D-Link DES-3250TG - Manuals

D-Link DES-3250TG Standalone Layer 2 Switch Safety Instructions (continued) • To help prevent electric shock, plug the system and peripheral power cables into properly grounded electrical outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter pl...

D-Link DES-3250TG Standalone Layer 2 Switch Safety Instructions (continued) Always load the rack from the bottom up, and load the heaviest item in the rack first. Make sure that the rack is level and stable before extending a component from the rack. Use caution when pressing the component rail rele...

D-Link DES-3250TG Standalone Layer 2 Switch Section 1 Introduction Fast Ethernet Technology Gigabit Ethernet Technology Switch Stacking Performance Features Ports This section describes the functionality features of the DES-3250TG. Fast Ethernet Technology 100Mbps Fast Ethernet (or 100BASE-T) is a s...

D-Link DES-3250TG Standalone Layer 2 Switch Features The DES-3250TG Switch was designed for easy installation and high performance in an environment where traffic on the network and the number of users increase continuously. Switch features include: • Store and forward switching scheme. • Full and h...

D-Link DES-3250TG Standalone Layer 2 Switch panel modules can be used simultaneously, the ports must be different. For example, if port 49x is used on the Mini GBIC module, port 49x is not available on the 1000BASE-T module, and vice versa. • RS-232 DCE Diagnostic port (console port) for setting up ...

D-Link DES-3250TG Standalone Layer 2 Switch Section 2 Unpacking and Setup Unpacking Installation Power On This chapter provides unpacking and setup information for the Switch. Unpacking Open the shipping carton of the Switch and carefully unpack its contents. The carton should contain the following ...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 2-1. Installing rubber feet for desktop installation Rack Installation The DES-3250TG can be mounted in an EIA standard-sized, 19-inch rack, which can be placed in a wiring closet with other equipment. To install, attach the mounting brackets on the...

D-Link DES-3250TG Standalone Layer 2 Switch Power on The DES-3250TG switch can be used with AC power supply 100 - 240 VAC, 50 - 60 Hz. The power switch is located at the rear of the unit adjacent to the AC power connector and the system fan. The switch’s power supply will adjust to the local power s...

D-Link DES-3250TG Standalone Layer 2 Switch Section 3 Identifying External Components Front Panel Rear Panel Side Panels Gigabit Combo Ports LED Indicators This chapter describes the front panel, rear panel, side panels, and optional plug-in module, and LED indicators of the DES-3250TG. Front Panel ...

D-Link DES-3250TG Standalone Layer 2 Switch The AC power connector is a standard three-pronged connector that supports the power cord. Plug-in the female connector of the provided power cord into this socket, and the male side of the cord into a power outlet. Supported input voltages range from 100 ...

D-Link DES-3250TG Standalone Layer 2 Switch ● Power – This indicator on the front panel should be lit during the Power-On Self Test (POST). It will light green approximately 2 seconds after the switch is powered on to indicate the ready state of the device. ● Console – This indicator is lit green wh...

D-Link DES-3250TG Standalone Layer 2 Switch Section 4 Connecting the Switch Switch to End Node Switch to Hub or Switch 10BASE-T Device 100BASE-TX Device Stacking vs. Standalone Operation Managing Switch Stacks This chapter describes how to connect the DES-3250TG to your Ethernet/Fast Ethernet/Gigabi...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 4- 2. Switch connected to a port on a hub or switch using a straight or crossover cable 10BASE-T Device For a 10BASE-T device, the Switch’s LED indicators should display the following: ● Link/Act indicator is ON . 100BASE-TX Device For a 100BASE-TX ...

D-Link DES-3250TG Standalone Layer 2 Switch auto stacking mode, the master-slave relationships is determined automatically. For DES-3250TG Switch stacks, the unit with the lowest MAC address becomes the master (stack number 1). The order in which slave devices appear logically in the stack (stack nu...

D-Link DES-3250TG Standalone Layer 2 Switch Keep in mind the following important considerations for stacked Switch groups: All management of the Switches in the stack is done through the master Switch. • • The master Switch should be used to uplink to the Ethernet backbone. For DES-3250TG stacks, th...

D-Link DES-3250TG Standalone Layer 2 Switch Since we want to keep the same IP address and all the other settings on the standalone Switch, this Switch will become the master of the stack and Switch B will become the slave. To make sure Switch A functions as the master we will enable stacking and ove...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 4- 4. Add a Switch to a Stack Switch C is added to the existing stack where Switch A is the designated master. Power off all devices and securely place Switch C in the slot beneath Switch B. Adjust stacking cable connections so the OUT port on Switc...

D-Link DES-3250TG Standalone Layer 2 Switch Stacking with DGS-3312SR The DES-3250TG Release 4 Switch can be arranged in a star topology and managed as slave devices through the DGS-3312SR Master Switch. Up to twelve Switches can be connected to the DGS-3312SR Switch in this arrangement. Figure 4- 6....

D-Link DES-3250TG Standalone Layer 2 Switch Section 5 Introduction to Switch Management Management Options Web-based Management Interface SNMP-Based Management Managing User Accounts Command Line Console Interface through the Serial Port Connecting the Console Port (RS-232 DCE) First Time Connecting...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 5- 1. Initial screen after first connection First Time Connecting to The Switch The Switch supports user-based security that can allow you to prevent unauthorized users from accessing the Switch or changing its settings. This section tells how to lo...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 5- 2. Initial screen, first time connecting to the Switch Usernames and Passwords are not required on the initial screen after the first connection. Any additional user names and passwords must first be created by the administrator. You will be give...

D-Link DES-3250TG Standalone Layer 2 Switch After your initial login, define new passwords for both default user names to prevent unauthorized access to the Switch, and record the passwords for future reference. To create an administrator-level account for the Switch, do the following: At the CLI lo...

D-Link DES-3250TG Standalone Layer 2 Switch SNMP agent. SNMP defines both the format of the MIB specifications and the protocol used to access this information over the network. The DES-3250TG supports SNMP versions 1, 2c, and 3. You can specify which version of SNMP you want to use to monitor and c...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 5- 5. Show switch command The Switch's MAC address can also be found from the Web management program on the Switch Information (Basic Settings) window on the Configuration menu. The IP address for the Switch must be set before it can be managed with...

D-Link DES-3250TG Standalone Layer 2 Switch Connecting Devices to the Switch After you assign IP addresses to the Switch, you can connect devices to the Switch. To connect a device to an SFP transceiver port: Use your cabling requirements to select an appropriate SFP transceiver type. • • • Insert t...

D-Link DES-3250TG Standalone Layer 2 Switch Section 6 Web-based Switch Management Introduction Login to Web Manager User Accounts Management Admin and User Privileges Save Changes Areas of the User Interface Web Pages Introduction The DES-3250TG offers an embedded Web-based (HTML) interface allowing...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 6- 1. Login button This opens the management module’s main page. The switch management features available in the Web-based manager are explained below. User Accounts Management From the Management menu, click User Accounts and then the User Account ...

D-Link DES-3250TG Standalone Layer 2 Switch Network Monitoring Yes Read Only Community Strings and Trap Stations Yes Read Only Update Firmware and Configuration Files Yes Read Only System Utilities Yes Ping Only Factory Reset Yes No Reboot Switch Yes No User Account Management Add/Update/Delete User...

D-Link DES-3250TG Standalone Layer 2 Switch Once the switch configuration settings have been saved to NV-RAM, they become the default settings for the switch. These settings will be used every time the switch is rebooted. Areas of the User Interface The user interface provides access to various swit...

D-Link DES-3250TG Standalone Layer 2 Switch NOTICE : Any changes made to the Switch configuration during the current session must be saved in the Save Changes web menu (explained below) or use the command line interface (CLI) command save. Web Pages W hen you connect to the management mode of the Sw...

D-Link DES-3250TG Standalone Layer 2 Switch Section 7 Configuration IP Address Switch Information Advanced Settings Serial Port Settings MAC Notification Port Description Port Configuration Port Mirroring Stack Setting Static ARP Settings IGMP Spanning Tree Forwarding Filtering VLANs Port Bandwidth ...

D-Link DES-3250TG Standalone Layer 2 Switch IP Address The Switch needs to have an IP address assigned to it so that an In-Band network management system (for example, the Web Manager or Telnet) client can find it on the network. The IP Address Settings window allows you to change the settings for t...

D-Link DES-3250TG Standalone Layer 2 Switch switch’s ports. There are no entries in the Management Station IP Addresses table, by default − so any management station can access the switch. Admin. State This setting allows the IP interface named “System” to be enabled or disabled. Switch Information ...

D-Link DES-3250TG Standalone Layer 2 Switch Destination , or Mac Source . RMON Status < Disabled > To enable RMON capability, toggle Disabled to Enabled . 802.1x Status To enable 802.1x port control access on a global basis, toggle Disabled to Enabled . Asymetric VLAN < Disabled > To ena...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 5. MAC Notification window The following parameters can be configured. Parameters Description MAC Notification Enable or disable MAC notification globally on the Switch. The default setting is Disabled . MAC Notification Interval The user may set...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 6. Port Configuration window The From and To drop-down dialog boxes allow different ports to be selected for configuration. Use the State pull-down menu to either enable or disable the selected port. Use the Speed/Duplex pull-down menu to select ...

D-Link DES-3250TG Standalone Layer 2 Switch Please note that although the two front panel modules can be used simultaneously, the ports must be different. For example, if port 50x is used on the Mini GBIC module, port 50x is not available on the 1000BASE-T module. In addition, the fiber port will al...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 7. Port Description Settings window Use the From and To pull down menu to choose a port or range of ports to describe and Unit to choose the Switch in the switch stack, and then enter a description of the port(s). Click Apply to set the descripti...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 8. Setup Port Mirroring window The target port is where information will be duplicated and sent for capture and network analysis. A network analyzer would be attached to this port to capture packets duplicated from the source port. It should be n...

D-Link DES-3250TG Standalone Layer 2 Switch Target Port This port is where information will be duplicated and sent for capture and network analysis. Status Toggle between Enabled and Disabled . Stack Setting When DES-3250TG Switches are properly interconnected in a stacked group, information about t...

D-Link DES-3250TG Standalone Layer 2 Switch numerical value of their respective MAC addresses. Auto Switches in the stack will be assigned a unit ID using a comparison of the numerical value of the Switch’s MAC address. The lowest MAC address in the Switch stack will become Unit 1 (the Master Switch...

D-Link DES-3250TG Standalone Layer 2 Switch The user may globally set the maximum amount of time, in minutes, that an Address Resolution Protocol (ARP) entry can remain in the Switch’s ARP table, without being accessed, before it is dropped from the table. The value may be set in the range of 0-6553...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 13 . IGMP Snooping Settings window The following fields can be set: Parameter Description VLAN ID Allows the entry of the VLAN ID for which IGMP Snooping is to be configured. VLAN Name Allows the entry of the name of the VLAN for which IGMP Snoop...

D-Link DES-3250TG Standalone Layer 2 Switch group messages. The default is 1 second. Host Timeout (1-16711450) Specifies the maximum amount of time a host can be a member of a multicast group without the switch receiving a host membership report. The default is 260 seconds. Router Timeout (1-1671145...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 14. Current Static Router Ports Entries window To add a static router port configuration, click the pointer icon: Figure 7- 15. Static Router Ports Settings window The following fields are displayed: Parameter Description VID Displays the name of...

D-Link DES-3250TG Standalone Layer 2 Switch 802.1w Rapid Spanning Tree The Switch implements two versions of the Spanning Tree Protocol, the Rapid Spanning Tree Protocol (RSTP) as defined by the IEEE 802.1w specification and a version compatible with the IEEE 802.1d STP. RSTP can operate with legacy...

D-Link DES-3250TG Standalone Layer 2 Switch 802.1d/802.1w Compatibility RSTP can interoperate with legacy equipment and is capable of automatically adjusting BPDU packets to 802.1d format when necessary. However, any segment using 802.1 STP will not benefit from the rapid transition and rapid topolo...

D-Link DES-3250TG Standalone Layer 2 Switch Observe the following formulas when setting the above parameters: Max. Age ≤ 2 x (Forward Delay - 1 second) Max. Age ≥ 2 x (Hello Time + 1 second) STP Port Settings The Spanning Tree Protocol (STP) operates on two levels: on the switch level, the settings ...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 17. STP Port Settings window In addition to setting Spanning Tree parameters for use on the switch level, the switch allows for the configuration of a group of ports. This STP Group will use the switch-level parameters entered above, with the add...

D-Link DES-3250TG Standalone Layer 2 Switch Forwarding Filtering MAC addresses can be statically entered into the switch’s MAC Address Forwarding Table. These addresses will never age out. Unicast Forwarding To enter a MAC address into the switch’s forwarding table, click on the Forwarding Filtering...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 19. Static Multicast Forwarding Settings window To add a new multicast MAC address to the switch’s forwarding table, click the Add button: Figure 7- 20. Setup Static Multicast Forwarding Table window The following fields can be set: Parameter Des...

D-Link DES-3250TG Standalone Layer 2 Switch VLANs A VLAN is a collection of end nodes grouped by logic rather than physical location. End nodes that frequently communicate with each other are assigned to the same VLAN, regardless of where they are located physically on the network. Logically, a VLAN...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 23. Adding an IEEE 802.1Q Tag Static VLAN Entry The VLAN menu adds an entry to edit the VLAN definitions and to configure the port settings for IEEE 802.1Q VLAN support. Go to the Configuration menu, select the VLANs folder, and click Static VLAN...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 25. (Add) 802.1Q Static VLAN window To edit an existing 802.1Q VLAN, click the corresponding Modify button on the 802.1Q Static VLANs window. The following window will open: 58

D-Link DES-3250TG Standalone Layer 2 Switch is unchanged. None Allows an individual port to be specified as None. When an untagged packet is transmitted by the port, the packet header remains unchanged. When a tagged packet exits the port, the tag is stripped and the packet is changed to an untagged...

D-Link DES-3250TG Standalone Layer 2 Switch unaware device, the packet should be untagged. If the transmitting port is connected to a tag-aware device, the packet should be tagged. Tagging and Untagging Every port on an 802.1Q compliant switch can be configured as tagging or untagging. Ports with ta...

D-Link DES-3250TG Standalone Layer 2 Switch Parameter Description From and To Enter the desired ports in these two fields. PVID A Port VLAN Identifier is a classification mechanism that associates a port with a specific VLAN and is used to make forwarding decisions for untagged packets received by t...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 27. Bandwidth Settings window To use the bandwidth feature, enter the port or range of ports in the From and To fields. The third field allows you to set the type of packets being received and/or transmitted by the Switch. Toggle the no_limit set...

D-Link DES-3250TG Standalone Layer 2 Switch if you prefer, manually enter a value in the Rate field, and then click Apply . Please note that if no_limit is Enabled , the Switch will not permit you to set the bandwidth rate manually. SNTP Settings The DES-3250TG supports Simple Network Time Protocol ...

D-Link DES-3250TG Standalone Layer 2 Switch To complete SNTP configuration, fill in the desired values in the Current Time: Set Current Time section and then click Apply . Time Zone and DST To make time zone and Daylight Savings Time changes to the SNTP configuration, click SNTP Settings in the Conf...

D-Link DES-3250TG Standalone Layer 2 Switch Port Security Settings A given port’s (or a range of ports’) dynamic MAC address learning can be locked such that the current source MAC addresses entered into the MAC address forwarding table can not be changed once the port lock is enabled. The port can ...

D-Link DES-3250TG Standalone Layer 2 Switch group of ports on the switch for configuration. Admin State < Disabled > Allows the selected port(s) dynamic MAC address learning to be locked such that new source MAC addresses cannot be entered into the MAC address table for the locked port or grou...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 31. Port Security Clear window Delete Port_security Entries is used to delete individual entries. Enter the VLAN, MAC address, and port of the device that you want to delete from the port security entries table and click Delete . Clear Port_secur...

D-Link DES-3250TG Standalone Layer 2 Switch QOS (Quality of Service) The DES-3250TG switch supports 802.1p priority queuing. The switch has four priority queues. These priority queues are numbered from 0 — the lowest priority queue — to 3 — the highest priority queue. The eight priority queues speci...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 32. Traffic Control Setting window The following fields can be set: Parameter Description Group < 1 > Select the desired group of ports from the drop-down menu. Broadcast Storm < Disabled > This field can be toggled between Enabled an...

D-Link DES-3250TG Standalone Layer 2 Switch Lookup Fail packets. The counters are cleared every second. If the counter for a particular type of packet exceeds this threshold within one second, then further packets of that type will be dropped. 802.1p Default Priority The switch allows the assignment...

D-Link DES-3250TG Standalone Layer 2 Switch 802.1p User Priority The DES-3250TG allows the assignment of a Class of Traffic to each of the 802.1p priorities. Click 802.1p user_priority in the Q oS folder on the Configuration menu: Figure 7- 34. QoS Class of Traffic window Once you have assigned a ma...

D-Link DES-3250TG Standalone Layer 2 Switch Traffic Segmentation This window allows you to manage traffic segmentation on the switch. Click Traffic Segmentation in the QoS folder on the Configuration menu: Figure 7- 36. Traffic Segmentation Setting window 75

D-Link DES-3250TG Standalone Layer 2 Switch Enter a source port number in the first field and the range of the ports that you want to segment in the second field. For example, if you enter “5” in the first field and “5-8” in the second field, packets from port 5 will only be forwarded to ports 5 to ...

D-Link DES-3250TG Standalone Layer 2 Switch Link aggregation is most commonly used to link a bandwidth intensive network device or devices – such as a server – to the backbone of a network. The switch allows the creation of up to six link aggregation groups, each group consisting of up to eight link...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 39. Port Link Aggregation Settings (Add) window Figure 7- 40 . Port Link Aggregation Settings (Modify) window The following fields can be set: Parameter Description Group ID(1-6) Allows the entry of a number used to identify the link aggregation ...

D-Link DES-3250TG Standalone Layer 2 Switch existing entry. State < Disabled > This field can be toggled between Enabled and Disabled . This is used to turn a link aggregation group on or off. This is useful for diagnostics, to quickly isolate a bandwidth intensive network device, or to have a...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 41. Link Aggregation Settings window Enter the port range in the From and To fields, select the desired Mode in the next field, and then click Apply to let your changes take effect. Configuring the Access Profile Table Access profiles allow you t...

D-Link DES-3250TG Standalone Layer 2 Switch Creating an access profile is divided into two basic parts. The first is to specify which part or parts of a frame the Switch will examine, such as the MAC source address or the IP destination address. The second part is entering the criteria the Switch wi...

D-Link DES-3250TG Standalone Layer 2 Switch The following parameters can be set, for the Ethernet type: Parameter Description Profile ID (1-255) Type in a unique identifier number for this profile set. This value can be set from 1 - 255. Type Select profile based on Ethernet (MAC Address), IP addres...

D-Link DES-3250TG Standalone Layer 2 Switch header. Select IP to instruct the Switch to examine the IP address in each frame's header. Select Packet Content Mask to specify a mask to hide the content of the packet header. VLAN Selecting this option instructs the Switch to examine the VLAN part of ea...

D-Link DES-3250TG Standalone Layer 2 Switch (urgent), ack (acknowledgement), psh (push), rst (reset), syn (synchronize), fin (finish). src port mask - Specify a TCP port mask for the source port in hex form (hex 0x0-0xffff), which you wish to filter. dest port mask - Specify a TCP port mask for the ...

D-Link DES-3250TG Standalone Layer 2 Switch according to the requirements for the type of profile. Select Ethernet to instruct the Switch to examine the layer 2 part of each packet header. Select IP to instruct the Switch to examine the IP address in each frame's header. Select Packet Content Mask t...

D-Link DES-3250TG Standalone Layer 2 Switch Part 2 IP In the Configuration folder, click the Access Profile Table link opening the Access Profile Table . Under the heading Access Rule , clicking Modify , will open the following window. Figure 7- 46. Access Rule Table window (IP) To create a new rule...

D-Link DES-3250TG Standalone Layer 2 Switch VLAN Name Allows the entry of a name for a previously configured VLAN. Source IP Source IP Address - Enter an IP Address mask for the source IP address. Destination IP Destination IP Address- Enter an IP Address mask for the destination IP address. Dscp (0...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 49. Access Rule Table (Ethernet) To remove a previously created rule, select it and click the button. To add a new Access Rule, click the Add button: Figure 7- 50. Access Rule Configuration window (Ethernet) To set the Access Rule for Ethernet, a...

D-Link DES-3250TG Standalone Layer 2 Switch forwarded by the Switch, according to any additional rule added (see below). Select Deny to specify that packets that do not match the access profile are not forwarded by the Switch and will be filtered. Priority(0-7) This parameter is specified if you wan...

D-Link DES-3250TG Standalone Layer 2 Switch forwarded by the Switch, according to any additional rule added (see below). Access ID Type in a unique identifier number for this access. This value can be set from 1 - 50. Type Selected profile based on Ethernet (MAC Address), IP address or Packet Conten...

D-Link DES-3250TG Standalone Layer 2 Switch System Log Hosts Figure 7- 55. System Log Servers window Click Add to add an entry to the table in the window above. Figure 7- 56. System Log Server window Enter the desired system log server information and then click Apply to let your changes take effect...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 57. The EAPOL Packet Utilizing this method, unauthorized devices are restricted from connecting to a LAN through a port to which the user is connected. EAPOL packets are the only traffic that can be transmitted through the specific port until aut...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 59. The Authentication Server Authenticator The Authenticator (the Switch) is an intermediary between the Authentication Server and the Client. The Authenticator serves two purposes when utilizing 802.1x. The first purpose is to request certifica...

D-Link DES-3250TG Standalone Layer 2 Switch Client The Client is simply the endstation that wishes to gain access to the LAN or switch services. All endstations must be running software that is compliant with the 802.1x protocol. For users running Windows XP, that software is included within the ope...

D-Link DES-3250TG Standalone Layer 2 Switch Authentication Process Utilizing the three roles stated above, the 802.1x protocol provides a stable and secure way of authorizing and authenticating users attempting to access the network. Only EAPOL traffic is allowed to pass through the specified port b...

D-Link DES-3250TG Standalone Layer 2 Switch Port-Based Network Access Control … 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client Network access controlled port Network access uncontrolled port RADIUS Server Ethernet Switch ...

D-Link DES-3250TG Standalone Layer 2 Switch MAC-Based Network Access Control 802.1X Client Network access controlled port Network access uncontrolled port RADIUS Server Ethernet Switch 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802.1X Client 802...

D-Link DES-3250TG Standalone Layer 2 Switch SuppTimeout Select the time to wait for a response from a supplicant (user) for all EAP packets, except for the Request/Identity packets. ServerTimeout Select the length of time to wait for a response from a Radius server. MaxReq Select the maximum number ...

D-Link DES-3250TG Standalone Layer 2 Switch Initializing Ports for MAC Based 802.1x To initialize ports for the MAC side of 802.1x, the user must first enable MAC Based 802.1x in the Advanced Settings window. Click Configuration > Port Access Entity > PAE System Control > Initialize Port(s)...

D-Link DES-3250TG Standalone Layer 2 Switch Port The port number. MAC Address The MAC address of the Switch residing on the port. Auth State The Authenticator State will display one of the following: Initialize , Disconnected , Connecting , Authenticating , Authenticated , Aborting , Held , ForceAut...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 7- 72. Radius Server Authentication Setting window This window displays the following information: Parameter Description Succession < First > Choose the desired RADIUS server to configure: First , Second or Third . Radius Server < 0.0.0.0&g...

D-Link DES-3250TG Standalone Layer 2 Switch Section 8 Management A B C Security IP User Accounts SNMP V3 The DES-3250TG allows you to manage the switch via the Management menu. Security IP Some settings must be entered to allow the switch to be managed from an SNMP-based Network Management System su...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 8- 2. User Account Management window Click Add to add a user. Figure 8- 3. User Account Modify Table window 1. Enter the new user name, assign an initial password, and then confirm the new password. Determine whether the new user should have Admin o...

D-Link DES-3250TG Standalone Layer 2 Switch User Name Type in the new SNMP V3 user name or community string for V1 or V2. This can be any alphanumeric name of up to 32 characters that will identify the new SNMP user. Group Name Type in the new SNMP V3 group name. Again, this can be any alphanumeric ...

D-Link DES-3250TG Standalone Layer 2 Switch manager can access. SNMP Group Table The SNMP Group created with this table maps SNMP users (identified in the SNMP User Table) to the views created in the previous menu. Figure 8- 9. SNMP Group Table window To delete an existing entry, click the selection...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 8- 11. SNMP Group Table Display window The following parameters are used in the SNMP Group Table windows: Parameter Description Group Name Type an alphanumeric string of up to 32 characters. This is used to identify the new SNMP group of SNMP users....

D-Link DES-3250TG Standalone Layer 2 Switch SNMP manager. AuthNoPriv − Specifies that authorization will be required, but there will be no encryption of packets sent between the switch and a remote SNMP manager. AuthPriv − Specifies that authorization will be required, and that packets sent between ...

D-Link DES-3250TG Standalone Layer 2 Switch managers access to MIB objects in the switch’s SNMP agent. View Name Type an alphanumeric string of up to 32 characters that is used to identify the group of MIB objects that a remote SNMP manager is allowed to access on the switch. The view name must exis...

D-Link DES-3250TG Standalone Layer 2 Switch Parameter Description Host IP Address Type the IP address of the remote management station that will serve as the SNMP host for the switch. SNMP Version From the pull-down menu select: V1 – To specifies that SNMP version 1 will be used. V2c – To specify th...

D-Link DES-3250TG Standalone Layer 2 Switch Section 9 Monitoring CPU Utilization Port Utilization Packets Errors Size MAC Address ARP Table IGMP Snooping Group IGMP Snooping Forwarding VLAN Status Router Port Port Access Control The DES-3250TG provides extensive network monitoring capabilities that ...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 1 CPU Utilization window To select a port to view these statistics for, first select the Switch in the switch stack by using the Unit pull-down menu. To view the CPU utilization by port, use the real-time graphic of the Switch and/or switch stack...

D-Link DES-3250TG Standalone Layer 2 Switch Packets The Web Manager allows various packet statistics to be viewed as either a line graph or a table. Six windows are offered. Received (RX) Figure 9- 3. Rx Packets Analysis window (line graph for Bytes and Packets) 125

D-Link DES-3250TG Standalone Layer 2 Switch View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table. UMB-cast (RX) Figure 9- 5. Rx Packets Analysis window (line graph for Unicast, Multicast, and Broadcast Packets) 127

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 6. Rx Packets Analysis window (table for Unicast, Multicast, and Broadcast Packets) The following fields can be set: Parameter Description Time Interval [ 1s ] Select the desired setting between 1s and 60s , where “s” stands for seconds. The defa...

D-Link DES-3250TG Standalone Layer 2 Switch View Table Clicking this button instructs the Switch to display a table rather than a line graph. View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table. Transmitted (TX) Figure 9- 7. Tx Packets Analysis windo...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 8. Tx Packets Analysis window (table for Bytes and Packets) The following fields can be set: Parameter Description Time Interval [ 1s ] Select the desired setting between 1s and 60s , where “s” stands for seconds. The default value is one second....

D-Link DES-3250TG Standalone Layer 2 Switch View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table. Errors The Web Manager allows port error statistics compiled by the Switch’s management agent to be viewed as either a line graph or a table. Four window...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 10. Rx Error Analysis window (table) The following fields can be set: Parameter Description Time Interval [ 1s ] Select the desired setting between 1s and 60s , where “s” stands for seconds. The default value is one second. Record Number [ 200 ] ...

D-Link DES-3250TG Standalone Layer 2 Switch Jabber The number of frames with lengths more than the MAX_PKT_LEN bytes. Internally, MAX_PKT_LEN is equal to 1522. Drop The number of frames that are dropped by this port since the last Switch reboot. Show/Hide Check whether or not to display CrcError, Un...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 12. Tx Error Analysis window (table) The following fields can be set: Parameter Description Time Interval [ 1s ] Select the desired setting between 1s and 60s , where “s” stands for seconds. The default value is one second. Record Number [ 200 ] ...

D-Link DES-3250TG Standalone Layer 2 Switch View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table. Size Packet Size The Web Manager allows packets received by the Switch, arranged in six groups, to be viewed as either a line graph or a table. Two windo...

D-Link DES-3250TG Standalone Layer 2 Switch framing bits but including FCS octets). 512-1023 The total number of packets (including bad packets) received that were between 512 and 1023 octets in length inclusive (excluding framing bits but including FCS octets). 1024-1518 The total number of packets...

D-Link DES-3250TG Standalone Layer 2 Switch Port Enter a port number for the forwarding table to be browsed by. Find Allows the user to move to a sector of the database corresponding to a user defined port, VLAN, or MAC address. VID The VLAN ID of the VLAN the port is a member of. MAC Address The MA...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 16. ARP Table window To search a specific ARP entry, enter an interface name into the Interface Name or an IP address and click Find. IGMP Snooping Group This allows the switch’s IGMP Snooping table to be viewed. IGMP Snooping allows the switch t...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 17. IGMP Snooping Table window The following fields can be set or are displayed. Parameter Description Multicast Group The IP address of the multicast group. MAC Address The MAC address of the multicast group. Reports The total number of reports ...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 18. IGMP Snooping Forwarding Table window Enter the VLAN ID for the desired IGMP Snooping Forwarding Table and click Search . VLAN Status To view the VLAN Status, click VLAN Status on the Monitoring menu: Figure 9- 19. VLAN Status window 142

D-Link DES-3250TG Standalone Layer 2 Switch This read-only window displays information about the switch’s current VLAN configuration. Router Port This displays which of the switch’s ports are currently configured as router ports. A router port configured by a user (using the console or Web-based man...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 9- 21. Authenticator Status window 144

D-Link DES-3250TG Standalone Layer 2 Switch Section 10 Maintenance TFTP Services Switch History Ping Test Save Changes Reboot Services Logout TFTP Utilities Trivial File Transfer Protocol (TFTP) services allow the switch firmware to be upgraded by transferring a new firmware file from a TFTP server ...

D-Link DES-3250TG Standalone Layer 2 Switch Download Settings from TFTP Server To download a configuration file for the switch’s, click on the Maintenance folder and then the TFTP Services folder and finally click on the Download Settings from TFTP Server link: Figure 10- 2. Download Settings from T...

D-Link DES-3250TG Standalone Layer 2 Switch Enter the IP address of the TFTP server and the path and filename for the history log on the TFTP server. Click Start to initiate the file transfer. Switch History This allows the Switch History log to be viewed. The switch records all traps, in sequence, ...

D-Link DES-3250TG Standalone Layer 2 Switch Figure 10- 6. Ping Test window The Infinite times checkbox, in the Repeat Pinging for section, tells PING to keep sending data packets to the specified IP address until the program is stopped. Save Changes The DES-3250TG has two levels of memory, normal RA...

D-Link DES-3250TG Standalone Layer 2 Switch Reboot Figure 10- 8. Reboot window Reset Figure 10- 9. Reset window Reset System Figure 10- 10. Reset System window 149

D-Link DES-3250TG Standalone Layer 2 Switch Reset Config Figure 10- 11. Reset Config window Logout Figure 10- 12. Logout Web Setup window Click Apply if you want to logout of the Web configuration program and return to the main page. Appendix A Technical Specifications General Standards: IEEE 802.3 ...

D-Link DES-3250TG Standalone Layer 2 Switch General IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3z 1000BASE-SX Gigabit Ethernet IEEE 802.3ab 1000BASE-T Gigabit Ethernet IEEE 802.1 P/Q VLAN IEEE 802.3x Full-duplex Flow Control ANSI/IEEE 802.3 Nway auto-negotiation Protocols: CSMA/CD Data Transfer R...

D-Link DES-3250TG Standalone Layer 2 Switch Physical and Environmental Weight: 4.4 kg EMI: FCC Class A, CE Class A, C-Tick, VCCI Class A Safety: CSA International Performance Transmission Method: Store-and-forward RAM Buffer: 64M Bytes per device Filtering Address Table: 8K MAC address per device Pa...

D-Link DES-3250TG Standalone Layer 2 Switch Appendix B Understanding and Troubleshooting the Spanning Tree Protocol When the spanning-tree algorithm determines a port should be transitioned to the forwarding state, the following occurs: • The port is put into the listening state where it receives BP...

Listening State The listening state is the first transition for a port from the blocking state. Listening is an opportunity for the switch to receive BPDUs that may tell the switch that the port should not continue to transition to the forwarding state, but should return to the blocking state (that ...

D-Link DES-3250TG Standalone Layer 2 Switch Learning State A port in the learning state prepares to participate in frame forwarding. The port enters the learning state from the listening state. A port in the learning state does the following: • Discards frames received from the network segment to wh...

Forwarding State A port in the forwarding state forwards packets. The port enters the forwarding state from the learning state when the forward delay timer expires. A port in the forwarding state does the following: • Forwards packets received from the network segment to which it is attached. • Forw...

D-Link DES-3250TG Standalone Layer 2 Switch Disabled State A port in the disabled state does not participate in frame forwarding or STP. A port in the disabled state is virtually non-operational. A disabled port does the following: • Discards packets received from the network segment to which it is ...

D-Link DES-3250TG Standalone Layer 2 Switch In this example, B has been elected as the designated bridge and port 2 on C is in the blocking state. The election of B as the designated bridge is determined by the exchange of BPDUs between B and C. B had a better BPDU than C. B continues sending BPDUs ...

Warranty and Registration FCC Warning This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a com...

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