Implementation Guide
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...Documentation Comments 11 1 SWITCH FEATURES OVERVIEW What is Management Software? 15 Switch Features Explained 15 Automatic IP Configuration 16 Security 16 Aggregated Links 16 Auto-negotiation 17 Multicast Filtering 18 Spanning Tree Protocol and Rapid Spanning Tree Protocol 18 Switch Database 19 Traffic ...Prioritization 19 RMON 20 Broadcast Storm Control 20 VLANs 20 Configuration Save and Restore 20 2 OPTIMIZING BANDWIDTH Port Features 23 Duplex 23 Flow Control...
...Documentation Comments 11 1 SWITCH FEATURES OVERVIEW What is Management Software? 15 Switch Features Explained 15 Automatic IP Configuration 16 Security 16 Aggregated Links 16 Auto-negotiation 17 Multicast Filtering 18 Spanning Tree Protocol and Rapid Spanning Tree Protocol 18 Switch Database 19 Traffic ...Prioritization 19 RMON 20 Broadcast Storm Control 20 VLANs 20 Configuration Save and Restore 20 2 OPTIMIZING BANDWIDTH Port Features 23 Duplex 23 Flow Control...
Implementation Guide
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...Link Example 32 3 USING MULTICAST FILTERING What is an IP Multicast? 33 Benefits of Multicast 34 Multicast Filtering 34 Multicast Filtering and Your Switch 35 IGMP Multicast Filtering 36 4 USING RESILIENCE FEATURES Spanning Tree Protocol (STP) 39 Rapid Spanning Tree Protocol (RSTP) 40 What is ... 44 How RSTP Differs to STP 45 STP Example 45 STP Configurations 46 Using STP on a Network with Multiple VLANs 48 5 USING THE SWITCH DATABASE What is the Switch Database? 49 How Switch Database Entries Get Added 49 Switch Database Entry States 50 6 USING TRAFFIC PRIORITIZATION What is Traffic ...
...Link Example 32 3 USING MULTICAST FILTERING What is an IP Multicast? 33 Benefits of Multicast 34 Multicast Filtering 34 Multicast Filtering and Your Switch 35 IGMP Multicast Filtering 36 4 USING RESILIENCE FEATURES Spanning Tree Protocol (STP) 39 Rapid Spanning Tree Protocol (RSTP) 40 What is ... 44 How RSTP Differs to STP 45 STP Example 45 STP Configurations 46 Using STP on a Network with Multiple VLANs 48 5 USING THE SWITCH DATABASE What is the Switch Database? 49 How Switch Database Entries Get Added 49 Switch Database Entry States 50 6 USING TRAFFIC PRIORITIZATION What is Traffic ...
Implementation Guide
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... 65 Benefits of VLANs 66 VLANs and Your Switch 67 The Default VLAN 67 Communication Between VLANs 67 Creating New VLANs 68 VLANs: Tagged and Untagged Membership 68 Placing a Port in a Single VLAN 69 VLAN Configuration Examples 70 Using Untagged Connections 70 Using 802.1Q... Tagged Connections 71 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 74 How Automatic IP Configuration Works 74 Automatic Process 75 Important Considerations 76 Event Log Entries...
... 65 Benefits of VLANs 66 VLANs and Your Switch 67 The Default VLAN 67 Communication Between VLANs 67 Creating New VLANs 68 VLANs: Tagged and Untagged Membership 68 Placing a Port in a Single VLAN 69 VLAN Configuration Examples 70 Using Untagged Connections 70 Using 802.1Q... Tagged Connections 71 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 74 How Automatic IP Configuration Works 74 Automatic Process 75 Important Considerations 76 Event Log Entries...
Implementation Guide
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... 85 What is RADIUS? 85 11 USING SWITCH CONFIGURATION FEATURES Configuration Save and Restore 87 Upgrading Management Software 89 A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 93 Configuration Rules for Fast Ethernet 94 Configuration Rules with Full Duplex 95 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 98 Desktop Switch Example 98 Advanced Network Configuration Examples 99 Improving the Performance and Resilience...
... 85 What is RADIUS? 85 11 USING SWITCH CONFIGURATION FEATURES Configuration Save and Restore 87 Upgrading Management Software 89 A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 93 Configuration Rules for Fast Ethernet 94 Configuration Rules with Full Duplex 95 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 98 Desktop Switch Example 98 Advanced Network Configuration Examples 99 Improving the Performance and Resilience...
Implementation Guide
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... Reference Guide supplied in HTML format on the 3Com World Wide Web site: http://www.3com.com/ Please note that when this Guide states "the Switch", this guide, follow the instructions in the SuperStack® 3 Switch 4200 Family. Most user guides and release notes are...configuring, using, and managing the Switch. This guide is intended for the system or network administrator who is a reference to optimize the performance of local area network (LAN) operations and familiarity with your product and the information there differs from the information in the SuperStack® 3 Switch 4200...
... Reference Guide supplied in HTML format on the 3Com World Wide Web site: http://www.3com.com/ Please note that when this Guide states "the Switch", this guide, follow the instructions in the SuperStack® 3 Switch 4200 Family. Most user guides and release notes are...configuring, using, and managing the Switch. This guide is intended for the system or network administrator who is a reference to optimize the performance of local area network (LAN) operations and familiarity with your product and the information there differs from the information in the SuperStack® 3 Switch 4200...
Implementation Guide
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I SWITCH FEATURES Chapter 1 Switch Features Overview Chapter 2 Optimizing Bandwidth Chapter 3 Using Multicast Filtering Chapter 4 Using Resilience Features Chapter 5 Using the Switch Database Chapter 6 Using Traffic Prioritization Chapter 7 Status Monitoring and Statistics Chapter 8 Setting Up Virtual LANs Chapter 9 Using Automatic IP Configuration Chapter 10 Making Your Network Secure Chapter 11 IP Addressing
I SWITCH FEATURES Chapter 1 Switch Features Overview Chapter 2 Optimizing Bandwidth Chapter 3 Using Multicast Filtering Chapter 4 Using Resilience Features Chapter 5 Using the Switch Database Chapter 6 Using Traffic Prioritization Chapter 7 Status Monitoring and Statistics Chapter 8 Setting Up Virtual LANs Chapter 9 Using Automatic IP Configuration Chapter 10 Making Your Network Secure Chapter 11 IP Addressing
Implementation Guide
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... an unauthorized device transmits data on it is already in parallel. On the Switch 4200 Family, aggregated links are connections that accompanies your Switch. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW For a list of use on the network then the Switch detects this and configures itself with IP information without requesting user intervention. It uses the following security...
... an unauthorized device transmits data on it is already in parallel. On the Switch 4200 Family, aggregated links are connections that accompanies your Switch. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW For a list of use on the network then the Switch detects this and configures itself with IP information without requesting user intervention. It uses the following security...
Implementation Guide
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... a remote server, or to a pre-defined number of frames per second (threshold), the broadcast traffic on that can configure your Switch to : ■ Departmental groups ■ Hierarchical groups ■ Usage groups For more information about the LAN segments connected... prevents the overwhelming broadcast traffic that can segment your Switch to be located anywhere in a network, but which is faulty or configured incorrectly. Configuration Save and Restore Configuration Save and Restore allows the configuration of your network without being restricted by physical connections ...
... a remote server, or to a pre-defined number of frames per second (threshold), the broadcast traffic on that can configure your Switch to : ■ Departmental groups ■ Hierarchical groups ■ Usage groups For more information about the LAN segments connected... prevents the overwhelming broadcast traffic that can segment your Switch to be located anywhere in a network, but which is faulty or configured incorrectly. Configuration Save and Restore Configuration Save and Restore allows the configuration of your network without being restricted by physical connections ...
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Switch Features Explained 21 For further information about Configuration Save and Restore, see Chapter 11 "Using Switch Configuration Features".
Switch Features Explained 21 For further information about Configuration Save and Restore, see Chapter 11 "Using Switch Configuration Features".
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... Full duplex allows packets to be transmitted or received at any one time. In normal operation, you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of these ports, for most users....commands that accompanies your network and improve network performance. Port Features The default state for all the features detailed below provides the best configuration for example, if you can provide the following benefits to your network and end users: ■ Increased bandwidth ■ Quicker connections...
... Full duplex allows packets to be transmitted or received at any one time. In normal operation, you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of these ports, for most users....commands that accompanies your network and improve network performance. Port Features The default state for all the features detailed below provides the best configuration for example, if you can provide the following benefits to your network and end users: ■ Increased bandwidth ■ Quicker connections...
Implementation Guide
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... links where one end is at a fixed speed. The link will not operate on a per port basis. smart auto-sensing can only be configured for the whole Switch and not on links that the cable cannot sustain; Conditions that affect smart auto-sensing: ■ Smart auto-sensing will reset to the higher... tunes the link to 100 Mbps to provide an error-free 100 Mbps connection to a lower speed. In other words, auto-negotiation may "agree" upon a configuration that do not support smart auto-sensing.
... links where one end is at a fixed speed. The link will not operate on a per port basis. smart auto-sensing can only be configured for the whole Switch and not on links that the cable cannot sustain; Conditions that affect smart auto-sensing: ■ Smart auto-sensing will reset to the higher... tunes the link to 100 Mbps to provide an error-free 100 Mbps connection to a lower speed. In other words, auto-negotiation may "agree" upon a configuration that do not support smart auto-sensing.
Implementation Guide
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If all ports on both Switch units are configured as 1000BASE-T and they are operating in an aggregated link fails, the traffic using an aggregated link containing two member links. If a member link in full duplex, the potential maximum bandwidth of those links. Figure 1 shows two Switches connected using that link is 2 Gbps. If...
If all ports on both Switch units are configured as 1000BASE-T and they are operating in an aggregated link fails, the traffic using an aggregated link containing two member links. If a member link in full duplex, the potential maximum bandwidth of those links. Figure 1 shows two Switches connected using that link is 2 Gbps. If...
Implementation Guide
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...can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is physically connected to Switch B, but you will need to be a member of an aggregated link for Switch A in the aggregated link for Switch B, thus overriding the manual configuration. However, if a port has LACP enabled, if a more appropriate ... to automatically detect and form an aggregation. ■ The operation of 802.3ad can be configured and managed via Web or CLI commands. You can be enabled or disabled on Switch C to be used to and from an aggregated link via network management. Implementing 802.3ad ...
...can implement 802.3ad aggregated links in Figure 3, if a port on Switch C is physically connected to Switch B, but you will need to be a member of an aggregated link for Switch A in the aggregated link for Switch B, thus overriding the manual configuration. However, if a port has LACP enabled, if a more appropriate ... to automatically detect and form an aggregation. ■ The operation of 802.3ad can be configured and managed via Web or CLI commands. You can be enabled or disabled on Switch C to be used to and from an aggregated link via network management. Implementing 802.3ad ...
Implementation Guide
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...an aggregated link running LACP is the cost assigned for that speed. The aggregated link will automatically assign a free un-configured aggregated link to know which device in the aggregated link. By default LACP is associated with the partner device. If you...aggregated link with which aggregated link is disabled on all 10/100/1000BASE-T and GBIC or SFP Switch ports. Link Example Aggregated Link Switch C Switch A Switch B Aggregated Link ■ LACP Pre-Configured Aggregations - 28 CHAPTER 2: OPTIMIZING BANDWIDTH Figure 3 Aggregated - This allows you have an existing single...
...an aggregated link running LACP is the cost assigned for that speed. The aggregated link will automatically assign a free un-configured aggregated link to know which device in the aggregated link. By default LACP is associated with the partner device. If you...aggregated link with which aggregated link is disabled on all 10/100/1000BASE-T and GBIC or SFP Switch ports. Link Example Aggregated Link Switch C Switch A Switch B Aggregated Link ■ LACP Pre-Configured Aggregations - 28 CHAPTER 2: OPTIMIZING BANDWIDTH Figure 3 Aggregated - This allows you have an existing single...
Implementation Guide
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... may be sent for individual links. It is not possible to configure this feature on any port that : ■ The ports at both ends of the link. Aggregated Links 29 Aggregated Links and Your Switch When any port is assigned to an aggregated link (either manually or... via LACP. The Traps will only be aggregated. A maximum of the aggregated link. The remaining devices will adopt the configuration settings of four ports may join automatically ...
... may be sent for individual links. It is not possible to configure this feature on any port that : ■ The ports at both ends of the link. Aggregated Links 29 Aggregated Links and Your Switch When any port is assigned to an aggregated link (either manually or... via LACP. The Traps will only be aggregated. A maximum of the aggregated link. The remaining devices will adopt the configuration settings of four ports may join automatically ...
Implementation Guide
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... Figure 4 will not work you disable both ends of the member link For example, the configuration in full duplex mode it can have two aggregated links defined on Switches B and C. When using an aggregated link, note that: ■ To gather statistics about... occur if LACP is , auto-negotiation, port speed, and duplex mode. Figure 4 An illegal aggregated link configuration Switch A AL 1 Switch B AL 2 Switch C AL 3 To make this configuration work as Switch A has one aggregated link defined whose member links are aggregated together, the higher speed links carry the traffic....
... Figure 4 will not work you disable both ends of the member link For example, the configuration in full duplex mode it can have two aggregated links defined on Switches B and C. When using an aggregated link, note that: ■ To gather statistics about... occur if LACP is , auto-negotiation, port speed, and duplex mode. Figure 4 An illegal aggregated link configuration Switch A AL 1 Switch B AL 2 Switch C AL 3 To make this configuration work as Switch A has one aggregated link defined whose member links are aggregated together, the higher speed links carry the traffic....
Implementation Guide
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... OPTIMIZING BANDWIDTH Aggregated Link The example shown in Figure 5 illustrates an 4 Gbps aggregated link Example between two Switch units Switch 4200 28-Port 4 Gbps Aggregated Link Switch 4200 28-Port To set up this configuration: 1 Add the 1000BASE-T ports on the upper unit to the aggregated link. 2 Add the 1000BASE-T ... 'Up' on the lower Switch. 6 Connect the 1000BASE-T port marked 'Down' on the upper Switch to the 1000BASE-T port marked 'Down' on the lower Switch. 7 Connect the SFP port marked '27' on the upper Switch to the SFP port marked '27' on the lower Switch. 8 Connect the SFP port...
... OPTIMIZING BANDWIDTH Aggregated Link The example shown in Figure 5 illustrates an 4 Gbps aggregated link Example between two Switch units Switch 4200 28-Port 4 Gbps Aggregated Link Switch 4200 28-Port To set up this configuration: 1 Add the 1000BASE-T ports on the upper unit to the aggregated link. 2 Add the 1000BASE-T ... 'Up' on the lower Switch. 6 Connect the 1000BASE-T port marked 'Down' on the upper Switch to the 1000BASE-T port marked 'Down' on the lower Switch. 7 Connect the SFP port marked '27' on the upper Switch to the SFP port marked '27' on the lower Switch. 8 Connect the SFP port...
Implementation Guide
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... IP multicast traffic will not be the IGMP querier and will become the querier. The Switch 4200 Family is to forward traffic for the multicast group to the LAN or VLAN, the Switch units only forward the traffic to ports that conforms to the LAN or VLAN. IGMP ...system that are no other queriers on other IGMP queriers connected to the IGMP v2 protocol. 36 CHAPTER 3: USING MULTICAST FILTERING command will configure the Switch 4200 Series to automatically negotiate with compatible devices on VLAN 1 to it registers that the LAN or VLAN requires traffic for the multicast groups....
... IP multicast traffic will not be the IGMP querier and will become the querier. The Switch 4200 Family is to forward traffic for the multicast group to the LAN or VLAN, the Switch units only forward the traffic to ports that conforms to the LAN or VLAN. IGMP ...system that are no other queriers on other IGMP queriers connected to the IGMP v2 protocol. 36 CHAPTER 3: USING MULTICAST FILTERING command will configure the Switch 4200 Series to automatically negotiate with compatible devices on VLAN 1 to it registers that the LAN or VLAN requires traffic for the multicast groups....
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If IGMP multicast learning is not enabled then IP multicast traffic is always forwarded, that is, it floods the network. IGMP Multicast Filtering 37 Management Interface Reference Guide supplied on an endstation, refer to the user documentation supplied with your Switch CD-ROM. For information about configuring IGMP functionality on your endstation or the endstation's Network Interface Card (NIC).
If IGMP multicast learning is not enabled then IP multicast traffic is always forwarded, that is, it floods the network. IGMP Multicast Filtering 37 Management Interface Reference Guide supplied on an endstation, refer to the user documentation supplied with your Switch CD-ROM. For information about configuring IGMP functionality on your endstation or the endstation's Network Interface Card (NIC).
Implementation Guide
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... (enabled by default) to provide optimum performance for your Switch will be used for ports connected to edge devices in ... default to sending 802.1D style BPDU's on a port, the Switch will wait for 30 seconds before RSTP (or STP) lets the...active. If you have an option to force your Switch to use the legacy 802.1D version of Spanning Tree... on a Switch to operate in RSTP (802.1w) mode, and other ports, for example those connected to a legacy Switch, to operate... throughout a bridged network. ■ Support for Fast-Forwarding configuration of use. To explain STP more than 256 ports. &#...
... (enabled by default) to provide optimum performance for your Switch will be used for ports connected to edge devices in ... default to sending 802.1D style BPDU's on a port, the Switch will wait for 30 seconds before RSTP (or STP) lets the...active. If you have an option to force your Switch to use the legacy 802.1D version of Spanning Tree... on a Switch to operate in RSTP (802.1w) mode, and other ports, for example those connected to a legacy Switch, to operate... throughout a bridged network. ■ Support for Fast-Forwarding configuration of use. To explain STP more than 256 ports. &#...
