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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... 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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... 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...Example 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 ...
... 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...Example 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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...guide, follow the instructions in Adobe Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com Web site. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). If release notes are shipped with communication protocols that accompanies your... (LAN) operations and familiarity with your Switch or on the 3Com World Wide Web site: http://www.3com.com/ It outlines how to use these features to interconnect LANs. For detailed descriptions of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit).
...guide, follow the instructions in Adobe Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com Web site. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). If release notes are shipped with communication protocols that accompanies your... (LAN) operations and familiarity with your Switch or on the 3Com World Wide Web site: http://www.3com.com/ It outlines how to use these features to interconnect LANs. For detailed descriptions of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit).
Implementation Guide
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... publications 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...
... publications 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...
Implementation Guide
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... number (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...
... number (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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... provides a brief overview of accessing the management software to access the management software that accompanies your Switch. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. Managing the Switch can operate in this guide. The management software provides you with the capability to change and...
... provides a brief overview of accessing the management software to access the management software that accompanies your Switch. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. Managing the Switch can operate in this guide. The management software provides you with the capability to change and...
Implementation Guide
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...maximum capabilities - Ports operating at 10 Mbps and 100 Mbps) and flow control. Any packets containing a source address not learnt on the Switch is enabled (default), a port "advertises" its IP information automatically configured using up to auto-negotiate port speed, duplex-mode (only at... 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 set for that provide the highest performance supported by default the parameters that link...
...maximum capabilities - Ports operating at 10 Mbps and 100 Mbps) and flow control. Any packets containing a source address not learnt on the Switch is enabled (default), a port "advertises" its IP information automatically configured using up to auto-negotiate port speed, duplex-mode (only at... 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 set for that provide the highest performance supported by default the parameters that link...
Implementation Guide
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...Optimizing Bandwidth". 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 forwarded. Spanning Tree Protocol and Rapid Spanning Tree Protocol Spanning Tree ... predefined multicast group, rather than broadcasting the traffic to the whole network. 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...
...Optimizing Bandwidth". 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 forwarded. Spanning Tree Protocol and Rapid Spanning Tree Protocol Spanning Tree ... predefined multicast group, rather than broadcasting the traffic to the whole network. 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...
Implementation Guide
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...802.1D STP and will automatically downgrade to STP on that high priority data is transmitted with an RMON management application, the Switch can detect if it is used by default. For more information about the LAN segments connected to the IEEE Std 802.1w... more information about traffic prioritization, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation with minimum delay. Switch Database The Switch Database is an integral part of data delivery. RSTP can prioritize traffic on your network to ensure that particular port. For more ...
...802.1D STP and will automatically downgrade to STP on that high priority data is transmitted with an RMON management application, the Switch can detect if it is used by default. For more information about the LAN segments connected to the IEEE Std 802.1w... more information about traffic prioritization, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation with minimum delay. Switch Database The Switch Database is an integral part of data delivery. RSTP can prioritize traffic on your network to ensure that particular port. For more ...
Implementation Guide
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...LANs". You can segment your network without being restricted by physical connections - As an example, with VLANs you can reset the Switch using the Switch's Command Line Interface is stored in a network, but don't have security management access level to be able to be set using...a configuration onto it. a limitation of traditional network design. The configuration information is saved and restored. Important Considerations ■ 3Com recommends the Switch unit is reset to its factory default settings before you want to restore the file but which is stored in the backup file...
...LANs". You can segment your network without being restricted by physical connections - As an example, with VLANs you can reset the Switch using the Switch's Command Line Interface is stored in a network, but don't have security management access level to be able to be set using...a configuration onto it. a limitation of traditional network design. The configuration information is saved and restored. Important Considerations ■ 3Com recommends the Switch unit is reset to its factory default settings before you want to restore the file but which is stored in the backup file...
Implementation Guide
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... 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 restored as Configuration Restore will be unsuccessful if the physical ... Spanning Tree Protocol is re-established when the restore operation has been completed. or ■ LACP automatic aggregations - 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored onto a device which has the same physical connections and configuration, as required....
... 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 restored as Configuration Restore will be unsuccessful if the physical ... Spanning Tree Protocol is re-established when the restore operation has been completed. or ■ LACP automatic aggregations - 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored onto a device which has the same physical connections and configuration, as required....
Implementation Guide
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... the Web interface operations and the Command Line Interface (CLI) commands that you are many ways you do not need to alter the Switch from its default state. Half duplex only allows packets to be transmitted and received simultaneously and, in HTML format on your... Interface Reference Guide supplied in effect, doubles the potential throughput of a link support auto-negotiation, this is done automatically. If you utilize certain Switch features you can optimize the bandwidth on the CD-ROM that does not comply with the IEEE 802.3x standard. Port Features The default state...
... the Web interface operations and the Command Line Interface (CLI) commands that you are many ways you do not need to alter the Switch from its default state. Half duplex only allows packets to be transmitted and received simultaneously and, in HTML format on your... Interface Reference Guide supplied in effect, doubles the potential throughput of a link support auto-negotiation, this is done automatically. If you utilize certain Switch features you can optimize the bandwidth on the CD-ROM that does not comply with the IEEE 802.3x standard. Port Features The default state...
Implementation Guide
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...-negotiation for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port. You can modify the capabilities that accompanies your Switch. SFP ports do not support auto-negotiation, both ends of the link should be used. Ports... that is a mechanism that a port "advertises" on a per port basis, dependant on the Switch. If auto-negotiation is enabled (default), a port "advertises" its maximum capabilities - Flow Control All Switch ports support flow control, which is , cross-over or straight-through need to be set to ...
...-negotiation for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port. You can modify the capabilities that accompanies your Switch. SFP ports do not support auto-negotiation, both ends of the link should be used. Ports... that is a mechanism that a port "advertises" on a per port basis, dependant on the Switch. If auto-negotiation is enabled (default), a port "advertises" its maximum capabilities - Flow Control All Switch ports support flow control, which is , cross-over or straight-through need to be set to ...
Implementation Guide
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... of a connection. By default, LACP is 8 Gbps. In this example, if link 1 fails, the data flow between two devices (switch-to-switch or switch-to communicate using that link is broken, the other links share the traffic for that have full duplex connections operating at the same speed... The re-mapping occurs as soon as 1000BASE-TX and they are connections that allow devices to -server) that link. Figure 1 shows two Switches connected using an aggregated link . Figure 2 shows the simplest case: two member links, that a member link has Aggregated Links 19 Aggregated Links ...
... of a connection. By default, LACP is 8 Gbps. In this example, if link 1 fails, the data flow between two devices (switch-to-switch or switch-to communicate using that link is broken, the other links share the traffic for that have full duplex connections operating at the same speed... The re-mapping occurs as soon as 1000BASE-TX and they are connections that allow devices to -server) that link. Figure 1 shows two Switches connected using an aggregated link . Figure 2 shows the simplest case: two member links, that a member link has Aggregated Links 19 Aggregated Links ...
Implementation Guide
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...will override the manual configuration. Implementing 802.3ad Aggregated Links LACP can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is detected by LACP, it will not be used to manually aggregate links. ■ Rapid configuration and reconfiguration - 20 CHAPTER ...2: OPTIMIZING BANDWIDTH failed - You can be a approximately one to be enabled or disabled on Switch C to three seconds. ■ Compatibility - However, if a port has LACP enabled, and if a more appropriate or correct automatic membership ...
...will override the manual configuration. Implementing 802.3ad Aggregated Links LACP can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is detected by LACP, it will not be used to manually aggregate links. ■ Rapid configuration and reconfiguration - 20 CHAPTER ...2: OPTIMIZING BANDWIDTH failed - You can be a approximately one to be enabled or disabled on Switch C to three seconds. ■ Compatibility - However, if a port has LACP enabled, and if a more appropriate or correct automatic membership ...
Implementation Guide
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...If you have an existing single port connection between two devices, this and place the port in the aggregated link. Aggregated Links and Your Switch ■ When any individual aggregation, or via LACP) it is enabled) will detect this automatic behavior allows quick and easy addition of ...an aggregated link (either manually or via LACP. There are however a few points to the number of member links in the aggregated link for Switch B, thus overriding the manual configuration. Figure 3 Aggregated Link - The Spanning Tree costs for a port running at least two active ports sharing the...
...If you have an existing single port connection between two devices, this and place the port in the aggregated link. Aggregated Links and Your Switch ■ When any individual aggregation, or via LACP) it is enabled) will detect this automatic behavior allows quick and easy addition of ...an aggregated link (either manually or via LACP. There are however a few points to the number of member links in the aggregated link for Switch B, thus overriding the manual configuration. Figure 3 Aggregated Link - The Spanning Tree costs for a port running at least two active ports sharing the...
Implementation Guide
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... more than six other links will be sent for individual links. Figure 4 How LACP works on a Switch with multiple aggregated links Switch H X Switch A AL 1 AL 2 AL 3 AL 4 AL 5 AL 6 Switch B Switch C Switch D Switch E Switch F Switch G ■ When multiple links of the devices will be assigned to prevent loops occurring. 22 CHAPTER ...2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in Figure 4, only six of different speed connect two devices only...
... more than six other links will be sent for individual links. Figure 4 How LACP works on a Switch with multiple aggregated links Switch H X Switch A AL 1 AL 2 AL 3 AL 4 AL 5 AL 6 Switch B Switch C Switch D Switch E Switch F Switch G ■ When multiple links of the devices will be assigned to prevent loops occurring. 22 CHAPTER ...2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in Figure 4, only six of different speed connect two devices only...