Page 3 - Notice; NOTICE
Notice 9033645-01 i NOTICE Enterasys Networks reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Enterasys Networks to determine whether any such changes have been made. The hardware, firm...
Page 5 - TABLE OF CONTENTS
9033645-01 Table of Contents iii TABLE OF CONTENTS 1. MANAGEMENT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Required Connections . . . . . . . . . . . . . ...
Page 7 - INDEX
9033645-01 Table of Contents v Remapping Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 APPENDIX B. VIRTUAL LANS (VLANS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 VLANs and Frame Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9...
Page 9 - MANAGEMENT OVERVIEW; Configuration Options
9033645-01 Management Overview 1 1. MANAGEMENT OVERVIEW Configuration Options For advanced management capability, the VH-SMGMT Vertical Horizon Management Module provides a menu-driven system configuration program. This program can be accessed by a direct or modem connection to the serial port on th...
Page 10 - Remote Management via the Console Port; Configure the Switch Site; end and a 25-pin connector on the other end. Set the modem at the; Configure the Remote Site; gateway using an out-of-band connection or the BootP protocol.; Telnet Connection; mask, and default gateway using an out-of-band connection or BootP
2 Management Overview VH-2402S When attaching to a PC, set terminal emulation type to VT100, specify the port used by your PC (i.e., COM 1~4), and then set communications to 8 data bits, 1 stop bit, no parity, and 19200 bps (for initial configuration). Also be sure to set flow control to “none.” (Re...
Page 11 - In-Band Network Connection
9033645-01 Management Overview 3 In-Band Network Connection The on-board configuration program can be accessed using Telnet from any computer attached to the network. The switch and stack can also be managed by any computer using a Web browser (Internet Explorer 4.0 or above, or Netscape Navigator 4...
Page 13 - Overview; information is divided into the following parts:
9033645-01 VH-2402S User Interface 5 2. VH-2402S USER INTERFACE Overview Access is gained to the console menus by connecting a terminal to the console port (with a direct cable connection or over modems), or using Telnet to access the Management Module over the network. These menus allow you to reco...
Page 14 - User Access
6 VH-2402S User Interface VH-2402S User Access Once a direct connection to the serial port or a Telnet connection is established, the login screen for the on-board configuration program appears . You may need to press Enter a few times to display the screen. The default user names are “admin” and “g...
Page 15 - Factory Defaults; Parameter
9033645-01 VH-2402S User Interface 7 Factory Defaults Table 2-1 lists the default settings for switch configuration parameters. Each parameter can be changed via the console menus or Telnet. Table 2-1. Factory Default Settings Parameter Default Value Multicast Filtering GMRP Disabled IGMP Multicast ...
Page 17 - describes the Main Menu; Selection
9033645-01 VH-2402S User Interface 9 Main Menu The Main Menu is the first screen seen after successfully logging into the system. Figure 2-2 shows the Main Menu and the accompanying table describes the Main Menu . Figure 2-2. Main Menu Vertical Horizon Local Management -- VH-2402S Main Menu System I...
Page 20 - Displaying System Information
12 VH-2402S User Interface VH-2402S Displaying System Information Use the System Information screen to display descriptive information about the switch, or for quick system identification as shown in the following figure and table. Figure 2-4. System Information Vertical Horizon Local Management -- ...
Page 21 - Displaying Switch Version and Module Information
9033645-01 VH-2402S User Interface 13 Displaying Switch Version and Module Information Use the Switch Information screen to display hardware/firmware version numbers for the main board and agent module, as well as the power status and modules plugged into the system. Figure 2-5. Switch Information V...
Page 22 - described in the following sections.
14 VH-2402S User Interface VH-2402S Management Setup Menu After initially logging onto the system, adjust the communication parameters for your console to ensure a reliable connection (Serial Port Configuration). Specify the IP addresses for the agent module (Network Configuration / IP Configuration...
Page 23 - Changing the Network Configuration; screen shown below is described in the following table.
9033645-01 VH-2402S User Interface 15 Changing the Network Configuration Use the Network Configuration menu to set the bootup option, configure the switch’s Internet Protocol (IP) parameters, enable the on-board Web Agent, or to set the number of concurrent Telnet sessions allowed. The screen shown ...
Page 24 - IP Configuration
16 VH-2402S User Interface VH-2402S IP Configuration Use the IP Configuration screen to set the bootup option, or configure the switch’s IP parameters. The screen shown below is described in the following table. Figure 2-8. IP Configuration Vertical Horizon Local Management -- VH-2402S Network Confi...
Page 26 - HTTP Configuration
18 VH-2402S User Interface VH-2402S HTTP Configuration Use the HTTP Configuration screen to enable/disable the on-board Web agent, and to specify the TCP port that will provide HTTP service. The screen shown below is described in the following table. Figure 2-10. HTTP Configuration Vertical Horizon ...
Page 27 - Configuring the Serial Port
9033645-01 VH-2402S User Interface 19 Configuring the Serial Port You can access the on-board configuration program by attaching a VT100 compatible device to the switch’s serial port. (For more information on connecting to this port, see “Required Connections” on page 1.) The communication parameter...
Page 28 - Assigning SNMP Parameters
20 VH-2402S User Interface VH-2402S Assigning SNMP Parameters Use the SNMP Configuration screen to display and modify parameters for the Simple Network Management Protocol (SNMP). The switch includes an on-board SNMP agent which monitors the status of its hardware, as well as the traffic passing thr...
Page 29 - Configuring Community Names; strings authorized for management access. Up to 5 community names
9033645-01 VH-2402S User Interface 21 Configuring Community Names The following figure and table describe how to configure the community strings authorized for management access. Up to 5 community names may be entered. Figure 2-13. SNMP Communities Vertical Horizon Local Management -- VH-2402S SNMP ...
Page 30 - Configuring IP Trap Managers; messages from the switch. Up to 5 trap managers may be entered.
22 VH-2402S User Interface VH-2402S Configuring IP Trap Managers The following figure and table describe how to specify management stations that will receive authentication failure messages or other trap messages from the switch. Up to 5 trap managers may be entered. Figure 2-14. IP Trap Managers Ve...
Page 31 - a user name and password to the default Administrator as soon as; Figure 2-15. Console Login Configuration
9033645-01 VH-2402S User Interface 23 Console Login Configuration Use the Management Setup: Console Login Configuration to restrict management access based on specified user names and passwords, or to set the invalid password threshold and timeout. There are only two user types defined, ADMIN (Admin...
Page 32 - Downloading System Software; Using TFTP Protocol to Download Over the Network; the agent will not accept it. The success of the download operation
24 VH-2402S User Interface VH-2402S Downloading System Software Using TFTP Protocol to Download Over the Network Use the TFTP Download menu to load software updates into the switch. The download file should be an VH-2402S file from Enterasys; otherwise the agent will not accept it. The success of th...
Page 33 - Saving the System Configuration; Use the Configuration Save & Restore menu to save the switch
9033645-01 VH-2402S User Interface 25 Saving the System Configuration Use the Configuration Save & Restore menu to save the switch configuration settings to a file on a TFTP server. The file can be later downloaded to the switch to restore the switch’s settings. The success of the operation depe...
Page 34 - Configuring Management Access; Use the Management Configuration menu to define which VLAN has
26 VH-2402S User Interface VH-2402S Configuring Management Access Use the Management Configuration menu to define which VLAN has management access to the switch. Parameters shown on this screen are indicated in the following figure and table. Figure 2-18. Management Configuration Vertical Horizon Lo...
Page 35 - Configuring the Switch
9033645-01 VH-2402S User Interface 27 Configuring the Switch The Device Control menu is used to control a broad range of functions, including port configuration, Spanning Tree support for redundant switches, port mirroring, multicast filtering, and Virtual LANs. Each of the setup screens provided by...
Page 36 - * Not implemented in the current firmware release.
28 VH-2402S User Interface VH-2402S 802.1Q VLAN Base Information Displays basic VLAN information, such as VLAN version number and maximum VLANs supported. 802.1Q VLAN Current Table Information Displays VLAN groups and port members. 802.1Q VLAN Static Table Configuration Configures VLAN groups via st...
Page 37 - Configuring Port Parameters; Use the Port Configuration menus to set or display communication
9033645-01 VH-2402S User Interface 29 Configuring Port Parameters Use the Port Configuration menus to set or display communication parameters for any port or module on the switch. Figure 2-20. Port Configuration Vertical Horizon Local Management -- VH-2402S Port Configuration : Unit 1 Port 1-12 Port...
Page 38 - Viewing the Current Port Configuration
30 VH-2402S User Interface VH-2402S Viewing the Current Port Configuration The Port Information screen displays the port type, status, link state, and flow control in use, as well as the communication speed and duplex mode. To change any of the port settings, use the Port Configuration menu. The par...
Page 39 - Using the Spanning Tree Algorithm; A, “Spanning Tree Concepts” on page 85.; Figure 2-22. Spanning Tree Configuration
9033645-01 VH-2402S User Interface 31 Using the Spanning Tree Algorithm The Spanning Tree Algorithm can be used to detect and disable network loops, and to provide backup links between switches, bridges or routers. This allows the switch to interact with other bridging devices (that is, an STA-compl...
Page 41 - Configuring STA for Ports or Modules; modules. (Note that the Spanning Tree Configuration screen for the; Figure 2-24. Spanning Tree Port Configuration
9033645-01 VH-2402S User Interface 33 Configuring STA for Ports or Modules The following figure and table describe STA configuration for ports or modules. (Note that the Spanning Tree Configuration screen for the expansion slots also indicates module type.) Figure 2-24. Spanning Tree Port Configurat...
Page 42 - Viewing the Current Spanning Tree Configuration
34 VH-2402S User Interface VH-2402S Viewing the Current Spanning Tree Configuration The Spanning Tree Information screen displays a summary of the STA information for the overall bridge or for a specific port or module. To make any changes to the parameters for the Spanning Tree, use the Spanning Tr...
Page 43 - Displaying the Current Bridge STA; current Bridge STA Information.
9033645-01 VH-2402S User Interface 35 Displaying the Current Bridge STA The parameters shown in the following figure and table describe the current Bridge STA Information. Figure 2-26. Bridge STA Information Vertical Horizon Local Management -- VH-2402S Spanning Tree Information : Bridge STA Informa...
Page 46 - Using a Mirror Port for Analysis; drop its operating speed to match that of the target port.
38 VH-2402S User Interface VH-2402S Using a Mirror Port for Analysis You can mirror traffic from any source port to a target port for real-time analysis. You can then attach a logic analyzer or RMON probe to the target port and study the traffic crossing the source port in a completely unobtrusive m...
Page 47 - Configuring Port Trunks
9033645-01 VH-2402S User Interface 39 Configuring Port Trunks Port trunks can be used to increase the bandwidth of a network connection or to ensure fault recovery. You can configure up five trunk connections (combining 2~4 ports into a fat pipe) between any two standalone VH-2402S switches, or up t...
Page 48 - Figure 2-29. Port Trunking Configuration; Group 1
40 VH-2402S User Interface VH-2402S You can use the Port Trunking Configuration screen set up port trunks as shown below: Figure 2-29. Port Trunking Configuration The RJ-45 ports used for each trunk must all be on the same internal switch chip. The port groups permitted include: Group 1 Group 2 Grou...
Page 49 - IGMP Multicast Filtering
9033645-01 VH-2402S User Interface 41 IGMP Multicast Filtering Multicasting is used to support real-time applications such as video conferencing or streaming audio. A multicast server does not have to establish a separate connection with each client. It merely broadcasts its service to the network, ...
Page 50 - Configuring IGMP; Note: The default values are indicated in the sample screen.
42 VH-2402S User Interface VH-2402S Configuring IGMP This protocol allows a host to inform its local switch/router that it wants to receive transmissions addressed to a specific multicast group. You can use the IGMP Configuration screen to configure multicast filtering shown below: Figure 2-30. IGMP...
Page 51 - Configuring Broadcast Storm Control; Use the Broadcast Storm Control Configuration screen to enable; Figure 2-31. Broadcast Storm Control Configuration
9033645-01 VH-2402S User Interface 43 Configuring Broadcast Storm Control Use the Broadcast Storm Control Configuration screen to enable broadcast storm control for any port on the switch, as shown below: Figure 2-31. Broadcast Storm Control Configuration Vertical Horizon Local Management -- VH-2402...
Page 52 - Configuring Bridge MIB Extensions; Figure 2-32. Extended Bridge Configuration
44 VH-2402S User Interface VH-2402S Configuring Bridge MIB Extensions The Bridge MIB includes extensions for managed devices that support Traffic Classes, Multicast Filtering and Virtual LANs. To configure these extensions, use the Extended Bridge Configuration screen as shown below: Figure 2-32. Ex...
Page 54 - Configuring Traffic Classes
46 VH-2402S User Interface VH-2402S Configuring Traffic Classes IEEE 802.1p defines up to 8 separate traffic classes. This switch supports Quality of Service (QoS) by using two priority queues, with weighted fair queuing for each port. You can use the 802.1P Configuration menu to configure the defau...
Page 55 - Port Priority Configuration; for any port as shown below:
9033645-01 VH-2402S User Interface 47 Port Priority Configuration The default priority for all ingress ports is zero. Therefore, any inbound frames that do not have priority tags will be placed in the low priority output queue. Default priority is only used to determine the output queue for the curr...
Page 56 - P Port Traffic Class Information
48 VH-2402S User Interface VH-2402S 802.1P Port Traffic Class Information This switch provides two priority levels with weighted fair queuing for port egress. This means that any frames with a default or user priority from 0~3 are sent to the low priority queue “0” while those from 4~7 are sent to t...
Page 57 - Configuring Virtual LANs; You can use the VLAN configuration menu to assign any port on the; Q VLAN Base Information
9033645-01 VH-2402S User Interface 49 Configuring Virtual LANs You can use the VLAN configuration menu to assign any port on the switch to any of up to 256 LAN groups. In conventional networks with routers, broadcast traffic is split up into separate domains. Switches do not inherently support broad...
Page 58 - Q VLAN Current Table Information; you can assign ports to the same untagged VLAN (page 53). The current
50 VH-2402S User Interface VH-2402S 802.1Q VLAN Current Table Information This screen shows the current port members of each VLAN and whether or not the port supports VLAN tagging. Ports assigned to a large VLAN group that crosses several switches should use VLAN tagging. However, if you just want t...
Page 59 - Q VLAN Static Table Configuration; Use this screen to create a new VLAN or modify the settings for an
9033645-01 VH-2402S User Interface 51 802.1Q VLAN Static Table Configuration Use this screen to create a new VLAN or modify the settings for an existing VLAN. You can add/delete port members for a VLAN from any unit in the stack, or prevent a port from being automatically added to a VLAN via the GVR...
Page 62 - Figure 2-41. Multicast Router Port Information
54 VH-2402S User Interface VH-2402S Multicast Router Port Information You can use the Multicast Router Port Information screen to display the ports on this switch attached to a neighboring multicast router/switch for each VLAN ID. Figure 2-41. Multicast Router Port Information Vertical Horizon Local...
Page 63 - Figure 2-42. Static Multicast Router Port Configuration
9033645-01 VH-2402S User Interface 55 Static Multicast Router Port Configuration You can use the Static Multicast Router Port Configuration screen to assign ports that are attached to a neighboring multicast router/switch. Figure 2-42. Static Multicast Router Port Configuration Vertical Horizon Loca...
Page 64 - Figure 2-43. IGMP Member Port Configuration
56 VH-2402S User Interface VH-2402S IGMP Member Port Configuration You can use the IGMP Member Port Configuration screen to assign ports that are attached to hosts who want to receive a specific multicast service. Figure 2-43. IGMP Member Port Configuration Vertical Horizon Local Management -- VH-24...
Page 65 - network through that port.; Figure 2-44. Port Security Configuration
9033645-01 VH-2402S User Interface 57 Port Security Configuration Use the Port Security Configuration screen to enable and configure port security for the switch. Port Security allows you to configure each port with a list of MAC addresses of devices that are authorized to access the network through...
Page 66 - Monitoring the Switch
58 VH-2402S User Interface VH-2402S Monitoring the Switch The Network Monitor Menu provides access to port statistics, RMON statistics, IP multicast addresses, and the static (unicast) address table. Each of the screens provided by these menus is described in the following sections. Figure 2-45. Net...
Page 67 - Displaying Port Statistics; have been accumulated since the last system reboot.
9033645-01 VH-2402S User Interface 59 Displaying Port Statistics Port Statistics display key statistics from the Ethernet-like MIB for each port. Error statistics on the traffic passing through each port are displayed. This information can be used to identify potential problems with the switch (such...
Page 68 - Displaying RMON Statistics
60 VH-2402S User Interface VH-2402S Displaying RMON Statistics Use the RMON Statistics screen to display key statistics for each port or media module from RMON group 1. (RMON groups 2, 3 and 9 can only be accessed using SNMP management software.) The following screen displays the overall statistics ...
Page 70 - Displaying the Unicast Address Table; The Address Table contains the MAC addresses and VLAN identifier
62 VH-2402S User Interface VH-2402S Displaying the Unicast Address Table The Address Table contains the MAC addresses and VLAN identifier associated with each port (that is, the source port associated with the address and VLAN), sorted by MAC address or VLAN ID. You can search for a specific address...
Page 71 - Displaying the IP Multicast Registration Table; Figure 2-49. IP Multicast Registration Table
9033645-01 VH-2402S User Interface 63 Displaying the IP Multicast Registration Table Use the IP Multicast Registration Table to display all the multicast groups active on this switch, including multicast IP addresses and the corresponding VLAN ID. Figure 2-49. IP Multicast Registration Table Vertica...
Page 72 - Configuring Static Unicast Addresses; port as shown below.; Figure 2-50. Static Unicast Addreeess Table Configuration
64 VH-2402S User Interface VH-2402S Configuring Static Unicast Addresses Use the Static Unicast Address Table Configuration screen to manually configure host MAC addresses in the unicast table. You can use this screen to associate a MAC address with a specific VLAN ID and switch port as shown below....
Page 73 - Resetting the System; following figure and table.; Logging Off the System; Use the Exit command under the Main Menu to exit the configuration
9033645-01 VH-2402S User Interface 65 Resetting the System Select the System Restart Menu under the Main Menu to reset the management agent. The reset screen includes options as shown in the following figure and table. Figure 2-51. System Restart Menu Logging Off the System Use the Exit command unde...
Page 75 - Common Tasks
9033645-01 Configuring & Monitoring the Switch 67 3. CONFIGURING & MONITORING THE SWITCH Common Tasks The switch console menus allow you to modify default switch settings and configure the switch for network management. They also allow you to monitor switch performance and status. See Sectio...
Page 76 - Setting Password Protection
68 Configuring & Monitoring the Switch VH-2402S Setting Password Protection The VH-2402S switch is factory-configured with administrator access rights to the console menus set to READ/WRITE. This setting allows anyone to use the console menus to modify any operational parameter. To protect the c...
Page 77 - Assigning an IP Address
9033645-01 Configuring & Monitoring the Switch 69 Assigning an IP Address To assign an IP address to the switch, do the following: 1. Select Management Setup Menu from the Main menu. 2. Select Network Configuration and then IP Configuration. 3. Highlight the IP address field and enter the IP add...
Page 78 - Setting SNMP Management Access
70 Configuring & Monitoring the Switch VH-2402S Setting SNMP Management Access Access to the VH-2402S switch through SNMP is controlled by community names. The community names set for the switch must match those used by the SNMP management station for successful communication to occur. Access fo...
Page 79 - Configuring Port Mirroring
9033645-01 Configuring & Monitoring the Switch 71 Configuring Port Mirroring You can mirror the traffic being switched on any port for the purposes of network traffic analysis and connection assurance. When Port Mirroring is enabled, one port becomes a monitor port for any other port within the ...
Page 80 - Downloading Via the Serial Port; Your Selection: Runtime Code; Downloading Via TFTP
72 Configuring & Monitoring the Switch VH-2402S Downloading Via the Serial Port A serial download is the easiest method to upgrade the VH-2402S switch software, requiring the least amount of equipment and configuration. To download switch software via the serial port, do the following: 1. With t...
Page 82 - Configuring Spanning Tree Parameters
74 Configuring & Monitoring the Switch VH-2402S Configuring Spanning Tree Parameters The VH-2402S switch supports the IEEE 802.1D Spanning Tree Protocol. This protocol allows redundant connections to be created between LAN segments for purposes of fault tolerance. Two or more physical paths betw...
Page 83 - Configuring VLANs
9033645-01 Configuring & Monitoring the Switch 75 Configuring VLANs A virtual LAN (VLAN) is a group of devices on one or more LANs that are configured such that they can communicate as if they were attached to the same wire. Because VLANs are based on logical instead of physical connections, the...
Page 84 - Configuring Port Operation
76 Configuring & Monitoring the Switch VH-2402S Configuring Port Operation You can configure switch ports for operational parameters such as auto-negotiation, duplex mode, port speed and flow control. The 100Base-FX fiber ports always operate in full duplex mode and 100Mbps speed. Therefore, the...
Page 85 - Configuring the Unicast Address Table
9033645-01 Configuring & Monitoring the Switch 77 Configuring the Unicast Address Table The Unicast Address Table allows you to designate forwarding treatment through the switch for specific MAC addresses, allowing you to maintain the efficiency and security of your network. You can search for a...
Page 86 - Setting a Default Gateway
78 Configuring & Monitoring the Switch VH-2402S Setting a Default Gateway The default Gateway parameter defines the IP address of a router or other network device to which IP packets are to be sent if destined for a subnet outside of that which the switch is operating. To set a default gateway, ...
Page 89 - The SNMP Protocol; SNMP (Simple Network Management Protocol) is a communication; SNMP Management Workstation; access this information.
9033645-01 SNMP Management 81 4. SNMP MANAGEMENT The SNMP Protocol SNMP (Simple Network Management Protocol) is a communication protocol designed specifically for the purpose of managing devices or other elements on a network. Network equipment commonly managed with SNMP includes hubs, switches, rou...
Page 90 - MIB Objects
82 SNMP Management VH-2402S There are three main operations defined in SNMP: • GET operations read information from the managed device, such as those used to obtain status or statistical data. • SET operations change a functional parameter on the device, such as those used to configure Port Speed or...
Page 92 - Enterasys Proprietary MIB Extensions; Compiling MIB Extensions: Enterasys Website
84 SNMP Management VH-2402S RFC 1757 (RMON MIB) RFC 1757 is a group defined under MIB-II. This MIB provides management for the RMON aspects of the switch. The VH-2402S switch supports four of the nine groups of RMON defined for Ethernet networks on a per port basis. IEEE 802.1Q (Q-MIB) This MIB incl...
Page 93 - APPENDIX A. SPANNING TREE CONCEPTS; General
9033645-01 Spanning Tree Concepts 85 APPENDIX A. SPANNING TREE CONCEPTS General The IEEE 802.1D Spanning Tree Protocol resolves the problems of physical loops in a network by establishing one primary path between any two switches in a network. Any duplicate paths are barred from use and become stand...
Page 94 - Spanning Tree Protocol in a Network
86 Spanning Tree Concepts VH-2402S Spanning Tree Protocol in a Network Figure A-1 illustrates the use of three VH-2402S switches to establish an effective Spanning Tree configuration. Switches A, B and C are connected together in a redundant topology (more than one path between two points). If the c...
Page 95 - Spanning Tree Protocol Parameters; VH-2402S switch default settings for each parameter.; Table A-1. Spanning Tree Protocol Defaults
9033645-01 Spanning Tree Concepts 87 Spanning Tree Protocol Parameters Several configuration parameters control the operation of the Spanning Tree Protocol. Table A-1 describes the parameters and lists the VH-2402S switch default settings for each parameter. Table A-1. Spanning Tree Protocol Default...
Page 96 - Spanning Tree Protocol Operation; Communicating Between Bridges
88 Spanning Tree Concepts VH-2402S Spanning Tree Protocol Operation When the Spanning Tree Protocol is enabled for the first time or when there is a change in the network topology, such as a failure or the addition or removal of a component, the Spanning Tree Protocol automatically sets up the activ...
Page 99 - VLANs and Frame Tagging
9033645-01 Virtual LANs (VLANs) 91 APPENDIX B. VIRTUAL LANS (VLANS) VLANs and Frame Tagging The VH-2402S switch supports IEEE 802.1Q-compliant virtual LANs (VLANs). This capability provides a highly efficient architecture for establishing VLANs within a network and for controlling broadcast/ multica...
Page 100 - VH-2402S VLAN Configuration; Assigning Ports to VLANs; VLAN Classification
VH-2402S VLAN Configuration VLAN operation on the VH-2402S is enabled by default. Therefore, all frames are transferred internally through the switch with a VLAN tag. This tag may already be on the frame entering the switch, or added to the frame by the switch. VLAN information already existing on f...
Page 101 - Forwarding Tagged/Untagged Frames; To forward a frame from a VLAN-aware device to a VLAN-unaware; Automatic VLAN Registration; network adapter) supports the IEEE 802.1Q VLAN standard, it can be
9033645-01 Virtual LANs (VLANs) 93 Forwarding Tagged/Untagged Frames Ports can be assigned to multiple tagged or untagged VLANs. Each port on the switch is therefore capable of passing tagged or untagged frames. To forward a frame from a VLAN-aware device to a VLAN-unaware device, the switch first d...
Page 102 - Forwarding Traffic with Unknown VLAN Tags; This switch only supports 256 VLANs with VLAN IDs ranging from 1 to
94 Virtual LANs (VLANs) VH-2402S Forwarding Traffic with Unknown VLAN Tags This switch only supports 256 VLANs with VLAN IDs ranging from 1 to 2048, but the IEEE 802.1Q VLAN standard allows for VLAN IDs from 1 to 4094. Therefore, if this switch is attached to endstations that issue VLAN registration...
Page 103 - APPENDIX C. CLASS OF SERVICE; mechanism. Class of Service is based on the IEEE 802.1p standard
9033645-01 Class of Service 95 APPENDIX C. CLASS OF SERVICE Class of Service support on the VH-2402S allows you to assign mission-critical data a higher priority through the switch by delaying less critical traffic during periods of congestion. Higher priority traffic through the switch is serviced ...
Page 105 - APPENDIX D. IP MULTICAST FILTERING; IGMP Snooping and IP Multicast Filtering
9033645-01 IP Multicast Filtering 97 APPENDIX D. IP MULTICAST FILTERING IGMP Snooping and IP Multicast Filtering The Internet Group Management Protocol (IGMP) runs between hosts and their immediately neighboring multicast router/switch. The protocol’s mechanisms allow a host to inform its local rout...
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