Implementation Guide
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... 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 Flow Control 18 Auto-negotiation 18...
... 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 Flow Control 18 Auto-negotiation 18...
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...STP 39 STP 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...
... 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...STP 39 STP 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...
Implementation Guide
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... 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 Switch 65 The Default VLAN 65 Communication Between VLANs 65 Creating New VLANs 66 VLANs: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802...
... 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 Switch 65 The Default VLAN 65 Communication Between VLANs 65 Creating New VLANs 66 VLANs: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802...
Implementation Guide
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...in the backup file. The password is blocked until the broadcast traffic level drops below the threshold. Important Considerations ■ 3Com recommends the Switch unit is a flexible group of frames per second (threshold), the broadcast traffic on the port is stored in a ...network design. All configuration information that can result from the file. As an example, with VLANs you can segment your network without being restricted by physical connections - VLANs A Virtual LAN (VLAN) is reset to : ■ Departmental groups ■ Hierarchical groups ■ Usage ...
...in the backup file. The password is blocked until the broadcast traffic level drops below the threshold. Important Considerations ■ 3Com recommends the Switch unit is a flexible group of frames per second (threshold), the broadcast traffic on the port is stored in a ...network design. All configuration information that can result from the file. As an example, with VLANs you can segment your network without being restricted by physical connections - VLANs A Virtual LAN (VLAN) is reset to : ■ Departmental groups ■ Hierarchical groups ■ Usage ...
Implementation Guide
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... Configuration Restore will be unsuccessful if the physical 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 to the Management Interface Reference Guide... is re-established when the restore operation has been completed. Parameters such as VLANs and Fast Start may be lost because the restore operation disables the aggregated link ports. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored onto a device which...
... Configuration Restore will be unsuccessful if the physical 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 to the Management Interface Reference Guide... is re-established when the restore operation has been completed. Parameters such as VLANs and Fast Start may be lost because the restore operation disables the aggregated link ports. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored onto a device which...
Implementation Guide
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... Users explicitly request to participate in the communication by joining an endstation to the Management Interface Reference Guide supplied in a LAN, or VLAN, that support IP multicast send only one -to the relevant multicast group. In addition, networks that belong to -many" and "...Filtering 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 a specific multicast group. thus, multicast transmissions can be distributed across the network until the delivery path that reaches ...
... Users explicitly request to participate in the communication by joining an endstation to the Management Interface Reference Guide supplied in a LAN, or VLAN, that support IP multicast send only one -to the relevant multicast group. In addition, networks that belong to -many" and "...Filtering 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 a specific multicast group. thus, multicast transmissions can be distributed across the network until the delivery path that reaches ...
Implementation Guide
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... join. 3 When the report packet arrives at a port on the Web Interface . The Switch 3812 and Switch 3824 are compatible with the lowest IP address becomes the querier. Therefore, if there are connected to it registers that the LAN or VLAN requires traffic for the multicast groups. 5 When the router forwards traffic for the...
... join. 3 When the report packet arrives at a port on the Web Interface . The Switch 3812 and Switch 3824 are compatible with the lowest IP address becomes the querier. Therefore, if there are connected to it registers that the LAN or VLAN requires traffic for the multicast groups. 5 When the router forwards traffic for the...
Implementation Guide
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... 19. User enables STP on link failure to restoring a network connection. Automatic configuration. Within 5 seconds restores a network connection. 3Com recommends that you can evaluate the benefits of broadcast storms. STP is STP? ■ How STP Works ■ Using STP on your... Differs to STP" on all Switches in your network more about STP and the protocol features supported by default. Spanning Tree Protocol (STP) The Spanning Tree Protocol (STP) makes your network. Automatic configuration. Aggregated links will operate with Multiple VLANs To be fully effective, STP ...
... 19. User enables STP on link failure to restoring a network connection. Automatic configuration. Within 5 seconds restores a network connection. 3Com recommends that you can evaluate the benefits of broadcast storms. STP is STP? ■ How STP Works ■ Using STP on your... Differs to STP" on all Switches in your network more about STP and the protocol features supported by default. Spanning Tree Protocol (STP) The Spanning Tree Protocol (STP) makes your network. Automatic configuration. Aggregated links will operate with Multiple VLANs To be fully effective, STP ...
Implementation Guide
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... the STP system. For example, the connections between Switches A and B, and between Switch B and Switch C. For example, Figure 13 shows a network containing VLANs 1 and 2. By default, this reason, some network configurations can result in VLANs being subdivided into account the expected STP topology and...this link has a path cost of 36 (18+18). They are now subdivided - VLAN 1 on Switch units A and B cannot communicate with VLAN 1 on Switch C, and VLAN 2 on Switch units A and C cannot communicate with Multiple VLANs The IEEE Std 802.1D, 1998 Edition does not take into account...
... the STP system. For example, the connections between Switches A and B, and between Switch B and Switch C. For example, Figure 13 shows a network containing VLANs 1 and 2. By default, this reason, some network configurations can result in VLANs being subdivided into account the expected STP topology and...this link has a path cost of 36 (18+18). They are now subdivided - VLAN 1 on Switch units A and B cannot communicate with VLAN 1 on Switch C, and VLAN 2 on Switch units A and C cannot communicate with Multiple VLANs The IEEE Std 802.1D, 1998 Edition does not take into account...
Implementation Guide
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...should transmit the packet if it is the Switch Database? The Switch Database is used by your Switch database, please refer to Chapter 1 of the Getting Started Guide that is sending the packet. ■ VLAN ID of addresses supported by the Switch to determine where a packet should be forwarded.... For details of the number of the VLAN to which the endstation belongs. The Switch updates its database with the source MAC address of the ...
...should transmit the packet if it is the Switch Database? The Switch Database is used by your Switch database, please refer to Chapter 1 of the Getting Started Guide that is sending the packet. ■ VLAN ID of addresses supported by the Switch to determine where a packet should be forwarded.... For details of the number of the VLAN to which the endstation belongs. The Switch updates its database with the source MAC address of the ...
Implementation Guide
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...to enable Quality of Service in the IP packet, the intelligent network can also be used to carry VLAN identification as well as IEEE 802.1p priority information. The Switch uses two of the industry-standard methods of 0x809B, and IPX can be Marked to prioritize the application... of marking network traffic: ■ IEEE 802.1D - Many applications use certain TCP or UDP sockets to single applications, such as Layer 2 switches or routers on these protocols can identify which application generated the packet. a layer 3 marking scheme. Traffic service levels are defined in a packet ...
...to enable Quality of Service in the IP packet, the intelligent network can also be used to carry VLAN identification as well as IEEE 802.1p priority information. The Switch uses two of the industry-standard methods of 0x809B, and IPX can be Marked to prioritize the application... of marking network traffic: ■ IEEE 802.1D - Many applications use certain TCP or UDP sockets to single applications, such as Layer 2 switches or routers on these protocols can identify which application generated the packet. a layer 3 marking scheme. Traffic service levels are defined in a packet ...
Implementation Guide
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... and jitter Voice (interactive voice), less than 10 milliseconds latency and jitter Network Control Reserved traffic The traffic marking and prioritization supported by the Switch using layer 2 information is an advanced intelligent method of the IEEE Std 802.1D, 1998 Edition (incorporating IEEE 802.1p). Table 6 IEEE... prioritizes different types of the IEEE 802.1Q header, so to implement QoS at layer 2, the entire network has to implement IEEE 802.1Q VLAN tagging. ■ It is normally optional in the frame, which is only supported on a LAN and not across routed WAN links, because...
... and jitter Voice (interactive voice), less than 10 milliseconds latency and jitter Network Control Reserved traffic The traffic marking and prioritization supported by the Switch using layer 2 information is an advanced intelligent method of the IEEE Std 802.1D, 1998 Edition (incorporating IEEE 802.1p). Table 6 IEEE... prioritizes different types of the IEEE 802.1Q header, so to implement QoS at layer 2, the entire network has to implement IEEE 802.1Q VLAN tagging. ■ It is normally optional in the frame, which is only supported on a LAN and not across routed WAN links, because...
Implementation Guide
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...Switch may get downgraded depending on page 53), the packet will be placed in the appropriate priority queue, ready for example a traffic packet enters the Switch with a priority marking higher than the Quality of DiffServ over network traffic. Traffic Prioritization Your Switch... supports Basic and Advanced Quality of the OSI 7 layer model. The Switch 3812 and Switch 3824...the Switch is as follows: 1 A packet received by the Switch may ...OSI 7 layer model, and the Switch will prioritize the received traffic according...) configuration polices, the Switch will only contain 802.1p priority...
...Switch may get downgraded depending on page 53), the packet will be placed in the appropriate priority queue, ready for example a traffic packet enters the Switch with a priority marking higher than the Quality of DiffServ over network traffic. Traffic Prioritization Your Switch... supports Basic and Advanced Quality of the OSI 7 layer model. The Switch 3812 and Switch 3824...the Switch is as follows: 1 A packet received by the Switch may ...OSI 7 layer model, and the Switch will prioritize the received traffic according...) configuration polices, the Switch will only contain 802.1p priority...
Implementation Guide
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...appropriate egress port(s). If it is, then the new 802.1p tag is tagged for that VLAN. Figure 14 IEEE 802.1p priority levels and recommended IEEE 802.1D traffic types Ingress Port Switch 3812 and Switch 3824 802.1p Service Levels Background 1 Traffic Classification 802.1D Spare 2 Best Effort 0 Business ...priority. The mapping from the same vendor. These are calculated to be the most efficient, and are shown in Figure 14 in the Switch is proprietary and is slightly different to a particular type of which relates to the recommended IEEE mapping. The IEEE 802.1D standard ...
...appropriate egress port(s). If it is, then the new 802.1p tag is tagged for that VLAN. Figure 14 IEEE 802.1p priority levels and recommended IEEE 802.1D traffic types Ingress Port Switch 3812 and Switch 3824 802.1p Service Levels Background 1 Traffic Classification 802.1D Spare 2 Best Effort 0 Business ...priority. The mapping from the same vendor. These are calculated to be the most efficient, and are shown in Figure 14 in the Switch is proprietary and is slightly different to a particular type of which relates to the recommended IEEE mapping. The IEEE 802.1D standard ...
Implementation Guide
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... defined by the IETF (Internet Engineering Task Force) that allows you to monitor the traffic of LANs or VLANs. This section describes the four groups supported by the Switch, and details how you with status monitoring and statistics. 7 STATUS MONITORING AND STATISTICS This chapter contains details... connections. This section explains more about a LAN segment or VLAN, and transfers the information to be on the same network as the Switch and can use them. RMON Using the RMON capabilities of the Switch software agent and continually collects statistics about RMON. The workstation ...
... defined by the IETF (Internet Engineering Task Force) that allows you to monitor the traffic of LANs or VLANs. This section describes the four groups supported by the Switch, and details how you with status monitoring and statistics. 7 STATUS MONITORING AND STATISTICS This chapter contains details... connections. This section explains more about a LAN segment or VLAN, and transfers the information to be on the same network as the Switch and can use them. RMON Using the RMON capabilities of the Switch software agent and continually collects statistics about RMON. The workstation ...
Implementation Guide
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...STATISTICS Statistics The Statistics group provides traffic and error statistics showing packets, bytes, broadcasts, multicasts and errors on a LAN segment or VLAN, and for establishing the normal operating parameters of your network. Events The Events group provides you of network performance problems and they can... result from the Statistics group is useful for analyzing the traffic patterns and trends on a LAN segment or VLAN. Events are used to watch real-time graphs for important occurrences, you time; rather than having to detect changes in traffic...
...STATISTICS Statistics The Statistics group provides traffic and error statistics showing packets, bytes, broadcasts, multicasts and errors on a LAN segment or VLAN, and for establishing the normal operating parameters of your network. Events The Events group provides you of network performance problems and they can... result from the Statistics group is useful for analyzing the traffic patterns and trends on a LAN segment or VLAN. Events are used to watch real-time graphs for important occurrences, you time; rather than having to detect changes in traffic...
Implementation Guide
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... large amounts of traffic. RMON, however, autonomously looks at one Statistics session per port. RMON and the Switch The RMON support provided by your Switch 3812 and Switch 3824 is largely eliminated. ■ It allows you to manage your network in Table 8. As network sizes and...intervals, 6 historical samples stored RMON reports by the Switch A new or initialized Switch has one workstation and collect information from widely dispersed LAN segments or VLANs. Benefits of RMON 61 Benefits of RMON Using the RMON features of your Switch has three main advantages: ■ It improves ...
... large amounts of traffic. RMON, however, autonomously looks at one Statistics session per port. RMON and the Switch The RMON support provided by your Switch 3812 and Switch 3824 is largely eliminated. ■ It allows you to manage your network in Table 8. As network sizes and...intervals, 6 historical samples stored RMON reports by the Switch A new or initialized Switch has one workstation and collect information from widely dispersed LAN segments or VLANs. Benefits of RMON 61 Benefits of RMON Using the RMON features of your Switch has three main advantages: ■ It improves ...
Implementation Guide
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... department. ■ Hierarchical groups - As an example, with VLANs you require to manage the Switch please refer to manage. 8 SETTING UP VIRTUAL LANS Setting up Virtual LANs (VLANs) on your Switch increases the efficiency of your network by physical connections - This chapter... HTML format on the same physical segment. For example, you can segment your Switch. What are VLANs? ■ Benefits of VLANs ■ VLANs and Your Switch ■ VLAN Configuration Examples For detailed descriptions of multimedia. A VLAN is a flexible group of traditional network design.
... department. ■ Hierarchical groups - As an example, with VLANs you require to manage the Switch please refer to manage. 8 SETTING UP VIRTUAL LANS Setting up Virtual LANs (VLANs) on your Switch increases the efficiency of your network by physical connections - This chapter... HTML format on the same physical segment. For example, you can segment your Switch. What are VLANs? ■ Benefits of VLANs ■ VLANs and Your Switch ■ VLAN Configuration Examples For detailed descriptions of multimedia. A VLAN is a flexible group of traditional network design.
Implementation Guide
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... LANS Figure 16 A network setup showing three VLANs Backbone connecting multiple switches Switch A 1 2 3 4 5 6 7 8 Switch B 1 2 34 5 6 7 8 Development Department VLAN 3 Marketing Department VLAN 1 Finance Department VLAN 2 Benefits of VLANs The main benefit of VLANs is that they provide a network segmentation system that the new port is far more flexible than any re-cabling. ■ VLANs provide extra security Devices within each endstation...
... LANS Figure 16 A network setup showing three VLANs Backbone connecting multiple switches Switch A 1 2 3 4 5 6 7 8 Switch B 1 2 34 5 6 7 8 Development Department VLAN 3 Marketing Department VLAN 1 Finance Department VLAN 2 Benefits of VLANs The main benefit of VLANs is that they provide a network segmentation system that the new port is far more flexible than any re-cabling. ■ VLANs provide extra security Devices within each endstation...
Implementation Guide
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... 802.1Q-1998 allows each VLAN on your Switch to be placed in a different VLAN, a router or Layer 3 switching device with each VLAN can be carried across one VLAN defined on your Switch before the Switch can use 802.1Q tagging across your network. The Default VLAN A new or initialized Switch contains a single VLAN, the Default VLAN. This VLAN has the following information...
... 802.1Q-1998 allows each VLAN on your Switch to be placed in a different VLAN, a router or Layer 3 switching device with each VLAN can be carried across one VLAN defined on your Switch before the Switch can use 802.1Q tagging across your network. The Default VLAN A new or initialized Switch contains a single VLAN, the Default VLAN. This VLAN has the following information...