Page 3 - Contents; Introduction
Contents 3 Contents 1 Introduction System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8 1-Gigabit Ethernet Ports . . . . . . . . . . . . . . . . . . . . . . . 7 16 1-Gigabit Ethernet Ports . . . . . . . . . . . . . . . . . . . . . . 8 24 1-Gigabit Ethernet Ports + 2 SFP Com...
Page 7 - Introduction; System Description; 1-Gigabit Ethernet Ports
7 1 Introduction This User’s Guide contains the information needed for installing, configuring and maintaining the PowerConnect 2708, PowerConnect 2716, PowerConnect 2724, and PowerConnect 2748 Web- managed Gigabit Ethernet switches.These switches can be used to connect workstations and other networ...
Page 8 - 6 1-Gigabit Ethernet Ports; 4 1-Gigabit Ethernet Ports + 2 SFP Combo ports; 8 1-Gigabit Ethernet Ports
8 16 1-Gigabit Ethernet Ports The following figure illustrates the PowerConnect 2716 front panel. Figure 1-2. PowerConnect 2716 Front Panel The PowerConnect 2716 switch supports 16 GbE copper ports. 24 1-Gigabit Ethernet Ports + 2 SFP Combo ports The following figure illustrates the PowerConnect 272...
Page 9 - Features; General Features; Unmanaged Mode; OFF
9 Features General Features Head of Line Blocking Prevention Head of Line (HOL) blocking results in traffic delays and frame loss caused by traffic competing for the same egress port resources. HOL blocking queues packets, and the packets at the head of the queue are forwarded before packets at the ...
Page 12 - VLAN Supported Features
12 VLAN Supported Features VLAN Support VLANs are collections of switching ports that comprise a single broadcast domain. Packets are classified as belonging to a VLAN based on either the VLAN tag or based on a combination of the ingress port and package contents. Packets sharing common attributes c...
Page 13 - Ethernet Switch Management Features; Port Default Settings
13 A CoS is defined by the user, whereby packets are related to the same Class of Service. After a packet has been classified, it is assigned to one of the queues. The PowerConnect 2708/2716/2724/2748 system can classify according to IPv4 information (DSCP). Class Of Service 802.1p Support The IEEE ...
Page 15 - Hardware Description; Switch Port Configurations
15 2 Hardware Description Switch Port Configurations PowerConnect 2708/2716/2724/2748 Front Panel Port Description The Dell™ PowerConnect™ 2708, 2716, 2724 and 2748 switches use 10/100/1000BASE-T ports on the front panel for connecting to a network.The Gigabit Ethernet ports can operate at 10, 100 o...
Page 19 - Power LED; Managed Mode LED
19 Physical Dimensions The PowerConnect 2708 switch has the following physical dimensions: • Height — 43.2 mm (1.7008 in.)• Width — 256 mm (10.079 in.)• Depth — 161.7 mm (6.366 in.) The PowerConnect 2716 and PowerConnect 2724 switches have the following physical dimensions: • Height — 43.2 mm (1.700...
Page 20 - Fan LED; Port LEDs
20 Fan LED (2748 only) On the PowerConnect 2748 front panel there is a fan LED. The following table describes the fan status LED indications. Port LEDs 10/100/1000BASE-T Port LEDs Each 10/100/1000BASE-T port has two LEDs. Speed/Link/Activity is indicated on the left LED and the duplex mode is indica...
Page 21 - Managed Mode Button
21 SFP Port LED The following table describes the SFP LED indications. Managed Mode Button The PowerConnect 2708/2716/2724/2748 has a Managed Mode push button on the front panel. The Managed Mode button is for changing between Managed Mode and Unmanaged (or Secure) Mode. After a change from Unmanage...
Page 22 - Switch Ventilation Fan; Cables, Port Connections, and Pinout Information; 000BASE-T Cable Requirements
22 Switch Ventilation Fan The PowerConnect 2748 switch has three fans and the PowerConnect 2724 switch has one fan for system ventilation. The PowerConnect 2708 and PowerConnect 2716 devices have no internal fans. Cables, Port Connections, and Pinout Information This section explains the switch phys...
Page 23 - SFP Ports
23 Table 2-7. RJ-45 Pin Number Allocation for 10/100/ 1000BASE-T Ethernet Port SFP Ports The PowerConnect 2724 switch supports two SFP transceivers combo ports, and the PowerConnect 2748 switch supports four SFP transceivers combo ports for various fiber-based modules (1000BASE-SX or 1000BASE-LX). O...
Page 24 - Pin Connections for SFP Interfaces; Power Connectors; Internal Power Supply Connector
24 Pin Connections for SFP Interfaces Table 2-8. SFP Pin Connections Power Connectors The PowerConnect 2708/2716/2724/2748 switches are powered by using the AC internal power supply. Internal Power Supply Connector The PowerConnect 2708, PowerConnect 2716, PowerConnect 2724 and PowerConnect 2748 swi...
Page 25 - Installing the DellTM PowerConnectTM 27XX; Installation Precautions; Overview
25 3 Installing the Dell™ PowerConnect™ 27XX This chapter contains information about unpacking, installation procedures, and how to make cable and port connections for the PowerConnect 2708, 2716, 2724, and 2748 devices. Installation Precautions CAUTION: Before performing any of the following proced...
Page 26 - Site Requirements; Power; General; Clearance; Unpacking; Safety
26 to Managed Mode. The chapter "Starting and Configuring the Dell™PowerConnect™ 2708/2716/2724/2748 for Managed Mode Operation" explains how to set the switch to Managed Mode. Site Requirements The PowerConnect 2708/2716/2724/2748 devices can be mounted in a standard equipment rack, placed ...
Page 27 - Handling Static Sensitive Devices; Package Contents; Unpacking the Device
27 Handling Static Sensitive Devices NOTICE: Static electricity can damage electronic Ethernet switch system. To avoid damage, keep static- sensitive Ethernet switches in their static-protective packages until they are ready to be installed. To reduce the possibility of electrostatic discharge, obse...
Page 28 - Mounting the Device; Product Information Guide
28 Mounting the Device The following mounting instructions apply to the PowerConnect 2708/2716/2724/2748 devices. There are three device mounting options: • Installing in a Rack• Installing on a Flat Surface• Installing on a Wall Installation Precautions CAUTION Before performing any of the followin...
Page 29 - Installing the Device; Installing the Device in a Rack
29 Installing the Device The following mounting instructions apply to all three hardware configurations of PowerConnect 2708, 2716, 2724 and 2748 devices. The section describes how to install a single device as a stand- alone device. Installing the Device in a Rack CAUTION: Disconnect all cables fro...
Page 30 - Installing the Device on a Flat Surface; Installing the Device on a Wall
30 Installing the Device on a Flat Surface The device can be installed on a flat surface, such as a desk-top, if it is not installed on a rack or on a wall. The surface must be able to support the weight of the device and the device cables. 1 Attach the self-adhesive rubber pads (provided with the d...
Page 31 - Connecting the Device to AC Power Supply
31 7 Secure the unit to the wall with screws (not provided). Ensure that the ventilation holes are not obstructed. Figure 3-4. Mounting Device on a Wall Connecting the Device to AC Power Supply 1 Using a 5-foot (1.5 m) standard power cable with safety ground connected, connect the power cable to the...
Page 32 - Connecting the Device to the Network
32 Figure 3-5. Back Panel Power Connector 2 After connecting the device to a power source, confirm that the device is connected and operating correctly by examining the LEDs on the front panel. Connecting the Device to the Network To connect to an uplink port, use Category 5 Unshielded Twisted-Pair ...
Page 33 - Viewing Switch Operation
33 4 Starting and Configuring the Dell™ PowerConnect™ 27XX NOTE: Before proceeding, read the release notes for this product. The release notes can be downloaded from support.dell.com. NOTE: It is recommended that the most recent revision of the user documentation is obtained from the Dell Support We...
Page 35 - Apply Changes
35 2 Enter the IP address, Subnet Mask and Default Gateway as supplied by the System Administrator. 3 Click Apply Changes . The switch is configured with the updated configuration parameters.
Page 37 - Understanding the Interface; Tree View
37 5 Using the Dell OpenManage™ Switch Administrator This section provides an introduction to the Embedded Web Server (EWS), which serves HTML pages through which the user can monitor the switch interface. Understanding the Interface The home page contains a Tree View — located on the left side of t...
Page 39 - Using the OpenManage Switch Administrator Buttons; Information Buttons; PowerConnect Switch Management Buttons
39 Using the OpenManage Switch Administrator Buttons This section describes the buttons found on the Dell™ PowerConnect™ OpenManage Switch Administrator interface. Information Buttons Information buttons provide access to on-line support and online help, as well as information about the OpenManage S...
Page 40 - Starting the Application
40 Starting the Application 1 Open a Web browser. 2 Enter the Ethernet Switch IP address (the default IP address is: 192.168.2.1) in the address bar and press <Enter> . For information about assigning an IP address to the Ethernet Switch, see " Viewing System IP Address ." 3 When the E...
Page 41 - Resetting the Device; Reset; OK
41 Resetting the Device The Reset page resets the device. To open the Reset page, click Reset in the tree view. Figure 5-2. Reset 1 Click Reset . A confirmation message displays. 2 Click OK . The device is reset.
Page 42 - Displaying Configuration on Demand; Previous; Next
42 Displaying Configuration on Demand The EWS shortens user wait time by providing Data Display on Demand. When the system retrieves vast amounts of configuration data, the data is divided into groups. The system administrator can peruse the configuration information by either selecting a specific i...
Page 43 - Configuring System Information; Defining Switch Information; Viewing the Switch Status
43 6 Configuring System Information This section provides information for defining system parameters including switch status features, downloading switch software, and modifying switch parameters. Defining Switch Information Viewing the Switch Status The Switch Status page contains parameters for co...
Page 44 - Secure Mode; Viewing System IP Address
44 Asset Tag (0-16 Characters) — Specifies the user-defined switch reference. Service Tag — The service reference number used when servicing the switch. System Name (0-32 Characters) — Defines the user-defined switch name. Location Name (0-32 Characters) — The location where the system is currently ...
Page 46 - IP Addressing
46 Configuring DHCP Client 1 Open the IP Addressing page. 2 Change the DHCP to Enable . 3 Click Apply Changes . The switch requests from the DHCP server to assign a new dynamic IP Address, Subnet Mask, and Default Gateway Address to manage the device. The dynamic DHCP IP Address, DHCP Subnet Mask, a...
Page 47 - Defining Interface Configuration
47 Defining Interface Configuration The Interface Configuration page enables the user to set the port parameters, such as port speed, port type, and additional port operational attributes. To open the page , click Interface Configuration in the tree view. Figure 6-3. Interface Configuration Interfac...
Page 49 - Viewing Jumbo Frames
49 Auto — Use to automatically detect the cable type. Current MDI/MDIX — Displays the current MDI/MDIX status of the port. LAG — Specifies if port is a part of a LAG (Link Aggregated Group). Configuring the Interface 1 Open the Interface Configuration page. 2 Define the fields. 3 Click Apply Changes...
Page 50 - Creating VLAN Membership
50 Current — Shows what the current status is for Jumbo Frames support. After Reset — Indicates the Jumbo Frames status after the next time the switch is powered on. Enabling Jumbo Frames 1 Open the Jumbo Frames page. 2 Select Enabled in the Jumbo Frames field. 3 Click Apply Changes . The Jumbo Fram...
Page 51 - Defining VLAN Interface Settings
51 Blank — The interface is not a VLAN member. Packets associated with the interface are not forwarded. Show VLAN ID — Displays the list of the VLAN IDs as defined in the switch. Create VLAN — Designates the ID of the particular VLAN defined. VLAN Name — Defines a new VLAN in the switch. Remove VLAN...
Page 52 - Configuring LAG Membership
52 Figure 6-6. VLAN Interface Settings Interface — Indicates the interface number of the port, LAG, or VLAN that is configured on the switch. PVID (1-4095) — Assigns a VLAN ID to untagged packets. The possible field values are 1-4094. VLAN 1 is used as the default VLAN. The default VLAN is only used...
Page 54 - Managing System Files; Startup Configuration File
54 Managing System Files Use the File Management section to manage switch software, the image file, and the configuration files. Files can be downloaded or uploaded via a TFTP server. This applies to the PowerConnect 2748 switch configuration only.The configuration file structure consists of the fol...
Page 55 - Downloading Files From Server
55 Downloading Files From Server The File Download page contains fields for downloading files from the TFTP server. To open the page, click File Download in the tree view. Figure 6-8. File Download (PowerConnect 2708, 2716, and 2724 Switch Configuration) TFTP Server IP Address — The TFTP Server IP A...
Page 57 - Server IP Address; Source File Name
57 Configuration Download Server IP Address (1-159 Characters) — The Server IP Address from which the configuration files are downloaded. Source File Name — Indicates the configuration files to be downloaded. Downloading Files from Server 1 Open the File Download page. 2 Define the file type to down...
Page 60 - Local User Database
60 Local User Database The Local User Database page contains fields for defining User Names, Passwords and access Level. To open the page, click the Local User Database in the tree view. Figure 6-12. Local User Database User Name (1-20 Characters) — Defines a User-defined user name. The Local User D...
Page 61 - Integrated Cable Test for Copper Cables
61 Adding a User to the Local User Database 1 Open the Local User Database page. 2 Select New and enter the field. 3 Complete the fields for the new user. 4 Click Apply Changes. The new user information is saved and the switch is updated. Deleting a User from the Local User Database 1 Open the Local...
Page 63 - Optical Transceivers Diagnostics
63 Optical Transceivers Diagnostics The Optical Transceivers Diagnostics page contains fields for performing tests on Fiber Optic cables. The optical transceiver provides access to a set of parameters that can be monitored and displayed to the system administrator. NOTE: The Optical Transceivers Dia...
Page 64 - Port Mirroring
64 3 Click show All . The test is performed and the Optical Transceiver Diagnostics test table opens. Port Mirroring The Port Mirroring mechanism monitors and mirrors the network traffic by forwarding copies of incoming and outgoing packets from monitored ports (up to four ports) to a monitoring por...
Page 65 - Enabling Storm Control
65 Enabling Storm Control When Layer 2 frames are forwarded, Broadcast, Multicast and Unknown Unicast frames are flooded to all ports on the designated VLANs on the switch. When the switch experiences an excessive amount of Broadcast/Multicast/Unknown Unicast frames on network links, Storm Control m...
Page 68 - Storm Control
68 The range is 3500 - 1000000. The default value is 3500. Modifying PowerConnect 2748 Storm Control Port Parameters 1 Open the Storm Control page. 2 Enter the fields. 3 Click Apply Changes . The Storm Control port parameters are saved to the PowerConnect 2748 switch.
Page 69 - Configuring Quality of Service; Classification
69 7 Configuring Quality of Service This section provides information for defining and configuring Quality of Service (QoS) parameters. Quality of Service (QoS) Overview An implementation example that requires QoS includes certain types of traffic such as Voice, Video, and real-time traffic, which c...
Page 70 - CoS Services; Strict Priority
70 Packets arriving untagged are assigned a default VPT value, which is set on a per port basis. The assigned VPT is used to map the packet to the egress queue.DSCP values can be mapped to priority queues. DSCP mapping is enabled on a per-system basis. The following table contains the default DSCP m...
Page 71 - Defining CoS Settings; Configuring QoS Settings
71 Defining CoS Settings Class of Service global parameters are set from the CoS Settings page. Configuring QoS Settings The CoS Settings page contains fields for enabling or disabling CoS. In addition, the Trust mode can be selected. The Trust Mode relies on predefined fields within the packet to d...
Page 72 - Mapping CoS Values to Queues
72 NOTE: The interface Trust settings overrides the global Trust setting. Strict Priority — Specifies if traffic scheduling is based strictly on the queue priority. This is the default value for queues. WRR — Specifies if traffic scheduling is based on the Weighted Round Robin (WRR) weights to assig...
Page 73 - Mapping DSCP Values to Queues
73 Mapping a CoS value to a Queue 1 Open the Cos to Queue page. 2 Define the egress queue for each CoS value. 3 Click Apply Changes . The CoS value is mapped to an egress queue, and the switch is updated. Mapping DSCP Values to Queues The DSCP to Queue page provides fields for defining egress queue ...
Page 75 - Viewing Statistics; RMON Statistics
75 8 Viewing Statistics RMON Statistics Remote Monitoring (RMON) is an extension to the Simple Network Management Protocol (SNMP) which provides network traffic statistics. RMON defines current and historical MAC-layer statistics and control objects, allowing real-time information to be captured acr...
Page 77 - Glossary
77 Glossary This glossary contains key technical words of interest. A Auto-negotiation Allows 10/100 Mpbs or 10/100/1000 Mbps Ethernet ports to establish for the following features: • Duplex/ Half Duplex Mode• Flow Control• Speed B Back Pressure A mechanism used with Half Duplex mode that enables a ...
