Implementation Guide
Page 4
Manual Configuration 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... 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...
Manual Configuration 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... 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
Page 12
... 2 "Optimizing Bandwidth". Any packets containing a source address not learnt on the Switch is broken, the other links share the traffic for an individual port or a...information automatically configured using up to eight links in parallel. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can have its maximum capabilities - Aggregated links provide two benefits: ■... Ports operating at 10 Mbps and 100 Mbps) and flow control. Port Security Your Switch supports the following port security modes, which you can provide redundancy - if one link ...
... 2 "Optimizing Bandwidth". Any packets containing a source address not learnt on the Switch is broken, the other links share the traffic for an individual port or a...information automatically configured using up to eight links in parallel. 12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can have its maximum capabilities - Aggregated links provide two benefits: ■... Ports operating at 10 Mbps and 100 Mbps) and flow control. Port Security Your Switch supports the following port security modes, which you can provide redundancy - if one link ...
Implementation Guide
Page 16
... re-established when the restore operation has been completed. Other combinations of the configuration. For detailed descriptions of the Switch must only be manually placed in HTML format on the CD-ROM that are 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 restored as when the configuration was initially saved. LACP automatic aggregations with manual ports. Communication over an aggregated link, communication with Link Aggregation Configuration Protocol (...
... re-established when the restore operation has been completed. Other combinations of the configuration. For detailed descriptions of the Switch must only be manually placed in HTML format on the CD-ROM that are 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 restored as when the configuration was initially saved. LACP automatic aggregations with manual ports. Communication over an aggregated link, communication with Link Aggregation Configuration Protocol (...
Implementation Guide
Page 18
... allows ports to an already overloaded port on the network. Ports operating at 10 Mbps and 100 Mbps) and flow control. Flow Control All Switch ports support flow control, which is enabled (default), a port "advertises" its maximum capabilities - Packet loss is implemented using the IEEE Std 802... that a port "advertises" on a per port. Ports at 1000 Mbps support full duplex mode only. Ports operating at both ends must be manually set to full duplex or half duplex accordingly. 18 CHAPTER 2: OPTIMIZING BANDWIDTH a link do not support auto-negotiation of port speed. You can ...
... allows ports to an already overloaded port on the network. Ports operating at 10 Mbps and 100 Mbps) and flow control. Flow Control All Switch ports support flow control, which is enabled (default), a port "advertises" its maximum capabilities - Packet loss is implemented using the IEEE Std 802... that a port "advertises" on a per port. Ports at 1000 Mbps support full duplex mode only. Ports operating at both ends must be manually set to full duplex or half duplex accordingly. 18 CHAPTER 2: OPTIMIZING BANDWIDTH a link do not support auto-negotiation of port speed. You can ...
Implementation Guide
Page 20
... - Figure 2 Dynamic Reassignment of Traffic Flows The key benefits of 802.3ad can manually add and remove ports to three seconds. ■ Compatibility - However, you manually configure the port on Switch C to be used to automatically detect and form an aggregation with 802.3ad enabled ...3ad link aggregation are extremely resilient and fault-tolerant. almost instantaneously. You can be enabled or disabled on Switch C is detected by LACP, it will not be able to manually aggregate links. ■ Rapid configuration and reconfiguration - However, if a port has LACP enabled, and...
... - Figure 2 Dynamic Reassignment of Traffic Flows The key benefits of 802.3ad can manually add and remove ports to three seconds. ■ Compatibility - However, you manually configure the port on Switch C to be used to automatically detect and form an aggregation with 802.3ad enabled ...3ad link aggregation are extremely resilient and fault-tolerant. almost instantaneously. You can be enabled or disabled on Switch C is detected by LACP, it will not be able to manually aggregate links. ■ Rapid configuration and reconfiguration - However, if a port has LACP enabled, and...
Implementation Guide
Page 21
...) will detect this automatic behavior allows quick and easy addition of six active aggregations can be added manually to any port is the cost assigned for Switch B, thus overriding the manual configuration. Figure 3 Aggregated Link - When a port leaves an aggregated link its original configuration settings are... however a few points to an aggregated link (either manually or via LACP. Example ■ LACP Automatic Aggregations - If LACP detects at that speed. Aggregated Links 21 member of an aggregated link for Switch A in error, LACP (if it will adopt the configuration...
...) will detect this automatic behavior allows quick and easy addition of six active aggregations can be added manually to any port is the cost assigned for Switch B, thus overriding the manual configuration. Figure 3 Aggregated Link - When a port leaves an aggregated link its original configuration settings are... however a few points to an aggregated link (either manually or via LACP. Example ■ LACP Automatic Aggregations - If LACP detects at that speed. Aggregated Links 21 member of an aggregated link for Switch A in error, LACP (if it will adopt the configuration...
Implementation Guide
Page 22
...The Traps will not be sent for an aggregation. 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 different speed connect two devices only the highest speed ...if one aggregated link. 22 CHAPTER 2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in any individual aggregation. ■ If multiple links are manually configuring aggregated links. ■ A member link port can only belong...
...The Traps will not be sent for an aggregation. 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 different speed connect two devices only the highest speed ...if one aggregated link. 22 CHAPTER 2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in any individual aggregation. ■ If multiple links are manually configuring aggregated links. ■ A member link port can only belong...
Implementation Guide
Page 24
...individual links that make up an aggregated link. Single-to prevent the possible occurrence of serious network issues such as possible. The Switch also has a mechanism to -multiple endstation conversations, on Aggregated Links To maximize throughput, all the links, except one - ...redirect the aggregated link traffic to configure the aggregated link at 1000 Mbps, full duplex). Manual Configuration Example The example shown in Figure 6 illustrates an 8 Gbps aggregated link between two Switch units, (that all the conversations between two devices, the ports in a number of...
...individual links that make up an aggregated link. Single-to prevent the possible occurrence of serious network issues such as possible. The Switch also has a mechanism to -multiple endstation conversations, on Aggregated Links To maximize throughput, all the links, except one - ...redirect the aggregated link traffic to configure the aggregated link at 1000 Mbps, full duplex). Manual Configuration Example The example shown in Figure 6 illustrates an 8 Gbps aggregated link between two Switch units, (that all the conversations between two devices, the ports in a number of...
Implementation Guide
Page 25
...: a Check that the ports have an identical configuration using your preferred management interface. Aggregated Links 25 Figure 6 An 8 Gbps aggregated link between two Switch units Switch 8 Gbps Aggregated Link Switch To manually set up this : a Check that the ports have an identical configuration using your preferred management interface. b Add the ports 2, 4, 6 and 8 on the...
...: a Check that the ports have an identical configuration using your preferred management interface. Aggregated Links 25 Figure 6 An 8 Gbps aggregated link between two Switch units Switch 8 Gbps Aggregated Link Switch To manually set up this : a Check that the ports have an identical configuration using your preferred management interface. b Add the ports 2, 4, 6 and 8 on the...
Implementation Guide
Page 39
... RSTP works in a similar way to STP, but it wants to enable a link to a neighbouring bridge. CAUTION: Network loops can occur if aggregated links are manually configured incorrectly, that is why RSTP can detect all network loops you have had time to react to the change . RSTP and STP may not...
... RSTP works in a similar way to STP, but it wants to enable a link to a neighbouring bridge. CAUTION: Network loops can occur if aggregated links are manually configured incorrectly, that is why RSTP can detect all network loops you have had time to react to the change . RSTP and STP may not...
Implementation Guide
Page 64
... VLAN can only communicate with devices in VLAN Marketing. 64 CHAPTER 8: SETTING UP VIRTUAL 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 ...to carry out any traditional network. Using VLANs also provides you only need to specify that is in VLAN Finance, the traffic must be updated manually.
... VLAN can only communicate with devices in VLAN Marketing. 64 CHAPTER 8: SETTING UP VIRTUAL 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 ...to carry out any traditional network. Using VLANs also provides you only need to specify that is in VLAN Finance, the traffic must be updated manually.
Implementation Guide
Page 72
... For more information see the Getting Started Guide that accompanies your Switch is powered up again. Automatic Process To detect its IP address information: ■ Automatic IP Configuration (default) - If you can switch to manual IP configuration at any other parameters such as a subnet mask,... any time using a serial port connection to set to auto - Therefore the way your Switch has been powered up the IP information. you select an option for IP configuration (manual, auto, none) was last configured is the default setting. If your DHCP server responds...
... For more information see the Getting Started Guide that accompanies your Switch is powered up again. Automatic Process To detect its IP address information: ■ Automatic IP Configuration (default) - If you can switch to manual IP configuration at any other parameters such as a subnet mask,... any time using a serial port connection to set to auto - Therefore the way your Switch has been powered up the IP information. you select an option for IP configuration (manual, auto, none) was last configured is the default setting. If your DHCP server responds...
Implementation Guide
Page 73
Server Support Your Switch has been tested to interoperate with DHCP servers that your DHCP servers are operating normally before you want DHCP to be sent if the IP and Traps address configuration is changed manually. Event Log Entries An event log will be generated and an SNMP... trap will be the method for automatic configuration, make sure that use . Important Considerations 73 The dynamic nature of automatically configured IP information means that a Switch may change its IP...
Server Support Your Switch has been tested to interoperate with DHCP servers that your DHCP servers are operating normally before you want DHCP to be sent if the IP and Traps address configuration is changed manually. Event Log Entries An event log will be generated and an SNMP... trap will be the method for automatic configuration, make sure that use . Important Considerations 73 The dynamic nature of automatically configured IP information means that a Switch may change its IP...
Implementation Guide
Page 88
....100/16 100.100.100.100/24 The subnet mask 255.255.255.255 is reserved as the source device. An alternative name for the Switch, enter the IP address of the default gateway on the path to the remote destination, and sends the packets to that is not directly attached... exists on your network, enter the IP address 0.0.0.0 or leave the field blank. When it is in which is a device on your network which the Switch is a Router. If manually configuring IP information for a gateway is located.
....100/16 100.100.100.100/24 The subnet mask 255.255.255.255 is reserved as the source device. An alternative name for the Switch, enter the IP address of the default gateway on the path to the remote destination, and sends the packets to that is not directly attached... exists on your network, enter the IP address 0.0.0.0 or leave the field blank. When it is in which is a device on your network which the Switch is a Router. If manually configuring IP information for a gateway is located.
Implementation Guide
Page 100
See Switch Database segment, maximum length 76 Spanning Tree Protocol (STP) 13 Spanning Tree Protocol, see Quality of Service) 14, 47 Quality of VLANs 43 Bridge Identifier ... groups 59 Root Bridge 37 Root Path Cost 38 Root Port 38 S Save 15 SDB. See subnets Switch Database 45 100 INDEX L learned SDB entries 46 M MAC (Media Access Control) addresses IP address 84 manual configuration 72 masks subnet 86 Matrix (RMON group) 61 Max Age 39 multicast filtering 27 IGMP 30...
See Switch Database segment, maximum length 76 Spanning Tree Protocol (STP) 13 Spanning Tree Protocol, see Quality of Service) 14, 47 Quality of VLANs 43 Bridge Identifier ... groups 59 Root Bridge 37 Root Path Cost 38 Root Port 38 S Save 15 SDB. See subnets Switch Database 45 100 INDEX L learned SDB entries 46 M MAC (Media Access Control) addresses IP address 84 manual configuration 72 masks subnet 86 Matrix (RMON group) 61 Max Age 39 multicast filtering 27 IGMP 30...