch or on the 3Com World Wide Web site: http://www.3com.com/ 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).
... ABOUT THIS GUIDE This guide describes the features of the specific features your network. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). For detailed descriptions of local area network (LAN) operations and familiarity ... operations and the Command Line Interface (CLI) commands that accompanies your Switch or on the 3Com World Wide Web site: http://www.3com.com/ 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).
Implementation Guide
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Example: Words in italics Press Ctrl+Alt+Del Italics are used to: ■ Emphasize a point. ■ Denote a new term at the place where it appears on the screen. Click OK. Example: To display port information, enter the following syntax: system password Commands In this example, you to an application, system, or device Warning Information that alerts you must evaluate the syntax provided and then supply the appropriate values for . If you must enter the command exactly as it is defined in angle brackets. Syntax The word "syntax" means that you must type ...
Example: Words in italics Press Ctrl+Alt+Del Italics are used to: ■ Emphasize a point. ■ Denote a new term at the place where it appears on the screen. Click OK. Example: To display port information, enter the following syntax: system password Commands In this example, you to an application, system, or device Warning Information that alerts you must evaluate the syntax provided and then supply the appropriate values for . If you must enter the command exactly as it is defined in angle brackets. Syntax The word "syntax" means that you must type ...
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... enable you . Please e-mail comments about the current software release, including new features, modifications, and known problems. There are very important 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 need to install and set up the...
... enable you . Please e-mail comments about the current software release, including new features, modifications, and known problems. There are very important 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 need to install and set up the...
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...) ■ 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...-date information on -line, check the status of purchase to your product. You can only respond to comments and questions about 3Com product documentation at anytime, provides you to: process Repair Requests on your network supplier. Questions related to technical support or sales...
...) ■ 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...-date information on -line, check the status of purchase to your product. You can only respond to comments and questions about 3Com product documentation at anytime, provides you to: process Repair Requests on your network supplier. Questions related to technical support or sales...
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... management software to access the management software that accompanies your network. Your Switch can help you have to manage the Switch. Managing the Switch can operate in HTML format on 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 this guide...
... management software to access the management software that accompanies your network. Your Switch can help you have to manage the Switch. Managing the Switch can operate in HTML format on 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 this guide...
Implementation Guide
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...the port. Aggregated links provide two benefits: ■ They can potentially increase the bandwidth of port speed. Port Security Your Switch supports the following port security modes, which you can manually configure the IP information. The maximum number of ports: ■... currently learnt addresses on the port are made permanent. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can have its maximum capabilities - Any packets containing a source address not learnt on the Switch is enabled (default), a port "advertises" its IP information automatically configured...
...the port. Aggregated links provide two benefits: ■ They can potentially increase the bandwidth of port speed. Port Security Your Switch supports the following port security modes, which you can manually configure the IP information. The maximum number of ports: ■... currently learnt addresses on the port are made permanent. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can have its maximum capabilities - Any packets containing a source address not learnt on the Switch is enabled (default), a port "advertises" its IP information automatically configured...
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...the whole network. For more information about auto-negotiation and port capabilities, see Chapter 3 "Using Multicast Filtering". Flow Control All Switch ports support flow control, which multicast traffic should be transmitted and received simultaneously and, in effect, doubles the potential throughput of .... Flow control is supported on the network. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that accompanies your Switch. Duplex Full duplex mode allows packets to the Management Quick Reference Guide that are...
...the whole network. For more information about auto-negotiation and port capabilities, see Chapter 3 "Using Multicast Filtering". Flow Control All Switch ports support flow control, which multicast traffic should be transmitted and received simultaneously and, in effect, doubles the potential throughput of .... Flow control is supported on the network. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that accompanies your Switch. Duplex Full duplex mode allows packets to the Management Quick Reference Guide that are...
Implementation Guide
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... if it is used by default. STP conforms to the IEEE Std 802.1D, 1998 Edition and RSTP conforms to the Switch. The Switch software continually collects statistics about the LAN segments connected to the IEEE Std 802.1w-2001. RSTP is an enhanced version of... data delivery. For more information about traffic prioritization, see Chapter 4 "Using Resilience Features". Switch Database The Switch Database is an integral part of the less efficient paths if the most efficient path fails. You can restore a network connection quicker...
... if it is used by default. STP conforms to the IEEE Std 802.1D, 1998 Edition and RSTP conforms to the Switch. The Switch software continually collects statistics about the LAN segments connected to the IEEE Std 802.1w-2001. RSTP is an enhanced version of... data delivery. For more information about traffic prioritization, see Chapter 4 "Using Resilience Features". Switch Database The Switch Database is an integral part of the less efficient paths if the most efficient path fails. You can restore a network connection quicker...
Implementation Guide
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...and Restore The Configuration Save and Restore feature allows the configuration of your network according to save and restore the Switch configuration. Important Considerations ■ 3Com recommends the Switch unit is reset to its factory default settings before you can be saved as if they are on that ...port. VLANs A Virtual LAN (VLAN) is a flexible group of devices that can segment your Switch to restore the file but...
...and Restore The Configuration Save and Restore feature allows the configuration of your network according to save and restore the Switch configuration. Important Considerations ■ 3Com recommends the Switch unit is reset to its factory default settings before you can be saved as if they are on that ...port. VLANs A Virtual LAN (VLAN) is a flexible group of devices that can segment your Switch to restore the file but...
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...saved by a single user at a time. ■ When using the Configuration Save and Restore feature, 3Com recommends that unit may be enabled and Spanning Tree Protocol enabled. that accompanies your Switch. Parameters such as VLANs and Fast Start may be restored onto a device which has the same physical ... with manually defined ports are configured as either: ■ Manual aggregations with the aggregated link disabled. For detailed descriptions of the Switch must only be manually placed in HTML format on all ports and the aggregated links created automatically. 16 CHAPTER...
...saved by a single user at a time. ■ When using the Configuration Save and Restore feature, 3Com recommends that unit may be enabled and Spanning Tree Protocol enabled. that accompanies your Switch. Parameters such as VLANs and Fast Start may be restored onto a device which has the same physical ... with manually defined ports are configured as either: ■ Manual aggregations with the aggregated link disabled. For detailed descriptions of the Switch must only be manually placed in HTML format on all ports and the aggregated links created automatically. 16 CHAPTER...
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...provides the best configuration for example, if you do not need to be transmitted and received simultaneously and, in HTML format on your Switch. If the devices at either end of a link support auto-negotiation, this is done automatically. To communicate effectively, both devices at... downtime For detailed descriptions of the Web interface operations and the Command Line Interface (CLI) commands that you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of a link. Duplex Full duplex allows ...
...provides the best configuration for example, if you do not need to be transmitted and received simultaneously and, in HTML format on your Switch. If the devices at either end of a link support auto-negotiation, this is done automatically. To communicate effectively, both devices at... downtime For detailed descriptions of the Web interface operations and the Command Line Interface (CLI) commands that you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of a link. Duplex Full duplex allows ...
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...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 the ports. You can modify the capabilities that a port "advertises" on a per port. You can... disable auto-negotiation for ports operating in half duplex mode. Flow control prevents packet loss by default the parameters that accompanies your Switch. these capabilities are by inhibiting the transmitting port from generating more devices sending traffic to full duplex or half duplex accordingly. You...
...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 the ports. You can modify the capabilities that a port "advertises" on a per port. You can... disable auto-negotiation for ports operating in half duplex mode. Flow control prevents packet loss by default the parameters that accompanies your Switch. these capabilities are by inhibiting the transmitting port from generating more devices sending traffic to full duplex or half duplex accordingly. You...
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...aggregated links which use the Link Aggregation Control Protocol (LACP). Figure 2 shows the simplest case: two member links, that link. Figure 1 Switch units connected using an aggregated link containing four member links. By default, LACP is the physical links, form an aggregated link. In this example..., if link 1 fails, the data flow between two devices (switch-to-switch or switch-to-server) that a member link has Figure 1 shows two Switches connected using an aggregated link . The capacity of the connection is broken, the other links share the...
...aggregated links which use the Link Aggregation Control Protocol (LACP). Figure 2 shows the simplest case: two member links, that link. Figure 1 Switch units connected using an aggregated link containing four member links. By default, LACP is the physical links, form an aggregated link. In this example..., if link 1 fails, the data flow between two devices (switch-to-switch or switch-to-server) that a member link has Figure 1 shows two Switches connected using an aggregated link . The capacity of the connection is broken, the other links share the...
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...non-802.3ad devices can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is detected by LACP, it will need to be enabled or disabled on Switch C to automatically detect and form an aggregation with 802.3ad enabled devices. 20 CHAPTER 2: ...As a result, aggregated link configurations are : ■ Automatic configuration - Implementing 802.3ad Aggregated Links LACP can manually add and remove ports to Switch B, but you will override the manual configuration. However, if a port has LACP enabled, and if a more appropriate or correct automatic membership ...
...non-802.3ad devices can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is detected by LACP, it will need to be enabled or disabled on Switch C to automatically detect and form an aggregation with 802.3ad enabled devices. 20 CHAPTER 2: ...As a result, aggregated link configurations are : ■ Automatic configuration - Implementing 802.3ad Aggregated Links LACP can manually add and remove ports to Switch B, but you will override the manual configuration. However, if a port has LACP enabled, and if a more appropriate or correct automatic membership ...