Dell PowerConnect 2848 User's Guide
Dell PowerConnect 2848 Manual
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- Dell PowerConnect 2848 | User's Guide - Page 1
Dell™ PowerConnect™ 28xx Systems User Guide www.dell.com | support.dell.com - Dell PowerConnect 2848 | User's Guide - Page 2
you how to avoid the problem. CAUTION: A CAUTION indicates Dell Inc. is strictly forbidden. Trademarks used in this text: Dell, Dell OpenManage, the DELL logo, Inspiron, Dell Precision, Dimension, OptiPlex, PowerConnect refer to either the entities claiming the marks and names or their products. Dell - Dell PowerConnect 2848 | User's Guide - Page 3
17 Switch Port Configurations 17 PowerConnect 28xx Front and Back Panel Port Description 17 Physical Dimensions 21 LED Definitions 21 Power LED 22 Managed Mode LED 22 Fan LED (2824/2848 only 22 Port LEDs 22 Managed Mode Button 23 Switch Ventilation Fan 23 Cables, Port Connections - Dell PowerConnect 2848 | User's Guide - Page 4
36 MDI/MDIX 36 Flow Control 36 Back Pressure 36 Switching Port Default Settings 37 4 Starting and Configuring the Device 39 Booting the Device - Managed Mode 40 Initial Configuration - Managed Mode 41 Advanced Configuration 44 Retrieving an IP Address From a DHCP Server 45 4 Contents - Dell PowerConnect 2848 | User's Guide - Page 5
FLASH File 46 Erasing the Device Configuration 47 Password Recovery 47 Software Download Through TFTP Server 47 Management Modes 49 Default Values 49 Transitioning Between Modes 50 Returning to Managed Mode 51 5 Using Dell OpenManage Switch Administrator 53 Understanding the Interface 53 - Dell PowerConnect 2848 | User's Guide - Page 6
Pool 85 Excluding Addresses 87 Manually Allocating IP Addresses (Static Hosts 89 Configuring Address Binding 92 Defining Advanced Settings 93 Configuring General Device Parameters 93 7 Configuring Device Switching 95 Configuring Network Security 95 Configuring Port Based Authentication 96 - Dell PowerConnect 2848 | User's Guide - Page 7
VLANs 126 Defining VLAN Members 126 VLAN Port Membership Table 128 Defining VLAN Ports Settings 130 Defining VLAN LAG Settings 131 Aggregating Ports 133 Defining LAG Membership 134 Multicast Forwarding Support 134 Defining Multicast Global Parameters 135 Adding Bridge Multicast Address - Dell PowerConnect 2848 | User's Guide - Page 8
ethernet 165 Command: interface port-channel 165 Command: interface vlan 166 Command: ip address 166 Command: ip default-gateway 167 Command: login 167 Command: ping 167 Commad: reload 169 Command: show tech-support command 169 Command: snmp-server community 171 Command: username 172 - Dell PowerConnect 2848 | User's Guide - Page 9
hardware configurations of the PowerConnect 28xx. The switches are managed by Dell's OpenManage Switch Administrator. PowerConnect 2808 The following figure illustrates the PowerConnect 2808 front panel. Figure 1-1. PowerConnect 2808 Front Panel 1 The PowerConnect 2808 supports the following ports - Dell PowerConnect 2848 | User's Guide - Page 10
supports the following ports: • 16 Gigabit Ethernet copper ports PowerConnect 2824 The following figure illustrates the PowerConnect 2824 front panel. Figure 1-3. PowerConnect 2824 Front Panel The PowerConnect 2824 supports the following ports: • 24 Gigabit Ethernet copper ports • 2 SFP combo ports - Dell PowerConnect 2848 | User's Guide - Page 11
changes by removing the IP address of the device so that it becomes inaccessible for configuration. For more information about the management modes, see "Management Modes" on page 49. Head of Line Blocking Prevention Head of Line (HOL) blocking results in traffic delays and frame loss caused by - Dell PowerConnect 2848 | User's Guide - Page 12
overhead and reduced host processing overhead. Jumbo frames are used for server-to-server transfers. AutoMDI/MDIX Support The switch automatically detects whether the cable connected to an RJ-45 port is crossed or straight through. Standard wiring for end stations is Media-Dependent Interface (MDI - Dell PowerConnect 2848 | User's Guide - Page 13
with ports by learning them from the incoming frames source address. 802.1D Bridging in Unmanaged Mode In Unmanaged Mode, the switch performs classic bridging. Frames are forwarded based on their destination MAC address only, regardless of the VLAN tag. MAC Multicast Support Multicast service is - Dell PowerConnect 2848 | User's Guide - Page 14
support up to six aggregated links. Each of the six aggregated links may be defined with up to four member ports to form a single Link Aggregated Group (LAG). The benefits of this facility are: • Fault tolerance protection from physical link disruption 14 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 15
of ports with the same speed set to full-duplex operation. DHCP Server Dynamic Host Configuration Protocol is a method of managing network parameter assignment from a single DHCP server. The Dynamic Host Configuration Protocol (DHCP) automates the assignment of IP addresses, subnet masks, default - Dell PowerConnect 2848 | User's Guide - Page 16
to be captured across the entire network. The switches support one RMON group for Ethernet statistics. The system provides a means to collect the statistics defined in RMON and to view the results, using the Web management interface in the system. 16 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 17
Configurations PowerConnect 28xx Front and Back Panel Port Description The Dell™ PowerConnect™ 28xx 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 or 1000 Mbps. These ports support autonegotiation, duplex mode - Dell PowerConnect 2848 | User's Guide - Page 18
side on the front panel, is used to transition between management modes and to reset the device. For more information about management modes and transitioning between them, see "Management Modes" on page 49. Figure 2-4. PowerConnect 2816 Back Panel 18 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 19
device is powered on or not. A Mode push-button, located on the right side on the front panel is used to transition between management modes and to reset the device. For more information about management modes and transitioning between them, see "Management Modes" on page 49. Dell PowerConnect 28xx - Dell PowerConnect 2848 | User's Guide - Page 20
Managed Mode LED which indicates the Ethernet switch operational status and the management mode. The Fan LED indicates the device fan operations status, and the Power LED on the front panel indicates whether the device is powered on or not. A Mode push- 20 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 21
the following physical dimensions: • Height - 43.2 mm (1.70 in.) • Width - 440 mm (17.32 in) • Depth - 255 mm (10.04 in.) LED Definitions The front panel contains LEDs that indicate the status of links, power supply, fan status, and Managed Mode status. Dell PowerConnect 28xx Systems User Guide 21 - Dell PowerConnect 2848 | User's Guide - Page 22
, firmware loading, or Management Mode transition. Indicates the switch is in Managed Mode. Diagnostics has failed. No valid image. Indicates Unmanaged mode or Secure mode. Fan LED (2824/2848 only) On the PowerConnect 2824 and PowerConnect 2848 front panel there is a fan LED. The following table - Dell PowerConnect 2848 | User's Guide - Page 23
Duplex mode. SFP Port LED The following table describes the SFP LED indications. Table 2-5. SFP LED Indications LED Color Description Green Solid Link is established. Green Flashing Activity is occurring. Off No link is established. Managed Mode Button The PowerConnect 28xx has a Mode push - Dell PowerConnect 2848 | User's Guide - Page 24
are connected through standard RJ-45 connectors to the switch physical interface ports, located on the front panel. For each device, the supported mode is set to Half Duplex, Full Duplex, and Auto. 1000BASE-T Cable Requirements All Category 5 UTP cables that are used for 100BASE-TX connections also - Dell PowerConnect 2848 | User's Guide - Page 25
the control interfaces. PowerConnect 2824 switch supports SFP diagnostics. The optical transceiver provides access to a set of parameters that can be monitored and displayed to the system administrator. NOTE: If both RJ-45 and SFP ports are present, the SFP port will be the active port, whereas the - Dell PowerConnect 2848 | User's Guide - Page 26
The PowerConnect 28xx supports a single internal power supply to provide power for switching operations. The internal power supply supports input voltages between 100 and 240 VAC. The AC power connector is located on the back panel of the switch. 26 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 27
documentation. Opening or removing covers marked with a triangular symbol with a lighting bolt may cause electrical shock. These components are to be serviced by trained service technicians only. • Ensure that the power cable, extension cable, and/or plug is not damaged. • Ensure that the device is - Dell PowerConnect 2848 | User's Guide - Page 28
following items are included: • The device • AC power cable • Self-adhesive rubber pads (for on-shelf installation) • Rack-mount kit for installation • Documentation CD • Product Information Guide Unpacking the Device To unpack the PowerConnect device: NOTE: Before unpacking the device, inspect the - Dell PowerConnect 2848 | User's Guide - Page 29
a rack as follows: 1 Place the supplied rack-mounting bracket on one side of the device ensuring the mounting holes on the device line up to the mounting holes on the rack mounting bracket. The following figure illustrates where to mount the brackets. Dell PowerConnect 28xx Systems User Guide 29 - Dell PowerConnect 2848 | User's Guide - Page 30
pads (provided with the device) on each marked location on the bottom of the chassis. 2 Set the device on a flat surface, while leaving 2 inches (5.08 cm) on each side and 5 inches (12.7 cm) at the back. 3 Ensure that the device has proper ventilation. 30 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 31
near any data or electrical cabling. • The power cable must be able to reach an outlet. 2 Place the supplied wall-mounting bracket on one side of the device, ensuring that the mounting holes on the device line up to the mounting holes on the rack-mounting bracket. The following figure illustrates - Dell PowerConnect 2848 | User's Guide - Page 32
with internal crossover wiring (MDI/MDIX) operation under Auto-Negotiation mode. Standard straight-through twisted-pair cables can be used to connect to any other Ethernet network (systems, servers, switches or routers) that supports auto-negotiation. 32 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 33
you have the latest service packs installed. With Windows 2000 Service Pack 2, the arrow keys function properly in HyperTerminal's VT100 emulation. Go to www.microsoft.com for information on Windows 2000, Windows XP, and Windows Vista service packs. Dell PowerConnect 28xx Systems User Guide 33 - Dell PowerConnect 2848 | User's Guide - Page 34
in the steps detailed in Starting and Configuring the Device. Figure 3-4. Connecting to Power Supply 3 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. 34 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 35
Diagnostics are supported. RJ-45 Connections for 10/100/1000BaseT Ports The 10/100/1000BaseT ports are copper twisted-pair ports. To establish a link for the twisted-pair ports, Tx pair on one cable end must be connected to the Rx pair on the other cable end, and vice versa. If the cabling is done - Dell PowerConnect 2848 | User's Guide - Page 36
cable and a crossover cable irrelevant. (The standard wiring for end stations is known as MDI (Media Dependent Interface), and the standard wiring for hubs and switches is known as MDIX.) Flow Control The device supports 802.3x Flow Control for ports configured with the Full Duplex mode. By default - Dell PowerConnect 2848 | User's Guide - Page 37
and mode Port forwarding state Port tagging Flow Control Back Pressure MDIX (not user-configurable) Default Setting 10/100/1000BaseT copper: auto-negotiation full duplex Enabled No tagging On Off (disabled on ingress) On (relevant to coppers ports only) Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 38
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is required if the device is to be used in a managed mode. NOTE: The PowerConnect 2808 has an internal serial port. NOTE: Before proceeding, read the release notes for this product. The release notes can be downloaded from http://support.dell.com. NOTE: It is recommended that you obtain the most - Dell PowerConnect 2848 | User's Guide - Page 40
Standard Device Installation Advanced Configuration: IP Address from DHCP Advanced Device Installation Booting the Device - Managed Mode The procedure described in this section refers to the device when set to operate as a managed switch. The PowerConnect 2808/16/24/48 models include a built - Dell PowerConnect 2848 | User's Guide - Page 41
router) IP address for configuring the default route. The Setup Wizard guides you through the initial device configuration, and gets the system up and running as quickly as possible. You can skip using the setup wizard and configure the device manually through the device CLI mode (see "Managing the - Dell PowerConnect 2848 | User's Guide - Page 42
and SNMP Management System IP address (optional) • Username and Password • Device IP address • IP subnet mask • Default Gateway IP address The Setup Wizard displays the following information: Welcome to Dell Easy Setup Wizard. The Setup Wizard guides you through the initial switch configuration, and - Dell PowerConnect 2848 | User's Guide - Page 43
default VLAN ,(VLAN #2) . This is the IP address you use to access the Telnet, Web interface, or SNMP interface for the switch. To setup an IP address: Please enter the IP address of the device (A.B.C.D):10.6.22.100 Please enter the IP subnet mask (A.B.C.D or nn):[255.255.255.224] Dell PowerConnect - Dell PowerConnect 2848 | User's Guide - Page 44
This section provides information about dynamic allocation of IP addresses. When configuring/receiving IP addresses through DHCP, the configuration received from the server includes the IP address, and may include subnet mask and default gateway. 44 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 45
as a DHCP client. When the device is reset, the DHCP command is saved in the configuration file, but not the IP address. To configure the device so it will retrieve an IP address from a DHCP server, use the web interface (see "Defining DHCP Server Settings" on page 83). NOTE: It is not necessary - Dell PowerConnect 2848 | User's Guide - Page 46
[2] Erase Flash File [3] Password Recovery Procedure [4] Enter Diagnostic Mode [5] Set Terminal Baud-Rate [6] Back configuration must be erased. If the configuration is erased, all parameters configured via CLI, EWS or SNMP must be reconfigured. 46 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 47
. To download a system image through the TFTP server: 1 Ensure that an IP address is configured on one of the device ports and pings can be sent to a TFTP server. 2 Make sure that the file to be downloaded is saved on the TFTP server (the ros file). Dell PowerConnect 28xx Systems User Guide 47 - Dell PowerConnect 2848 | User's Guide - Page 48
programming it into the flash updates the boot image. The boot image is loaded when the device is powered on. A user has no control over the boot image copies. To download a boot image through the TFTP server: 1 Ensure that an IP address is configured on one of the device ports and pings can be sent - Dell PowerConnect 2848 | User's Guide - Page 49
22). Default Values The factory default values, used when the device is in Unmanaged mode, include: • IP Address - 192.168.2.1 • Netmask - 255.255.255.0 • Username - admin • Permission - R/W privilege • DHCP Client - Off • Flow Control - On • STP - Off Dell PowerConnect 28xx Systems User Guide 49 - Dell PowerConnect 2848 | User's Guide - Page 50
Transitioning Between Modes The following diagram summarizes movement between modes: Figure 4-2. Transitioning Between Management Modes 50 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 51
the saved configuration. • Use Current IP/User Name/Password - When restoring local configuration, this option uses the system default IP address, user name and password. • Apply Changes - The selected configuration is restored and the device reboots. Dell PowerConnect 28xx Systems User Guide 51 - Dell PowerConnect 2848 | User's Guide - Page 52
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right side of the home page, the device view provides a view of the device, an information or table area, and configuration instructions. Figure 5-1. Switch Administrator Components 5 Table 5-1 lists the interface components with their corresponding numbers. Dell PowerConnect 28xx Systems User - Dell PowerConnect 2848 | User's Guide - Page 54
information about the device and access to Dell Support. For more information, see "Information Buttons." Device Representation The PowerConnect home page contains a graphical device representation of the front panel. Figure 5-2. Port LED Indicators 54 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 55
Help About Log Out Description Opens the Dell Support page at support.dell.com. Online help containing information to assist in configuring and managing the device. The online help pages are linked directly to the page currently open. For example, if the IP Addressing page is open, the help topic - Dell PowerConnect 2848 | User's Guide - Page 56
password, see "Password Recovery. NOTE: Passwords are both case sensitive and alpha-numeric. NOTE: The device can be managed via web interface only in Managed mode. For more information about management modes, see "Management Modes" on page 49. 4 Click OK. The Dell PowerConnect OpenManage™ Switch - Dell PowerConnect 2848 | User's Guide - Page 57
edit all pages of the interface. • Monitor - This is a read-only mode where you can see a subset of the interface pages, but you cannot edit them. For more information about setting the access level, see ("Defining the Local User Databases" on page 69). Dell PowerConnect 28xx Systems User Guide 57 - Dell PowerConnect 2848 | User's Guide - Page 58
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Information The General page contains links to pages for configuring device parameters. Viewing Device Information The Asset page contains parameters for configuring general device information, including the system name, location, and contact, the system MAC Address, System Object ID, date, time - Dell PowerConnect 2848 | User's Guide - Page 60
MAC Address - Specifies the device MAC address. • Sys Object ID - Specifies the vendor's authoritative identification of the network management subsystem contained in the entity. • Service Tag - Specifies the service reference number used when servicing since the last device reset. The system time is - Dell PowerConnect 2848 | User's Guide - Page 61
System Information: 1 Open the Asset page. 2 Define the relevant fields. 3 Click Apply Changes. The system parameters are defined, and the device is updated. Initiating a Telnet Session: 1 Open the Asset page. 2 Click Telnet. A Telnet session is initiated. Viewing the Versions Page The Versions page - Dell PowerConnect 2848 | User's Guide - Page 62
location. For more information about saved Configuration files, see "Managing Files" on page 80. To open the Reset page, click System → General → Reset in the tree view. Figure 6-4. Reset Resetting the Device 1 Open the Reset page 2 Click reset. A confirmation message displays. 3 Click OK. The - Dell PowerConnect 2848 | User's Guide - Page 63
through power cycles just like in Managed Mode. To use Secure Mode, configure the device in Managed Mode, and then switch to Secure Mode via the web interface. To exit Secure Mode, press the Managed Mode button on the device to enter the Managed Mode default configuration with the default IP address - Dell PowerConnect 2848 | User's Guide - Page 64
Parameters • DHCP - The DHCP client can be enabled to acquire the network configuration dynamically. The DHCP default value is Disable. This field enables the DHCP client. • IP Address - Specifies the static IP Address currently assigned to the device. • Subnet Mask- Specifies the subnet mask of - Dell PowerConnect 2848 | User's Guide - Page 65
parameters: 1 Open the IP Interface Parameters page. 2 Set DHCP to Disable. 3 Set the IP Address, Subnet Mask and Default Gateway. 4 Click Apply Changes. The static interface parameters are set and the device is updated. Running Cable Diagnostics The Diagnostics page contains links to pages for - Dell PowerConnect 2848 | User's Guide - Page 66
the port where the cable error occurred. • Last Update - The last time the port was tested. • Approximate Cable Length - The approximate cable length. This test can only be performed when the port is up and operating at 1 Gbps. Performing a Cable Test 1 Ensure that both ends of the copper cable are - Dell PowerConnect 2848 | User's Guide - Page 67
for Copper Cables page. 2 Click Show All. The Virtual Cable Test Results Table opens. Viewing Optical Transceiver Diagnostics The Optical Transceiver Diagnostics page contains fields for performing tests on Fiber Optic cables. Optical transceiver diagnostics can be performed only when the link is - Dell PowerConnect 2848 | User's Guide - Page 68
• LOS - Loss of signal. • Data Ready - The transceiver has archived power up and data is ready. • N/A - Not Available, N/S - Not Supported, W - Warning, E - Error. Fiber Optic analysis feature works only on SFPs that support the digital diagnostic standard SFF-4872. 68 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 69
setting security parameters for user database, password and RADIUS security. To open the Management Security page, click System→Management of the OpenManage Switch Administrator. • Password (0-64 Characters) - User-defined password. • Confirm Password - Confirms the user-defined password. • Remove - Dell PowerConnect 2848 | User's Guide - Page 70
passwords are defined, and the device is updated. Defining a New User: 1 Open the Local User Database page. 2 Click Add. The Add User page opens: Figure 6-10. Add a User 3 Define the fields. 4 Click Apply Changes. The new user is defined, and the device is updated. Displaying the Local User Table - Dell PowerConnect 2848 | User's Guide - Page 71
method for: • Telnet Access • Web Access • Console to Device Access To open the RADIUS Settings page, click System → Management Security → RADIUS in the tree view. Figure 6-12. RADIUS Settings • IP Address - The list of Authentication Server IP addresses. Update with your book title 71 - Dell PowerConnect 2848 | User's Guide - Page 72
server. This key is encrypted. • Source Address - Specifies the source IP address that is used for communication with RADIUS servers. Defining RADIUS Parameters: 1 Open the RADIUS Settings page. 2 Define the fields. 3 Click Apply Changes. The RADIUS setting are updated to the device. Adding a RADIUS - Dell PowerConnect 2848 | User's Guide - Page 73
, and the device is updated. Displaying the RADIUS Server List: 1 Open the RADIUS Settings page. 2 Click Show All. The Show all RADIUS Servers page opens: Figure 6-14. Show all RADIUS Servers Modifying the RADIUS Server Settings: 1 Open the RADIUS Settings page. Update with your book title 73 - Dell PowerConnect 2848 | User's Guide - Page 74
Servers List. Defining SNMP Parameters Simple Network Management Protocol (SNMP) provides a method for managing network devices. Devices supporting SNMP run a local software (agent). tree view. This section contains information for managing the SNMP configuration. 74 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 75
page. 2 Select Enable in the SNMP Notifications field. 3 Click Apply Changes. SNMP notifications are enabled, and the device is updated. Enabling Authentication Notifications 1 Open the SNMP Global Parameters page. 2 Select Enable in the Authentication Notifications field. 3 Click Apply Changes - Dell PowerConnect 2848 | User's Guide - Page 76
in the tree view. Figure 6-16. SNMP Community • SNMP Management Station - A list of management station IP addresses. • Community String - Functions as a password and used to authenticate the selected management station to the device. • Access Mode - Defines the access rights of the community. The - Dell PowerConnect 2848 | User's Guide - Page 77
for all management stations. 4 Define the remaining fields. 5 Click Apply Changes. The new community is saved, and the device is updated. Displaying all Communities 1 Open the SNMP Community page. 2 Click Show All. The Community Table opens: Figure 6-18. Community Table Deleting Communities - Dell PowerConnect 2848 | User's Guide - Page 78
the IP address to whom the traps are sent. • Community String - Functions as a password and used to authenticate the selected management station to the device. • Notification Version - Determines the trap type. The possible field values are: - SNMPv1 - SNMP Version 1 traps are sent. 78 Update with - Dell PowerConnect 2848 | User's Guide - Page 79
recipient is added, and the device is updated. Displaying Notification Recipients Tables 1 Open Notification Recipients page. 2 Click Show All. The Notification Recipients Tables page opens: Figure 6-20. Notification Recipients Tables Deleting Notification Recipients 1 Open Notification Recipients - Dell PowerConnect 2848 | User's Guide - Page 80
of the following configuration files: • Startup Configuration File - Contains the commands required to reconfigure the device to the same settings as when the device is powered down or rebooted. • Running Configuration File - Contains all Startup file commands, as well as all commands entered during - Dell PowerConnect 2848 | User's Guide - Page 81
file is downloaded. The possible field values are: - Software Image - Downloads the software image file. - Boot Code - Downloads the boot file. Configuration Download • Server IP Address - The Server IP Address from which the configuration files are downloaded. Update with your book title 81 - Dell PowerConnect 2848 | User's Guide - Page 82
. • Upload via HTTP - Enables initiating a configuration file upload via the FTP server. • TFTP Server IP Address - The Server IP Address to which the file is uploaded. • Destination File Name (1-64 Characters) - Indicates the file path to which the file is uploaded. 82 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 83
Settings 1 Open the Restore Defaults page. 2 Check the Restore Configuration Factory Defaults checkbox. 3 Click Apply Changes. The settings are restored. Defining DHCP Server Settings The DHCP server is used mainly for centralized control over assignment of IP addresses to attached hosts. A switch - Dell PowerConnect 2848 | User's Guide - Page 84
- A network device obtains a leased IP address for a specified period of time. The IP address is revoked at the end of this period and the switch must request another IP address. This section contains information for configuring a DHCP server on a DHCP-server-enabled switch. To open the DHCP Server - Dell PowerConnect 2848 | User's Guide - Page 85
Optionally specifies the number of pings that are sent before an IP address can be assigned to a requesting client. The range is 1 to 10 and the default value is two. - Use Default - Reverts to the default Ping Retries setting (2 retries). • DHCP Ping Timeout- Optionally specifies the amount of time - Dell PowerConnect 2848 | User's Guide - Page 86
address prefix. • Address Pool Start - Specifies the first IP address in the range of the network pool. • Address Pool End - Specifies the last IP address Used Pool's Addresses - Specifies the number of the pool's addresses that are currently used. • Default Router - Specifies the default router for - Dell PowerConnect 2848 | User's Guide - Page 87
is the default. • SNTP Server - Specifies the time server for the DHCP client. • Next Server - Specifies the IP address of the next server in the boot process of a DHCP client. If the next server in the boot process is not configured, the DHCP Server uses inbound interface helper addresses as boot - Dell PowerConnect 2848 | User's Guide - Page 88
Figure 6-26. Excluded Addresses • Start IP Address - Displays the first IP address in the range of excluded IP addresses. • End IP Address - Displays the last IP address in the range of excluded IP addresses. Adding an Excluded Address 1 Open the Excluded Addresses page. 2 Click Add. The Add - Dell PowerConnect 2848 | User's Guide - Page 89
.6811.72. • MAC Address - Specifies the MAC Address of DHCP static host. • Client Name - Specifies the name of the client, using a standard set of ASCII characters. The client name must not include the domain name. The range is up to 32 characters. • Default Router - Specifies the default router for - Dell PowerConnect 2848 | User's Guide - Page 90
is the default. • SNTP Server - Specifies the time server for the DHCP static host. • Next Server - Specifies the IP address of the next server in the boot process of a DHCP client. If the next server in the boot process is not configured, the DHCP Server uses inbound interface helper addresses as - Dell PowerConnect 2848 | User's Guide - Page 91
Static Host 3 Define the relevant fields. 4 Click Apply Changes. The static host is added, and the device is updated. Displaying Static Hosts Tables 1 Open the Static Hosts page. 2 Click Show All. The Static Hosts Table page opens: Figure 6-30. Static Hosts Table Update with your book title 91 - Dell PowerConnect 2848 | User's Guide - Page 92
Show All. The Static Hosts Table page opens. 3 Check the Remove checkbox next to a static host. 4 Click Apply Changes. The host is deleted, and the device is updated. Configuring Address Binding The Address Binding page displays a list of the DHCP server's allocated IP addresses and each IP address - Dell PowerConnect 2848 | User's Guide - Page 93
tree view. Figure 6-32. General Settings • Attribute - The general setting attribute. • Current - The currently configured value. • After Reset - The future (after reset) value. • Jumbo Frames - Enables or disables the Jumbo Frames feature. Jumbo Frames enable the transportation of identical data - Dell PowerConnect 2848 | User's Guide - Page 94
94 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 95
Configuring Device Switching This section provides all system operation and general information for configuring network security, ports, Address tables, GARP, VLANs, Spanning Tree, Port Aggregation, and Multicast Support. Configuring Network Security The device enables network security through both - Dell PowerConnect 2848 | User's Guide - Page 96
• Multiple Session Mode - Enables only the authorized host for multiple-session access to the port. • Guest VLANs - Provides limited network access to unauthorized ports. If a port is denied network access via port-based authorization, but the Guest VLAN is enabled, the port receives limited network - Dell PowerConnect 2848 | User's Guide - Page 97
a RADIUS server is configured, and port authentication is enabled and set to 802.1x multi-session mode. - If the Radius Accept Message doesn't contain the supplicant's VLAN, the supplicant is rejected. - Authenticated ports are added to the supplicant VLAN as untagged. Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 98
not received after the defined period, the authentication process is restarted. The field default is 2 retries. Displaying the Port Based Authentication Table 1 Display the Port Based Authentication page. 2 Click Show All. The Port Based Authentication Table opens: 98 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 99
- Copies port parameters from one port to the selected ports. Select All - Selects all ports in the Port Based Authentication Table. Copying Parameters in the Port Based Authentication Table 1 Open the Port Based Authentication page. 2 Click Show All. The Port Based Authentication Table opens - Dell PowerConnect 2848 | User's Guide - Page 100
, however, the MAC address is not learned. - Discard - Discards the packets from any unlearned source. This is the default value. - Shutdown - Discards the packet from any unlearned source and locks the port. Ports remain locked until they are activated, or the device is reset. • Traps - Enables - Dell PowerConnect 2848 | User's Guide - Page 101
port access. • Number of Violations - The number of packets that arrived on the interface in single-host mode, from a host whose MAC address is not the client (supplicant) MAC address. Displaying the Multiple Hosts Table 1 Open the Multiple Hosts page. 2 Click Show All. The Multiple Hosts Table - Dell PowerConnect 2848 | User's Guide - Page 102
server. - None - The user was not authenticated. • MAC Address - The client (supplicant) MAC address. Displaying the Authenticated Users Table 1 Open the Add User Name page. 2 Click Show All. The Authenticated Users Table opens: Figure 7-6. Authenticated Users Table 102 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 103
open the Ports page, click Switch → Ports. Defining Port Parameters The Port Configuration page contains fields for defining port parameters. To open the Port Configuration page, click Switch → Ports → Port Configuration in the tree view. Figure 7-7. Port Configuration • Port - The port number for - Dell PowerConnect 2848 | User's Guide - Page 104
control on the port. Operates when port is in Full duplex mode. • Current Flow Control - The currently configured Flow Control setting. • MDI/MDIX - Allows the device to decipher between crossed and uncrossed cables. Hubs and switches are deliberately wired opposite the way end stations are wired - Dell PowerConnect 2848 | User's Guide - Page 105
are saved to the device. Displaying the Port Configuration Table: 1 Open the Port Configuration page. 2 Click Show All. The Ports Configuration Table opens: Figure 7-8. Ports Configuration Table Aggregating Ports Load Balancing enables the even distribution of data and/or processing packets - Dell PowerConnect 2848 | User's Guide - Page 106
IP addresses. - Layer 2-3 - Enables load balancing based on static and dynamic MAC addresses, and source and destination IP addresses. • LAG - The LAG number. • LAG Mode - Indicates that the LAG mode is static. • Description (0-64 Characters) - Provides a user-defined description of the configured - Dell PowerConnect 2848 | User's Guide - Page 107
Auto-negotiation is a protocol between two link partners that enables a LAG to advertise its transmission rate and flow control (the flow control default is enabled) abilities to its partner. • Current Auto Negotiation - The currently configured Auto Negotiation setting. • Admin Speed - The speed at - Dell PowerConnect 2848 | User's Guide - Page 108
when the link is set to auto-selection of copper/fiber. The short-reach method is only for a link established at 1 Gigabyte, and is not compatible with Fast Ethernet. To open the Green Ethernet Configuration page, click Switch→ Ports→ Green Ethernet Configuration in the tree view. 108 Update with - Dell PowerConnect 2848 | User's Guide - Page 109
the time period in hours. - Reset - Click to set the Cumulative Power Saved counter back to 0. • Link Down Energy Saving Mode - Indicates whether the Energy-Detect energy saving mode is on or off for the device ports. • Link Short-Reach Energy Saving Mode - Indicates whether the Short-Reach energy - Dell PowerConnect 2848 | User's Guide - Page 110
and Multicast frame rate separately on each port, and discard frames when the rate exceeds a user-defined rate. The Storm Control page provides fields for enabling and configuring Storm Control. To open the Storm Control page, click Switch→ Ports→ Storm Control in the tree view. 110 Update with - Dell PowerConnect 2848 | User's Guide - Page 111
Port - The port from which storm control is enabled. • Broadcast Control - Enables or disables forwarding broadcast packet types on the device. • Mode - Specifies the Broadcast mode Table 1 Open the Storm Control page. 2 Click Show All. The Storm Control Table opens: Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 112
to ports configured to be destination ports: • Ports cannot be configured as a source port. • Ports cannot be a LAG member. • IP interfaces are not configured on the port. • GVRP is not enabled on the port. • The port is not a VLAN member. • Only one destination port can be defined. 112 Update - Dell PowerConnect 2848 | User's Guide - Page 113
ports configured to be source ports: • Source Ports cannot be a LAG member. • Ports cannot be configured as a destination port. • All packets are transmitted tagged from the destination port. • Monitored all RX/TX packets to the same port. To open the Port Mirroring page, click Switch→ Ports→ Port - Dell PowerConnect 2848 | User's Guide - Page 114
Addresses are associated with ports by learning the ports from the frame's source address. Frames addressed to a destination MAC address that is not associated with any port are flooded to all ports of the relevant VLAN. In order to prevent the bridging table from overflowing, dynamic MAC addresses - Dell PowerConnect 2848 | User's Guide - Page 115
select. - Port - Specifies the port numbers for which the table is queried. - LAG - Specifies the LAG for which the table is queried. • MAC Address - Specifies the MAC address for which the table is queried. • VLAN ID - Specifies the VLAN ID for which the table is queried. • Address Table Sort Key - Dell PowerConnect 2848 | User's Guide - Page 116
parameter by which to query the Dynamic Address Table. Entries can be queried by Port, MAC Address, or VLAN ID. 3 Click Query. The Dynamic Address Table is queried. Sorting the Dynamic Address Table 1 Open the Dynamic Address Table. 2 From the Address Table Sort Key drop-down menu, select whether - Dell PowerConnect 2848 | User's Guide - Page 117
mode by which STP is enabled on the device. The possible field values are: - Classic STP - Enables Classic STP on the device. This is the default value. - Rapid STP - Enables Rapid STP on the device. • BPDU Handling - Determines how BPDU packets are managed when STP is disabled on the port/ device - Dell PowerConnect 2848 | User's Guide - Page 118
in a listening and learning state before forwarding packets. The default is 15 seconds. • Bridge ID - Identifies the Bridge priority and MAC address. • Root Bridge ID - Identifies the Root Bridge priority and MAC address. • Root Port - The port number that offers the lowest cost path from this - Dell PowerConnect 2848 | User's Guide - Page 119
STP Port Settings • Select a Port - Port on which STP is enabled. • STP - Enables or disables STP on the port. • Fast Link - When selected, enables Fast Link mode for the port. If Fast Link mode is enabled for a port, the Port State is automatically placed in the Forwarding state when the port link - Dell PowerConnect 2848 | User's Guide - Page 120
are: - Disabled - The port link is currently down. - Blocking - The port is currently blocked and cannot be used to forward traffic or learn MAC addresses. Blocking is displayed when Classic STP is enabled. - Listening - The port is currently in the listening mode. The port cannot forward traffic - Dell PowerConnect 2848 | User's Guide - Page 121
Modify the Priority, Fast Link, Path Cost, and the Fast Link fields. 3 Click Apply Changes. The STP port parameters are modified, and the device is updated. Displaying the STP Port Table 1 Open the STP Port Settings page. 2 Click Show All. The STP Port Table opens. Update with your book title 121 - Dell PowerConnect 2848 | User's Guide - Page 122
Defining STP LAG Settings The STP LAG Settings page contains fields for assigning STP aggregating port parameters. To open the STP LAG Settings page, click Switch→ Spanning Tree→ LAG Settings in the tree view. Figure 7-18. STP LAG Settings • Select a LAG - The user-defined LAG. For more information - Dell PowerConnect 2848 | User's Guide - Page 123
LAG states are: - Disabled - The LAG link is currently down. - Blocking - The LAG is blocked and cannot be used to forward traffic or learn MAC addresses. - Listening - The LAG is in the listening mode and cannot forward traffic or learn MAC addresses. - Learning - The LAG is in the learning - Dell PowerConnect 2848 | User's Guide - Page 124
loops. RSTP has the following port states: • Disabled • Learning • Discarding • Forwarding Rapid Spanning Tree is enabled on the STP Global Settings page. To open the Rapid Spanning Tree (RSTP) page, click Switch→ Spanning Tree→ Rapid Spanning Tree in the tree view. 124 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 125
participating in the Spanning Tree (the port's link is down). • Mode - Displays the STP mode by which STP is enabled on the device. The possible field values are: - Classic STP - Enables Classic STP on the device. This is the default value. - Rapid STP - Enables Rapid STP on the device. • Multiple - Dell PowerConnect 2848 | User's Guide - Page 126
device supports 64 VLANs. All ports must have a defined PVID. If no other value is configured the default VLAN PVID is used. VLAN number 1 is the default VLAN, and cannot be deleted from the system. To open the VLAN Membership page, click Switch→ VLAN→ VLAN Membership in the tree view. 126 Update - Dell PowerConnect 2848 | User's Guide - Page 127
• Show VLAN - Lists and displays specific VLAN information according to VLAN ID or VLAN name. • VLAN Name - The user-defined VLAN name. • Unauthorized Users - Enables or disables unauthorized users from accessing a VLAN. • Remove VLAN - When selected, removes the VLAN from the VLAN Membership Table - Dell PowerConnect 2848 | User's Guide - Page 128
is updated. VLAN Port Membership Table The VLAN Port Membership Table contains a Port Table for assigning ports to VLANs. Ports are assigned VLAN membership by toggling through the Port Control settings. Ports can have the following values: Table 7-1. VLAN Port Membership Table Port Control - Dell PowerConnect 2848 | User's Guide - Page 129
from the drop-down menu. 3 Select a port in the Port Membership Table, and assign the port a value. 4 Click Apply Changes. The port is assigned to the VLAN group, and the device is updated. Deleting a VLAN 1 Open the VLAN Membership page. 2 Click the VLAN ID or VLAN Name option button and select - Dell PowerConnect 2848 | User's Guide - Page 130
VLAN Port Settings page contains fields for managing ports that are part of a VLAN. The port default VLAN ID (PVID) is configured on the VLAN Port Settings page. All untagged packets arriving to the device are tagged by the ports PVID. To open the VLAN Port Settings page, click Switch→ VLAN→ Port - Dell PowerConnect 2848 | User's Guide - Page 131
the VLAN Port Table 1 Open the VLAN Port Settings page. 2 Click Show All. The VLAN Port Table opens. Figure 7-23. VLAN Port Table Defining VLAN LAG Settings The VLAN LAG Setting page provides parameters for managing LAGs that are part of a VLAN. VLANs can either be composed of individual ports or - Dell PowerConnect 2848 | User's Guide - Page 132
a LAG from the LAG drop-down menu and complete the fields on the page. 3 Click Apply Changes. The VLAN LAG parameters are defined, and the device is updated. Displaying the VLAN LAG Table 1 Open the VLAN LAG Setting page. 2 Click Show All. The VLAN LAG Table opens. 132 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 133
speed, set to full-duplex operations. Ports in a LAG, can be of different media types (UTP/Fiber, or different fiber types), provided they operate at the same speed. The device provides LAG Load Balancing based on both source MAC addresses and destination MAC addresses. Aggregated Links are treated - Dell PowerConnect 2848 | User's Guide - Page 134
LAG's properties. If the port cannot be configured with the LAG properties, a trap is generated and the port operates with its default settings. The LAG Membership page contains fields for assigning ports to LAGs. To open the LAG Membership page, click Switch→ Link Aggregation→ LAG Membership in the - Dell PowerConnect 2848 | User's Guide - Page 135
Global Parameters Layer 2 switching forwards Multicast packets to all relevant VLAN ports by default, treating the packet as a Multicast transmission. While this is functional, in the sense that all relevant ports/nodes receive a copy of the frame, it is potentially wasteful as ports/nodes may - Dell PowerConnect 2848 | User's Guide - Page 136
Multicast Group page also assigns ports to a specific Multicast service address group. To open the Bridge Multicast Group page, click Switch→ Multicast Support→ Bridge Multicast Group in the tree view. Figure 7-27. Bridge Multicast Group • VLAN ID - Identifies a VLAN and contains information about - Dell PowerConnect 2848 | User's Guide - Page 137
that can be added to a Multicast service. • LAGs - LAGs that can be added to a Multicast service. The following table contains the IGMP port and LAG members management settings: D The port/LAG has joined the Multicast group dynamically in the Current Row. F The port/LAG is excluded from this - Dell PowerConnect 2848 | User's Guide - Page 138
a neighboring Multicast router/switch. Once IGMP Snooping is enabled, Multicast packets are forwarded to the appropriate port or VLAN. To open the Bridge Multicast Forward All page, click Switch→ Multicast Support→ Bridge Multicast Forward All page in the tree view. 138 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 139
Multicast Forward All • VLAN ID - Identifies a VLAN. • Ports - Ports that can be added to a Multicast service. • LAGs - LAGs that can be added to a Multicast service. The contains the settings for managing router and port settings. Port Control F S Blank Definition The port/LAG is excluded from - Dell PowerConnect 2848 | User's Guide - Page 140
router or switch. Attaching a LAG to a Multicast Router or Switch 1 Open Bridge Multicast Forward All page. 2 Define the VLAN ID field. 3 Select a port in the LAGs table, and assign the LAG a value. 4 Click Apply Changes. The LAG is attached to the Multicast router or switch. 140 Update with your - Dell PowerConnect 2848 | User's Guide - Page 141
router. • Querier IP Address - IP address of the IGMP Querier. Use either use the VLAN's IP Interface address or define a unique IP address which will be used as a source address of Querier. • Host Timeout (1-2147483647) - Time before an IGMP snooping entry is aged out. The default time is 260 - Dell PowerConnect 2848 | User's Guide - Page 142
the VLAN ID for the device on which IGMP snooping needs to be enabled. 3 Select Enable in the IGMP Snooping Status field. 4 Complete the fields on the page. 5 Click Apply Changes. IGMP snooping is enabled on the device. Displaying the IGMP Snooping Table 1 Open the IGMP Snooping. 2 Click Show All - Dell PowerConnect 2848 | User's Guide - Page 143
Viewing Statistics The Statistic pages contains links to device information for RMON, and CPU utilization. 8 Update with your book title 143 - Dell PowerConnect 2848 | User's Guide - Page 144
RMON Statistics Group page contains fields for viewing information about device utilization and errors that occurred on the device. To open the RMON Statistics Group page, click Statistics/RMON→ RMON→ Statistics in the tree view. Figure 8-1. RMON Statistics Group 144 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 145
of xx-byte frames received on the interface since the device was last refreshed. Viewing Interface Statistics 1 Open the RMON Statistics Group page. 2 Select an interface type and number in the Interface field. The interface statistics are displayed. Viewing Charts The Chart page contains links for - Dell PowerConnect 2848 | User's Guide - Page 146
view. Figure 8-2. CPU Utilization The CPU Utilization page contains the following information: • Refresh Rate - Amount of time that passes before the statistics are refreshed. 146 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 147
Queue Mapping Table Default values CoS Value 0 1 2 3 4 5 6 7 Forwarding Queue Values q2 q1 q1 q2 q3 q3 q4 q4 Packets arriving untagged are assigned a default VPT that is set on a per port basis. The assigned VPT is used to map the packet to the output queue and as the egress VPT. 9 Update with - Dell PowerConnect 2848 | User's Guide - Page 148
to Queue Mapping Table Default Values DSCP Value 0-15 16-31 32-47 48-63 Forwarding Queue Values q1 q2 q3 q4 DSCP mapping is enabled on a per-system basis. CoS Services After packets are assigned to a specific queue, CoS services can be assigned to the queue(s). Output queues are configured with - Dell PowerConnect 2848 | User's Guide - Page 149
by the IEEE802.1p VLAN priority tag (VPT) or by the default VPT assigned to a port. - DSCP - The output queue assignment is determined by the DSCP field. Interface Trust settings override the global Trust mode setting. Enabling Quality of Service: 1 Open the CoS Settings page. 2 Select Enable in - Dell PowerConnect 2848 | User's Guide - Page 150
• Interface - The specific port or LAG to configure. • Disable "Trust" Mode on Interface - Disables the Trust mode on the specified interface. This setting overrides the Trust mode configured on the device globally. • Set Default CoS For Incoming Traffic To - Sets the default CoS value for packets - Dell PowerConnect 2848 | User's Guide - Page 151
Show All. The QoS Interface Settings Table page opens: Figure 9-3. QoS Interface Settings Table Defining Queue Settings The QoS Queue Settings page contains fields for configuring the scheduling method by which the queues are maintained. To open the QoS Queue Settings page click Quality of Service - Dell PowerConnect 2848 | User's Guide - Page 152
if traffic scheduling is based on the Weighted Round Robin (WRR) weights to egress queues. The default values are: - 8 for Queue 1 - 4 for Queue 2 - 2 for Queue 3 Queue Settings page. 2 Define the fields. 3 Click Apply Changes. The queue settings are defined, and the device is updated. 152 Update - Dell PowerConnect 2848 | User's Guide - Page 153
Table • Class of Service - Specifies the CoS priority tag values, where zero is the lowest value and 7 is the highest value. • Queue - The traffic forwarding queue to which the CoS priority is mapped. Four traffic priority queues are supported. • Restore Defaults - Restores the device factory - Dell PowerConnect 2848 | User's Guide - Page 154
for defining output queue to specific DSCP fields. For the list of the DSCP default queue settings, see "DSCP to Queue Mapping Table Default Values" on page 148. To open the DSCP to Queue page, click Quality of Service→ CoS Global Parameters→ DSCP to Queue in the tree view. Figure 9-6. DSCP to Queue - Dell PowerConnect 2848 | User's Guide - Page 155
1 Open the DSCP to Queue page. 2 Check the Restore Defaults checkbox. 3 Click Apply Changes. The default values are restored. Update with your book title 155 - Dell PowerConnect 2848 | User's Guide - Page 156
156 Update with your book title - Dell PowerConnect 2848 | User's Guide - Page 157
CLI commands. For information about configuring an initial IP Address, see "Static IP Address and Subnet Mask." NOTE: Ensure the client is loaded, before using the CLI. NOTE: CLI can be used to manage the device only when the device is in Managed mode. For more information about management modes - Dell PowerConnect 2848 | User's Guide - Page 158
Run window, type Telnet in the Open field. 3 Click OK to begin the Telnet session. Using the CLI This section provides information for using the CLI. Command Mode Overview The CLI is divided into command modes. Each command mode has a specific command set. Entering a question mark at - Dell PowerConnect 2848 | User's Guide - Page 159
config) and the pound sign #. console(config)# To list the Global Configuration commands, enter a question mark at the command prompt. To return from Global Configuration mode to Privileged EXEC mode, type the exit command or use the command. Dell PowerConnect 28xx Systems User Guide 159 - Dell PowerConnect 2848 | User's Guide - Page 160
1 Console (config-if)# Port Channel Mode The Port Channel mode contains commands for configuring Link Aggregation Groups (LAG). The following is an example of the Port Channel mode prompt: Console (config)# interface port-channel 1 Console (config-if)# 160 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 161
An out-of-band IP address can be specified as described in the usage guidelines. Source for the file from a serial connection that uses the Xmodem protocol. Null destination for copies or files. You can copy a remote file to null to determine its size. Dell PowerConnect 28xx Systems User Guide 161 - Dell PowerConnect 2848 | User's Guide - Page 162
a row typically mean that the copy process may fail. Command: debug-mode To switch to debug mode, use the debug-mode command in Privileged EXEC mode. debug-mode Syntax Description This command has no arguments or keywords. Command Mode Privileged EXEC 162 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 163
setting. Example Console(config-if)# end Console# Command: exit (configuration) To exit any configuration mode to the next highest mode in the CLI mode hierarchy, use the exit command in any configuration mode. exit Syntax Description This command has no arguments or key words Dell PowerConnect - Dell PowerConnect 2848 | User's Guide - Page 164
value This command has no default setting. Example Console> exit Command: help To display a brief description of the help system, enter the help command. help Syntax Description This command has no arguments or key words Command Mode All command modes. 164 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 165
Command Modes Global configuration Usage Guidelines Commands under the interface range context are executed independently on each interface in the range: If the command returns an error on one of the interfaces, it will not stop the execution of the command on other interfaces. Dell PowerConnect - Dell PowerConnect 2848 | User's Guide - Page 166
131.108.1.27 255.255.255.0 Command: ip address To set the IP address of a device interface, use the ip address interface configuration command. ip address ip-address Syntax Description • ip-address - The IP address to be assigned to the interface. 166 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 167
gateway ip-address no ip default-gateway Syntax Description ip-address - IP address of the default gateway. Parameters range ip-address - Valid IP address Defaults No default gateway is defined. Command Modes Global configuration Interface configuration Command: login To change a login username, use - Dell PowerConnect 2848 | User's Guide - Page 168
range • hostname - 1 - 158 characters (Max label size: 63) • packet_size - IPv4: 56 - 1472 • packet_count - 0 - 65535 • time_out - 50 - 65535 Command Mode EXEC Default value This command has no default setting. Usage Guidelines Press Esc to stop pinging. Following are sample results of the ping - Dell PowerConnect 2848 | User's Guide - Page 169
. Command Modes Privileged EXEC Default value This command has no default setting. Command: show tech-support command To display system and configuration information you can provide to the Technical Assistance Center when reporting a problem, use the show tech-support command. Dell PowerConnect - Dell PowerConnect 2848 | User's Guide - Page 170
version show system mode show ip interface show interfaces configuration show interfaces status show interfaces port-channel show vlan show interfaces switchport show spanning tree show bridge multicast address-table show ip igmp snooping groups show dot1x show dot1x users 170 Dell PowerConnect - Dell PowerConnect 2848 | User's Guide - Page 171
SNMP administrator access • ipv4-address - Management station IPv4 address. Default is all IP addresses. Parameters range • community - 1 - 20 chars • ip-address - Valid IP address Default No community is defined Command Mode Global configuration Dell PowerConnect 28xx Systems User Guide 171 - Dell PowerConnect 2848 | User's Guide - Page 172
from another device configuration. Parameters range • name - 1 - 20 characters. • password - 1 - 159 • level - 1 - 15 Default No user is defined. Command modes Global Configuration Example Console (config)# username bob password lee privilege 15 172 Dell PowerConnect 28xx Systems User Guide - Dell PowerConnect 2848 | User's Guide - Page 173
IP subnets ARP Address Resolution Protocol. A TCP/IP protocol that converts IP addresses into physical addresses. ASIC Application Specific Integrated Circuit. A custom chip designed for a specific application. Asset Tag Specifies the user-defined device reference. Authentication Profiles Sets - Dell PowerConnect 2848 | User's Guide - Page 174
information on ports, addresses, priorities, and forwarding costs. Bridge A device that connect two networks. Bridges are hardware specific, however they are protocol independent. Bridges operate at Layer 1 and Layer 2 levels. Broadcast Domain Devices sets that receive broadcast frames originating - Dell PowerConnect 2848 | User's Guide - Page 175
CLI Command Line Interface. A set of line commands used to configure the system. Communities Specifies a group of users which retains the same system access rights. CPU Central Processing Unit. The part of a computer that processes information. - Dell PowerConnect 2848 | User's Guide - Page 176
Ethernet packets smaller than 576 bits. Frame Packets containing the header and trailer information VLANs. H HOL Head of Line. Packets are queued. Packets at the head of the queue are forwarded before packets at the end of the line. Host A computer that acts as a source of information or services - Dell PowerConnect 2848 | User's Guide - Page 177
Enables transporting the identical data in fewer frames. Jumbo Frames reduce overhead, lower processing time, and ensures fewer interrupts. L LAG Link Aggregated Group. Aggregates ports or VLANs into a single virtual port or VLAN. For more information on LAGs, see Defining LAG Membership. LAN Local - Dell PowerConnect 2848 | User's Guide - Page 178
are forwarded to every bridge interface. MAC Address Learning minimizes traffic on the attached LANs. MAC Layer A sub-layer of the Data Link Control (DTL) layer. Mask A filter that includes or excludes certain values, for example parts of an IP address. For example, Unit 2 is inserted in the - Dell PowerConnect 2848 | User's Guide - Page 179
it. P Packets Blocks of information for transmission in packet switched systems. PDU Protocol Data Unit. A data unit specified in a layer protocol consisting of protocol control information and layer user data. PING Packet Internet Groper. Verifies if a specific IP address is available. A packet - Dell PowerConnect 2848 | User's Guide - Page 180
one path between end stations on a network, eliminating loops. Startup Configuration Retains the exact device configuration when the device is powered down or rebooted. Subnet Sub-network. Subnets are portions of a network that share a common address component. On TCP/IP networks, devices that - Dell PowerConnect 2848 | User's Guide - Page 181
. Trunking Link Aggregation. Optimizes port usage by linking a group of ports together to form a single trunk (aggregated groups). U UDP User Data Protocol. Transmits packets but does not guarantee their delivery. Unicast A form of routing that transmits one packet to one user. V VLAN Virtual - Dell PowerConnect 2848 | User's Guide - Page 182
182 Glossary - Dell PowerConnect 2848 | User's Guide - Page 183
Cables, 65, 67 CIDR, 174 Command Mode Overview, 158 Community table, 76 CoS, 150 D Defining device information, 59 Device installation, 30 Device representation, 54 Device view, 53-54 DHCP, 15 Dimensions, 21 Downloading software, 80 DSCP, 147, 175 DVMRPl, 175 Dynamic Address List, 115 Dynamic VLAN - Dell PowerConnect 2848 | User's Guide - Page 184
177 Ingress, 177 Interface mode, 160 Internetwork Packet Exchange, 177 IP, 177 IPM, 177 IPX, 177 ISIS, 177 J Jumbo frames, 177 L L2TP, 177 LAG, 106, 177 LAGs, 138 Local User Database, 69 Loops, 116 M MAC Address, 178 MAC address, 114 Management Information Base., 178 Management security, 69 Master - Dell PowerConnect 2848 | User's Guide - Page 185
Time Domain Reflectometry, 65 Tree view, 53 Trivial File Transfer Protocol, 181 Trunk Configuration Page, 106 Trust, 150 VLAN membership, 126 VLAN Port Membership Table, 128 VLAN priority, 147 VLANs, 126 W Web management system icons, 55 Weighted Round Robin, 151 Width, 21 U UDP, 181 Understanding - Dell PowerConnect 2848 | User's Guide - Page 186
186 Index
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