Dell N3048- User Manual

Menu-Driven Console Interface via Serial Port or Telnet   You can also connect a computer or terminal to the serial console port or use Telnet to access the switch. The interface is menu driven so you do not need to use a complex command syntax. The menus are similar to those in the Web interface. F...

Back to Contents Page Installation Dell™ PowerConnect™ 3048 Systems User's Guide    Package Contents    Before You Connect to the Network: Mounting-Kit Instructions    Connecting the Console Port    Password Protection    IP Address Assignment    Stacking    Connecting Devices to the Switch Package ...

connector, implemented as a data terminal equipment (DTE) connection.   To use the console port, you need the following equipment: l   A terminal or TTY-compatible terminal, or a PC or portable system with a serial port and the ability to emulate a terminal. l   A null modem or crossover RS-232 cabl...

  1.   From the Main Menu, select System Manager . Press <Enter>. 2.   In the first field, type the correct IP address for this system (consult your network administrator). 3.   Enter the address of the default gateway for the network to which the switch is attached. 4.   Enter the appropriate...

Back to Contents Page Web Interface Dell™ PowerConnect™ 3048 Systems User's Guide     With web-based management, you can configure the PowerConnect 3048 Fast Ethernet Managed Switch and monitor the system using a web browser.   Most web pages for the switch feature the following buttons: l   Reload ...

Home   The Home page briefly describes the Web-based management features.   System Manager   The System Manager page contains all system operations and general information. It includes links to the following options: l   General Info — to view general system information and perform general administr...

IP Settings   In the IP Settings page, you can manage the IP-related information about the system. The page includes the following editable fields: l   IP Address l   Default Gateway l   Network Mask l   IP Assignment Mode — Sets whether IP functionality is enabled through manual (static) configurat...

Firmware Upgrade   From the Firmware Upgrade page, you can configure the system to download a new version of the management software. You can also set the system to use the new software without overwriting the previous version. See " Software Upgrades " for more information about this proces...

  Reset   Select Reset to reboot the switch. When prompted, confirm that you want to reset the switch.   Port Manager   The Port Manager contains links to the following options: l   Port Settings l   GBIC Port Settings   On this page, you can view and edit port parameters. For each port number liste...

l   Link — Shows the status of the link: Up or Down. l   Admin Enabled — Shows whether a port has been enabled by the network administrator. A network administrator can manually disable a port. l   State — Describes the state of the port as determined by the Spanning Tree Protocol. l   Operating Par...

Address Aging   In the Address Aging page, you can specify how long an address stays available to the switch if it is not configured as static.     The following option is available: l   Aging Time — The time before an address is purged from the system. You can change this value to any number betwee...

Spanning Tree   The Spanning Tree page contains links to the following pages that allow you to specify the parameters of the spanning tree protocol:   l   Bridge Settings l   Port Settings Bridge Settings   From the Bridge Settings page, you can enable and configure the Spanning Tree. The following ...

l   Cost — Assigned to this port for the Spanning Tree Protocol (1- 65536). A port with a lower cost is less likely to be blocked if the Spanning Tree Protocol is detecting network loops. l   Fast Link — Immediately enables the port in forwarding state when a link comes up. The port is not part of t...

2.   Check the Remove VLAN box for the VLAN you want to remove. 3.   Click Apply . Add VLAN Membership 1.   Under the Show VLAN drop-down menu, select the VLAN you want to edit. 2.   Change the VLAN member by clicking the port icon until the desired state [ T (tagged) or U (untagged)] or blank appea...

  In the Default Port CoS page, you can specify the priority for each port on your switch.   Layer 3 Priority — DiffServ l   DiffServ — You can change the default Type of Service (ToS) priority by selecting Normal Priority or High Priority for each class of services. This setting leverages the IETF ...

Trap Settings   You can enable or disable authentication traps on the Trap Settings page: l   Enabled — The system generates an SNMP trap upon a host authorization failure. l   Disabled — The system does not generate authentication traps.   All hosts in community strings with trap privileges are not...

l   Enabled — The system detects IGMP queries and report packets and manages IP multicast traffic through the switch. l   Disabled — The switch forwards traffic and ignores any IGMP requests.   Statistics   From the Statistics page, you can chart a variety of system data. There are three types of gr...

History Chart   The History Chart charts one type of statistic for any combination of ports. The chart presents data across a set time period so that you can monitor fluctuations over time. l   Statistics — The type of system data to be monitored l   Refresh Rate — The time interval between automati...

Counter Summary   The Counter Summary page allows you to view all ports accumulated, unicasts and nonunicasts received and transmitted, and errors received and transmitted.   Click the Refresh button to refresh the Counter Summary page.   Save Configuration   If you make any changes to the system th...

Back to Contents Page Console Interface Dell™ PowerConnect™ 3048 Systems User's Guide     You can access the console, using VT100 terminal emulation, from the RS-232 serial port or a Telnet connection. The switch offers password protection for this interface.     When the Telnet session opens, under...

  From the initial welcome screen, you must enter a password to proceed, if password protection is enabled. If password protection is disabled, the Main Menu is displayed and you immediately have access to the switch management interface. By default, password protection is disabled. If enabled, the ...

IP Settings   This menu manages the IP-related information about the computer.   The IP Settings page includes the following editable fields: l   IP address l   Network mask l   Gateway address   Press <Ctrl><w> to save any changes made.     See " Installation " for more informat...

l   Admin — Allows the administrator to enable or disable the port. l   State — Displays this port is blocking and forwarding. l   Rate/Duplex — Offers the choice of Full , Half , or Auto , which automatically detects the value of the attached device and sets the port duplex mode accordingly. l   Fl...

  Dynamic Addresses   The Dynamic Addresses lookup table allows you to view the MAC addresses that are currently in the address database. When addresses are in the database, the packets intended for those addresses are forwarded directly to those ports. You can filter out the table by port, VLAN, an...

  Static Multicast Groups Membership   Static multicast is a way to manage multicast traffic. Each multicast address can be assigned ports that will participate in that multicast group. Ports that are added to a multicast group will forward all multicast packets from the specified multicast address ...

¡   Hello Time — The interval between configuration messages sent by the spanning tree protocol. ¡   Max Age — The amount of time before the system discards a configuration message. ¡   Forward Delay — The amount of time the system spends in learning and listening states. ¡   Bridge Priority — The p...

l   CoS Settings l   Layer 3 Priority — DiffServ   VLAN Administration   You can add up to 64 VLANs with unique ID numbers and names. VLAN ID numbers must be in the range of 1 to 4094. Add a VLAN l   Type a unique numeric VLAN ID and press <Enter>. l   Type a unique VLAN name and press <Ent...

PVID Settings   In the PVID Settings screen, you can specify the Port VLAN ID (PVID) for each port on your switch. All untagged packets entering the switch are tagged by default with the ID specified by the port's PVID.   CoS Settings   Port Priority allows the user to specify which ports have great...

Community Table   In the Community Table page, you can create different communities and customize access. The public string has Get privileges by default.   The following options are available: l   Community String — Type the name of the community you want to create. l   Get — Allows read access to ...

Back to Contents Page Software Upgrades Dell™ PowerConnect™ 3048 Systems User's Guide Upgrade Procedure     The application software is field upgradable. The new software must reside on a TFTP server that can be accessed by the switch.   To upgrade the software, you must go to the Firmware Upgrade s...

Back to Contents Page Appendix Dell™ PowerConnect™ 3048 Systems User's Guide VLAN Description   Packets received by the switch are treated in the following ways: l   When an untagged packet enters a port, the system automatically tags it with the port's default VLAN ID tag number. Each port has a de...

3.   To allow untagged packets to participate in the new VLAN, change the Port VLAN IDs for the relevant ports.   Example 2   Example 2 steps through a more elaborate setup illustrating all possible scenarios for a comprehensive understanding of tagged VLANs. 1.   Set up VLANs as shown in the follow...

3.   Set up the Port VLAN IDs as shown in the following illustration:     The specific ports shown in the previous illustration have the following port VLAN ID settings. The port VLAN ID settings for each port are configured in the PVID Settings page:     The VLANs set up in the preceding procedure ...

  Check the following: ¡   The cable to connect the switch. Ensure that you are using an RJ-45 (network) cable and not an RJ-11 (telephone) cable. ¡   Ensure that the power cord is firmly connected to the relevant switch unit and to the supply outlet. If the connection is secure and there is still n...

Technical Assistance   If you need help with a technical problem, Dell is ready to assist you.   1.   Make a copy of the Diagnostics Checklist and fill it out. 2.   Use Dell's extensive suite of online services available at Dell Support ( support.dell.com ) for help with installation and troubleshoo...

portable and desktop computers.   When you call AutoTech, use your touch-tone telephone to select the subjects that correspond to your questions.  The AutoTech service is available 24 hours a day, 7 days a week. You can also access this service through the technical support service. For the telephon...

Contacting Dell   To contact Dell electronically, you can access the following websites: l   www.dell.com l   support.dell.com (technical support) l   premiersupport.dell.com (technical support for educational, government, healthcare, and medium/large business customers, including Premier, Platinum,...

Regulatory Notices Electromagnetic Interference (EMI) is any signal or emission, radiated in free space or conducted along power or signal leads, that endangers the functioning of a radio navigation or other safety service or seriously degrades, obstructs, or repeatedly interrupts a licensed radio c...

This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate...

the limits set by the EPA's ENERGY STAR ®  Computers program. ENERGY STAR ®  Emblem The EPA's ENERGY STAR ®  Computers program is a joint effort between the EPA and computer manufacturers to reduce air pollution by promoting energy- efficient computer products. The EPA estimates that use of ENERGY S...

Class B ITE This is a Class B product based on the standard of the Voluntary Control Council for Interference (VCCI) for information technology equipment. If this equipment is used near a radio or television receiver in a domestic environment, it may cause radio interference. Install and use the equ...

Please note that this device has been approved for nonbusiness purposes and may be used in any environment, including residential areas. MIC Class B Regulatory Label If the regulatory label includes the following marking, your computer is a Class B product. Polish Center for Testing and Certificatio...

Back to Contents Page Caution: Safety Instructions Dell™ PowerConnect™ 3048 Systems User's Guide     Use the following safety guidelines to ensure your own personal safety and to help protect your system from potential damage. General l   Observe and follow service markings. Do not service any produ...

l   Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications. Always follow your local/national wiring rules. l   When connecting or disconnecting power to hot-pluggable power supplies, if offered with your system, observe the following guideli...

    Back to Contents Page     CAUTION: A qualified electrician must perform all connections to DC power and to safety grounds. All electrical wiring must comply with applicable local or national codes and practices.   CAUTION: Never defeat the ground conductor or operate the equipment in the absence...