D-Link DGS-1248T - Manual

2 INTRODUCTION This chapter describes the features of the DGS-1248T Web Smart 48-Port 10/100/1000Mbps Gigabit Switch and some background information about Ethernet/Fast Ethernet/Gigabit Ethernet switching technology. Gigabit Ethernet Technology Gigabit Ethernet is an extension of IEEE 802.3 Ethernet...

4 Switching LAN technology is a marked improvement over the previous generation of network bridges, which were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost of a router, the setup, and maintenance required make routers relatively impracti...

6 UNPACKING AND INSTALLATION This chapter provides unpacking and installation information for the Switch. Unpacking Open the shipping cartons of the Switch and carefully unpacks its contents. The carton should contain the following items: ‹ One DGS-1248T Web Smart 48-Port 10/100/1000Mbps Gigabit Swi...

7 When installing the Switch on a level surface, attach the rubber feet to the bottom of each device. The rubber feet cushion the hub and protect the hub case from scratching. Figure 1. Attach the adhesive rubber pads to the bottom Rack Mounting The Switch can be mounted in an EIA standard-size, 19-...

9 IDENTIFYING EXTERNAL COMPONENTS This chapter describes the front panel, rear panel, and LED indicators of the Switch. Front Panel The figure below shows the front panels of the Switch. 10/100/1000 Base-T Twisted-Pair Ports w/ LED Indicators ┌─────────────────────────────┐ └──┘ SFP(Mini GBIC) Ports...

10 Rear Panel Figure 5. Rear panel of the Switch AC Power Connector: This is a three-pronged connector that supports the power cord. Plug in the female connector of the provided power cord into this connector, and the male into a power outlet. Supported input voltages range from 100-240V AC at 50-60...

11 UNDERSTANDING LED INDICATORS The front panel LEDs provides instant status feedback, and helps monitor and troubleshoot when needed. Figure 6. LED indicators of the Switch Power and System LEDs POWER: System Power Indicator On : When the Power LED lights on, the Switch is receiving power. Off : Wh...

13 CONFIGURATION Through the Web Browser you can configure the Switch functions such as VLAN, Trunking, QoS… etc. With the attached Web Management Utility, you can easily discover all Web Managed Switches, assign the IP Address, change the password, and upgrade with new firmware. Installing the Web ...

14 Discovery List This is the list where you can discover all the Web managed devices in the entire network. By pressing the “Discovery” button, you can list all the Web Managed devices in the discovery list. Double click or press the “Add to monitor list” button to select a device from the Discover...

16 Device Setting You can set the device by using the function key in the Device Setting Dialog box. Configuration Setting: In this Configuration Setting, you can set the IP Address, Subnet Mask, Gateway, Set Trap to (Trap IP Address), System name, and Location. Select the device in the Discovery li...

17 Firmware Upgrade: When the device has a new function, there will be a new firmware to update the device; use this function to upgrade the firmware Figure 12. Web Access: Double click the device in the Monitor List or select a device in the Monitor List and press the “Web Access” button to access ...

18 In the “Option TAB” , there is the Refresh Time function. This function helps you to refresh the time for monitoring the device. Choose 15 secs , 30 secs , 1 min , 2 min , and 5 min to select the time for monitoring. In the “Help TAB” , there is About function, it will show out the version of the...

19 Or through the Web Management Utility, you do not need to remember the IP Address. Select the device shown in the Monitor List of the Web Management Utility to settle the device on the Web Browser. When the following dialog page appears, enter the default password "admin" and press Login ...

20 Setup Menu When the main page appears, find the Setup menu in the left side of the screen (Figure 16). Click on the setup item that you want to configure. There are fifteen options: Port Settings, VLAN Settings, Trunk Setting, Mirror Setting, QoS Setting, Spanning Tree Setting, SNMP Setting, Jumb...

21 Port Settings In the Port Settings menu (Figure 17), this page will display each port’s status. Press the ID parameter to set each port’s Speed, Flow Control, Default priority, and Link Status . When you need to renew the posted information, press the “Refresh” button. The Link Status in the scre...

22 To change the port setting, click on the ID parameter to enter the selected port to configure its Speed/Disable and Flow control. Figure 18. Port Setting Speed/Disable: This setting has six modes— 100M Full , 100M Half , 10M Full , 10M Half , Auto and Disable —for speed or port disable selections...

23 VID Table Setting: Select the VID group that you set. When you select VID Table Setting, press “Add new VID” to create new VID group, from port 01 ~ port 48, select Untag Port, Tag Port, or Not Member for each port. To save the VID group, press “Apply” button. To remove the selected VID group, se...

24 Port Egress Setting: The Port Egress is used to set the 802.1Q VLAN Egress rule in each port; the selected port will include the TCI (Tag Control Information) data packets. Figure 21. Port Egress Setting Trunk Setting The Trunk function enables the Switch to cascade two or more devices with large...

25 Mirror Setting Port Mirroring is a method of monitoring network traffic that forwards a copy of each incoming and/or outgoing packet from one port of a network switch to another port where the packet can be studied. It enables the manager to keep close track of switch performance and alter it if ...

26 Spanning Tree Setting This Switch supports the 802.1d Spanning Tree Protocol. Every segment will have a single path to the root bridge. All bridges listen for BPDU packets. However, BPDU packets are sent more frequently - with every Hello packet. BPDU packets are sent even if a BPDU packet was no...

27 STP Function: To selecting enable or disable STP function on the Switch. Bridge Priority: This value between 0 and 65535 to specify the priority for forwarding packets. The lower the value, the higher the priority. The default is 32768. Bridge Max Age: This value may be set to ensure that old inf...

28 SNMP Setting Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer) designed specifically for managing and monitoring network devices. SNMP enables network management stations to read and modify the settings of gateways, routers, switches, and other network devices. Use S...

29 MIBs Management and counter information are stored by the Switch in the Management Information Base (MIB). The Switch uses the standard MIB-II Management Information Base module. Consequently, values for MIB objects can be retrieved from any SNMP-based network management software. In addition to ...

30 Delete Group: To delete previously defined SNMP Community group, press “Delete Group” button, the Delete SNMP Community configuration window will pop out; checked the delete dialog box. Press “Apply” to delete the selected SNMP Community Group. Figure 27. Delete SNMP Community group Modify Group:...

31 Trap authentication fail: When checked the dialog box of the Trap authentication fail , when fail to authentication, the Switch will trap the authentication fail even to the SNMP host. Add Trap: To create a recipient of SNMP traps generated by the Switch’s SNMP agent, press “Add Trap” button, and...

32 Modify Trap: To modify previously defined SNMP Trap, click on the ID parameter to enter to the selected SNMP Trap to configure its community name, IP address and events. Press “Apply” to save change of the SNMP Trap. Figure 32. Modify SNMP Trap Jumbo Frame Setting To enable or disable the Jumbo F...

33 Device Status Click on the “Status” button to display the device status on this screen. It will display the System Status, Port Status, VLAN Status, Trunk Status, and Mirror Status. Press “Refresh” when you need to renew the posted information. Figure 35

34 Statistics The Statistics Menu screen will show the status of each port packet count. Figure 36 For detailed packet information, click on the ID parameter as in Figure 37.

36 System Setting The System Setting includes the System name, Location name, Login Timeout, IP Address, Subnet Mask, and Gateway. Through the Web Management Utility, you can easily recognize the device by using the System Name and the Location Name. The Login Timeout is to set the idle time-out for...

37 Trap Setting The Trap Setting enables the device to monitor the Trap through the Web Management Utility, set the Trap IP Address of the manager where the trap to be sent. Figure 39. Trap Setting System Events: Monitoring the system’s trap. Device Bootup: a trap when booting up the system. Illegal...

38 Password Setting Password is the invaluable tool for the manager to secure the Web Management Switch. You can use this function to change the password. If you forget the password, press the “Reset” button in the rear panel of the Switch. The current setting includes VLAN, Port Setting… etc. will ...

39 Reset Setting The Factory Reset button helps you to reset the device back to the default setting from the factory. Be aware that the entire configuration will be reset; the IP address of the device will be set to the default setting of 192.168.0.1. Figure 42. Reset Setting Logout When you select ...

40 TECHNICAL SPECIFICATIONS General Standards IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3ab 1000BASE-T Gigabit Ethernet IEEE 802.3x Full Duplex Flow Control IEEE 802.3z 1000BASE-SX/LX Gigabit Ethernet Protocol CSMA/CD Data Transfer Rate Ethernet: 10Mbps (half-duplex)...

41 Performance Transmits Method: Store-and-forward Filtering Address Table: 8K entries per device Packet Filtering/Forwarding Rate: 10Mbps Ethernet: 14,880/pps 100Mbps Fast Ethernet: 148,800/pps 1000Mbps Gigabit Ethernet: 1,488,000/pps MAC Address Learning: Automatic update Transmits Method: Store-a...

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