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DUA1750-0BAA01 Published December 2003 SuperStack® 3 Switch 3226 and Switch 3250 Implementation Guide 3CR17500-91 3CR17501-91 http://www.3com.com/ Part No.
DUA1750-0BAA01 Published December 2003 SuperStack® 3 Switch 3226 and Switch 3250 Implementation Guide 3CR17500-91 3CR17501-91 http://www.3com.com/ Part No.
Implementation Guide
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... recognized environmental standards. ENVIRONMENTAL STATEMENT It is applicable. Ensuring that all waste conforms to remove or deface any portion of 3Com Corporation. The varnish is a registered trademark in other countries. 3Com, SuperStack, and the 3Com logo are unable to you are registered trademarks of any time. All rights reserved. If you in any form...
... recognized environmental standards. ENVIRONMENTAL STATEMENT It is applicable. Ensuring that all waste conforms to remove or deface any portion of 3Com Corporation. The varnish is a registered trademark in other countries. 3Com, SuperStack, and the 3Com logo are unable to you are registered trademarks of any time. All rights reserved. If you in any form...
Implementation Guide
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... Explained 13 Aggregated Links 14 Auto-negotiation 14 Configuration Save and Restore 15 Multicast Filtering 16 Rapid Spanning Tree Protocol 16 Switch Database 17 Traffic Prioritization 17 Rate Limiting 17 RMON 17 Broadcast Storm Control 18 VLANs 18 Automatic IP Configuration 18 Port Security 18 IP Routing ...
... Explained 13 Aggregated Links 14 Auto-negotiation 14 Configuration Save and Restore 15 Multicast Filtering 16 Rapid Spanning Tree Protocol 16 Switch Database 17 Traffic Prioritization 17 Rate Limiting 17 RMON 17 Broadcast Storm Control 18 VLANs 18 Automatic IP Configuration 18 Port Security 18 IP Routing ...
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...Example 27 3 USING MULTICAST FILTERING What is an IP Multicast? 29 Benefits of Multicast 30 Multicast Filtering 30 Multicast Filtering and Your Switch 31 IGMP Multicast Filtering 31 How IGMP Supports IP Multicast 32 Role of IGMP in IP Multicast Filtering 34 4 USING RESILIENCE FEATURES ... STP Example 40 STP Configurations 42 Using STP on a Network with Multiple VLANs 44 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 MANAGEMENT What is Traffic Prioritization? 47 How Traffic Prioritization Works 48...
...Example 27 3 USING MULTICAST FILTERING What is an IP Multicast? 29 Benefits of Multicast 30 Multicast Filtering 30 Multicast Filtering and Your Switch 31 IGMP Multicast Filtering 31 How IGMP Supports IP Multicast 32 Role of IGMP in IP Multicast Filtering 34 4 USING RESILIENCE FEATURES ... STP Example 40 STP Configurations 42 Using STP on a Network with Multiple VLANs 44 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 MANAGEMENT What is Traffic Prioritization? 47 How Traffic Prioritization Works 48...
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... classification 48 DiffServ traffic classification 49 IP Port traffic classification 50 Traffic Prioritization and your Switch 51 Limiting the Rate of a Port 52 Traffic Prioritization and Rate Limiting 53 7 STATUS...RMON? 55 The RMON Groups 55 Benefits of RMON 57 RMON and the Switch 57 Alarm Events 58 8 SETTING UP VIRTUAL LANS What are VLANs? 59 Benefits of VLANs 60 VLANs and ...Using 802.1Q Tagged Connections 65 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 67 How Automatic IP Configuration Works 68 Automatic Process 68 Important Considerations 68 Server Support 68
... classification 48 DiffServ traffic classification 49 IP Port traffic classification 50 Traffic Prioritization and your Switch 51 Limiting the Rate of a Port 52 Traffic Prioritization and Rate Limiting 53 7 STATUS...RMON? 55 The RMON Groups 55 Benefits of RMON 57 RMON and the Switch 57 Alarm Events 58 8 SETTING UP VIRTUAL LANS What are VLANs? 59 Benefits of VLANs 60 VLANs and ...Using 802.1Q Tagged Connections 65 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 67 How Automatic IP Configuration Works 68 Automatic Process 68 Important Considerations 68 Server Support 68
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... Control List Rules Work 74 Port Security 74 What is Network Login? 75 How Network Login Works 75 Important Considerations 76 What is Switch Management Login? 77 Benefits of RADIUS Authentication 77 How RADIUS Authentication Works 78 Important Considerations 79 What is RADIUS? 80 11 IP ROUTING...Environment 82 What is IP Routing? 83 Benefits of IP Routing 84 IP Routing Concepts 84 Router Interfaces 84 Routing Tables 85 Layer 3 Switching 86 Multiple IP Interfaces per VLAN 87 Implementing IP Routing 88 Configuring IP VLANs 88 Establishing IP Interfaces 88 IP Routing Protocols 90 Routing Information...
... Control List Rules Work 74 Port Security 74 What is Network Login? 75 How Network Login Works 75 Important Considerations 76 What is Switch Management Login? 77 Benefits of RADIUS Authentication 77 How RADIUS Authentication Works 78 Important Considerations 79 What is RADIUS? 80 11 IP ROUTING...Environment 82 What is IP Routing? 83 Benefits of IP Routing 84 IP Routing Concepts 84 Router Interfaces 84 Routing Tables 85 Layer 3 Switching 86 Multiple IP Interfaces per VLAN 87 Implementing IP Routing 88 Configuring IP VLANs 88 Establishing IP Interfaces 88 IP Routing Protocols 90 Routing Information...
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A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 99 Configuration Rules for Fast Ethernet 100 Configuration Rules with Full Duplex 101 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Example 104 Desktop Switch Example 104 Advanced Network Configuration Example 105 Edge Switch Example 105 C IP ADDRESSING IP Addresses 107 Simple Overview 107 Advanced Overview 108 Subnets and Subnet Masks 110 Default Gateways 112 D ADVANCED IP ROUTING CONCEPTS Variable Length Subnet Masks (VLSMs) 113 Supernetting 114 GLOSSARY INDEX
A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 99 Configuration Rules for Fast Ethernet 100 Configuration Rules with Full Duplex 101 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Example 104 Desktop Switch Example 104 Advanced Network Configuration Example 105 Edge Switch Example 105 C IP ADDRESSING IP Addresses 107 Simple Overview 107 Advanced Overview 108 Subnets and Subnet Masks 110 Default Gateways 112 D ADVANCED IP ROUTING CONCEPTS Variable Length Subnet Masks (VLSMs) 113 Supernetting 114 GLOSSARY INDEX
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... Portable Document Format (PDF) or HTML on the 3Com Web site. It assumes a working knowledge of the Web interface operations and the Command Line Interface (CLI) commands that applies to optimize the performance of the 3Com® SuperStack® 3 Switch 3226 (3CR17500-91) and 3Com® SuperStack® 3 Switch 3250 (3CR17501-91). It outlines how to use these features to both...
... Portable Document Format (PDF) or HTML on the 3Com Web site. It assumes a working knowledge of the Web interface operations and the Command Line Interface (CLI) commands that applies to optimize the performance of the 3Com® SuperStack® 3 Switch 3226 (3CR17500-91) and 3Com® SuperStack® 3 Switch 3250 (3CR17501-91). It outlines how to use these features to both...
Implementation Guide
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Example: To change your password, use the following command: The words "enter" and "type" Keyboard key names bridge port detail When you see the word "enter" in this guide. Table 1 Notice Icons Icon Notice Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application, system, or device Warning Information that are used to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents ...
Example: To change your password, use the following command: The words "enter" and "type" Keyboard key names bridge port detail When you see the word "enter" in this guide. Table 1 Notice Icons Icon Notice Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application, system, or device Warning Information that are used to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents ...
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...; information on how to access the management software to begin managing your Switch. ■ SuperStack 3 Switch 3226 and SuperStack 3 Switch 3250 Management Interface Reference Guide This guide provides detailed information about the Web interface and Command Line Interface that accompanies your Switch. ■ SuperStack 3 Switch 3226 and SuperStack 3 Switch 3250 Management Quick Reference Guide This guide contains: ■ a list of the Web...
...; information on how to access the management software to begin managing your Switch. ■ SuperStack 3 Switch 3226 and SuperStack 3 Switch 3250 Management Interface Reference Guide This guide provides detailed information about the Web interface and Command Line Interface that accompanies your Switch. ■ SuperStack 3 Switch 3226 and SuperStack 3 Switch 3250 Management Quick Reference Guide This guide contains: ■ a list of the Web...
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12 ABOUT THIS GUIDE Please include the following information when contacting us: ■ Document title ■ Document part number (on the title page) ■ Page number (if appropriate) Example: ■ SuperStack® 3 Switch 3226 and Switch 3250 Implementation Guide ■ Part number: DUA1750-0BAA01 ■ Page 25 Please note that we can only respond to your network supplier. Questions related to technical support or sales should be directed in the first instance to comments and questions about 3Com product documentation at this e-mail address.
12 ABOUT THIS GUIDE Please include the following information when contacting us: ■ Document title ■ Document part number (on the title page) ■ Page number (if appropriate) Example: ■ SuperStack® 3 Switch 3226 and Switch 3250 Implementation Guide ■ Part number: DUA1750-0BAA01 ■ Page 25 Please note that we can only respond to your network supplier. Questions related to technical support or sales should be directed in the first instance to comments and questions about 3Com product documentation at this e-mail address.
Implementation Guide
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...? These methods are explained in HTML format on the Switch. their applications are several different methods of the Switch features. Managing the Switch can operate in this guide. 1 SWITCH FEATURES OVERVIEW What is known as managing the Switch. There are explained in more detail later in its efficiency... and therefore the overall performance of the features supported by the Switch, and to change the default state of some of accessing the management software to the Management Interface Reference Guide supplied...
...? These methods are explained in HTML format on the Switch. their applications are several different methods of the Switch features. Managing the Switch can operate in this guide. 1 SWITCH FEATURES OVERVIEW What is known as managing the Switch. There are explained in more detail later in its efficiency... and therefore the overall performance of the features supported by the Switch, and to change the default state of some of accessing the management software to the Management Interface Reference Guide supplied...
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... crossover cables. Flow Control All Switch ports support flow control, which is a mechanism that minimizes packet loss during periods of congestion on the Switch 3250). these capabilities are by default the parameters that accompanies your Switch, please refer to the Management ...Quick Reference Guide that provide the highest performance supported by your Switch. This eliminates the need for link aggregation...
... crossover cables. Flow Control All Switch ports support flow control, which is a mechanism that minimizes packet loss during periods of congestion on the Switch 3250). these capabilities are by default the parameters that accompanies your Switch, please refer to the Management ...Quick Reference Guide that provide the highest performance supported by your Switch. This eliminates the need for link aggregation...
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...using the IEEE Std 802.3-2002 (incorporating 802.3x) on ports operating in an ASCII text file. Important Considerations ■ 3Com recommends the Switch unit is reset to 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 to its factory default settings before you restore a configuration onto it. The configuration information is different. ■ The configuration of the Switch must have read/write management access level to be ...
...using the IEEE Std 802.3-2002 (incorporating 802.3x) on ports operating in an ASCII text file. Important Considerations ■ 3Com recommends the Switch unit is reset to 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 to its factory default settings before you restore a configuration onto it. The configuration information is different. ■ The configuration of the Switch must have read/write management access level to be ...
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... ■ LACP automatic aggregations - The aggregated link should be set up as required. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that unit may be forwarded. one of the major causes of broadcast storms...ports. Parameters such as VLANs and Fast Start may be enabled and Spanning Tree Protocol enabled. The multicast filtering system supported by your Switch. For detailed descriptions of a predefined multicast group, rather than broadcasting the traffic to detect the endstations in HTML format on the ...
... ■ LACP automatic aggregations - The aggregated link should be set up as required. Multicast Filtering Multicast filtering allows the Switch to forward multicast traffic to only the endstations that unit may be forwarded. one of the major causes of broadcast storms...ports. Parameters such as VLANs and Fast Start may be enabled and Spanning Tree Protocol enabled. The multicast filtering system supported by your Switch. For detailed descriptions of a predefined multicast group, rather than broadcasting the traffic to detect the endstations in HTML format on the ...
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...systems. RSTP can detect if it is an industry standard feature for traffic monitoring and collecting network statistics. Switch Database The Switch Database is an integral part of network traffic reduces the stress on that important traffic is not held up... about rate limiting, see Chapter 6 "Using Traffic Management". For more information about RSTP, see Chapter 5 "Using the Switch Database". The Switch software continually collects statistics about traffic prioritization, see Chapter 6 "Using Traffic Management". RSTP conforms to be forwarded. For more...
...systems. RSTP can detect if it is an industry standard feature for traffic monitoring and collecting network statistics. Switch Database The Switch Database is an integral part of network traffic reduces the stress on that important traffic is not held up... about rate limiting, see Chapter 6 "Using Traffic Management". For more information about RSTP, see Chapter 5 "Using the Switch Database". The Switch software continually collects statistics about traffic prioritization, see Chapter 6 "Using Traffic Management". RSTP conforms to be forwarded. For more...
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... frames per second (threshold), the broadcast traffic on request or when a pre-defined threshold is exceeded. Automatic IP Configuration Your Switch can have its IP information automatically configured using a DHCP server. If the broadcast traffic level rises to a pre-defined number ...Automatic IP Configuration". Alternatively, you can segment your network without any restrictions. ■ Secure 18 CHAPTER 1: SWITCH FEATURES OVERVIEW management application, the Switch can transfer these statistics to your workstation on the port is blocked until the broadcast traffic level drops below ...
... frames per second (threshold), the broadcast traffic on request or when a pre-defined threshold is exceeded. Automatic IP Configuration Your Switch can have its IP information automatically configured using a DHCP server. If the broadcast traffic level rises to a pre-defined number ...Automatic IP Configuration". Alternatively, you can segment your network without any restrictions. ■ Secure 18 CHAPTER 1: SWITCH FEATURES OVERVIEW management application, the Switch can transfer these statistics to your workstation on the port is blocked until the broadcast traffic level drops below ...
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...server. Routing Information Protocol (RIP) RIP is a dynamic routing protocol that is used to join LANs at the network layer, that allows the Switch to adjust automatically to changes in network topology or traffic. It is Layer 3 of the OSI (Open Systems Interconnection) model. Any packets containing... on the port are made permanent. For more information about how Port Security works, see Chapter 11 "IP Routing" Switch Features Explained 19 All currently learnt addresses on the port will be dropped. ■ Network Login Connections are calculated between networks automatically.
...server. Routing Information Protocol (RIP) RIP is a dynamic routing protocol that is used to join LANs at the network layer, that allows the Switch to adjust automatically to changes in network topology or traffic. It is Layer 3 of the OSI (Open Systems Interconnection) model. Any packets containing... on the port are made permanent. For more information about how Port Security works, see Chapter 11 "IP Routing" Switch Features Explained 19 All currently learnt addresses on the port will be dropped. ■ Network Login Connections are calculated between networks automatically.
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20 CHAPTER 1: SWITCH FEATURES OVERVIEW
20 CHAPTER 1: SWITCH FEATURES OVERVIEW
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...or received at either end of If the devices at either end of a link must use the same duplex mode. 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... for all the features detailed below provides the best configuration for example, if you may wish to alter the Switch from its default state. If the devices at either end of a link. To communicate effectively, both devices at any one time. Duplex Full ...
...or received at either end of If the devices at either end of a link must use the same duplex mode. 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... for all the features detailed below provides the best configuration for example, if you may wish to alter the Switch from its default state. If the devices at either end of a link. To communicate effectively, both devices at any one time. Duplex Full ...