This document provides basic information about the Dell N20xx/N30xx
Series switches, including how to install a switch and perform the initial
configuration. For information about how to configure and monitor switch
features, see the User’s Configuration Guide, which is available on the Dell
Support website at dell.com/support/manuals, for the latest updates on
documentation and firmware.
This document contains the following sections:
•N20xx Series Overview
•N20xx Series Hardware Overview
•N20xx Series Installation
•Starting and Configuring the N20xx Switch
•N30xx Series Overview
•N30xx Series Hardware Overview
•N30xx Series Installation
•Starting and Configuring the N30xx Switch
NOTE: Switch administrators are strongly advised to maintain Dell Networking
switches on the latest version of the Dell Networking Operating System (DNOS).
Dell Networking continually improves the features and functions of DNOS based on
feedback from you, the customer. For critical infrastructure, prestaging of the new
release into a noncritical portion of the network is recommended to verify network
configuration and operation with the new DNOS version.
N20xx Series Overview
The Dell N20xx switches are stackable Layer 2 Gigabit Ethernet switches and
include the following models:
•Dell N2024
•Dell N2024P
•Dell N2048
•Dell N2048P
Getting Started Guide7
N20xx Series Hardware Overview
48 10/100/1000BASE-T Ports
SFP+
Ports
Console Port
USB Port
This section contains information about device characteristics and modular
hardware configurations for the N20xx Series switches.
All N20xx non-PoE models are 1U, rack-mountable switches with the
following physical dimensions:
•440.0 x 257.0 x 43.5 mm (W x D x H).
•17.3 x 10.1 x 1.7 inches (W x D x H).
All N20xx PoE models are 1U, rack-mountable switches with the following
physical dimensions:
•440.0 x 387.0 x 43.5 mm (W x D x H).
•17.3 x 15.2 x 1.7 inches (W x D x H).
N20xx Series Front Panel
The following images show the front panels of the switch models in the
N20xx Series.
Figure 1-1. N2048 Series with 48 10/100/1000BASE-T Ports (Front Panel)
In addition to the switch ports, the front panel of each model in the N20xx
series includes the following ports:
•Console port
•USB port
8Getting Started Guide
Figure 1-2. N2024 Close-up
The N20xx front panel, shown in Figure 1-2, has status LEDs for overtemperature alarm, internal power, and status on the top row. The bottom
row of status LEDs displays stack master, redundant power supply (RPS)
status and fan alarm status.
Figure 1-3. N2024P Close-up
The N20xxP front panel, shown in Figure 1-3, has status LEDs for overtemperature alarm, internal power and status on the top row. The bottom row
of status LEDs displays stack master, modular power supply (MPS) status and
fan alarm status.
Getting Started Guide9
Switch Ports
The N2024/N2024P front panel provides 24 Gigabit Ethernet
(10/100/1000BASE-T) RJ-45 ports that support auto-negotiation for speed,
flow control, and duplex. The N2024/N2024P models support two SFP+ 10G
ports. Dell-qualified SFP+ transceivers are sold separately.
The N2048/N2048P front panel provides 48 Gigabit Ethernet (10BASE-T,
100BASE-TX, 1000BASE-T) RJ-45 ports that support auto-negotiation for
speed, flow control, and duplex. The N2048/N2048P support two SFP+ 10G
ports. Dell-qualified SFP+ transceivers are sold separately.
The front-panel switch ports have the following characteristics:
•The switch automatically detects the difference between crossed and
straight-through cables on RJ-45 ports and automatically chooses the MDI
or MDIX configuration to match the other end.
•SFP ports support Dell-qualified transceivers.
•RJ-45 ports support full-duplex mode 10/100/1000 Mbps speeds on
standard Category 5 UTP cable.
•SFP+ ports support SFP+ transceivers and SFP+ copper twin-ax
technology plus SFP transceivers operating at 1G.
•The N2024P/N2048P front panel ports support PoE (15.4W) and PoE+
(30W).
Console Port
The console port provides serial communication capabilities, which allows
communication using RS-232 protocol. The serial port provides a direct
connection to the switch and allows access to the CLI from a console
terminal connected to the port through the provided serial cable (with RJ45
YOST to female DB-9 connectors).
The console port is separately configurable and can be run as an asynchronous
link from 1200 baud to 115,200 baud.
The Dell CLI only supports changing the speed. The defaults are 9600 baud
rate, 8 data bits, No Parity, 1 Stop Bit, No Flow Control.
10Getting Started Guide
USB Port
The Type-A, female USB port supports a USB 2.0-compliant flash memory
drive. The Dell Networking switch can read or write to a flash drive formatted
as FAT-32. You can use a USB flash drive to copy switch configuration files
and images between the USB flash drive and the switch. You can also use the
USB flash drive to move and copy configuration files and images from one
switch to other switches in the network.
The USB port does not support any other type of USB device.
Reset Button
The reset button is accessed through the pinhole and allows you to perform a
hard reset on the switch. To use the reset button, insert an unbent paper clip
or similar tool into the pinhole. When the switch completes the boot process
after the reset, it resumes operation with the most recently saved
configuration. Any changes made to the running configuration that were not
saved to the startup configuration prior to the reset are lost.
Port and System LEDs
The front panel contains light emitting diodes (LEDs) that indicate the
status of port links, power supplies, fans, stacking, and the overall system
status.
For information about the status that the LEDs indicate, see the User’s
Configuration Guide.
Stack Master LED and Stack Number Display
When a switch within a stack is the master unit, the stack master LED, which
is labeled M, is solid green. If the M LED is off, the stack member is not the
master unit. The Stack No. panel displays the unit number for the stack
member. If a switch is not part of a stack (in other words, it is a stack of one
switch), the M LED is illuminated, and the unit number is displayed.
Getting Started Guide11
N20xx Series Back Panel
Fan Vents
AC Power Receptacle
Mini-SAS stacking ports
The following images show the back panels of the N20xx switches.
Figure 1-4. N20xx Back Panel
Figure 1-5. N2024P/N2048P Back Panel
The term mini-SAS refers to the stacking port cable connections shown in
Figure 1-6. See Stacking Multiple N20xx Switches for information on using
the mini-SAS ports to connect switches.
Figure 1-6. N2048 Mini-SAS Stacking Ports and Fans
Power Supplies
N2024 and N2048
N2024 and N2048 switches have an internal 100-watt power supply. The
additional redundant power supply (Dell Networking RPS720) provides 180
watts of power and gives full redundancy for the switch.
12Getting Started Guide
N2024P and N2048P
Dell Networking N2024P and N2048P switches have an internal 1000-watt
power supply feeding up to 24 PoE devices at full PoE+ power (850W). An
additional external power supply (MPS1000) provides 1000 watts and gives
full power coverage for all 48 PoE devices (1800W).
NOTE: PoE power is dynamically allocated. Not all ports will require the full PoE+
power.
CAUTION: Remove the power cable from the power supplies prior to removing
the power supply module itself. Power must not be connected prior to insertion in
the chassis.
Ventilation System
Two fans cool the N20xx switches.
N20xx Model Summary
Table 1-1. N20xx Model Summary
Marketing
Model
Name
N202424x1G/2x10G SFP+/2x
N2024P24x1G/2x10G SFP+/2x
N204848x1G/2x10G SFP+/2x
N2048P48x1G/2x10G SFP+/2x
DescriptionPower
Stacking
Stacking/24x PoE+ Ports
Stacking
Stacking/48x PoE+ Ports
Regulatory
Supply
Unit
100WE04WE04W001
1000WE05WE05W001
100WE04WE04W002
1000WE05WE05W002
Model Number
Getting Started Guide13
Regulatory
Ty pe
Number
N20xx Series Installation
Site Preparation
N20xx Series switches can be mounted in a standard 48.26 cm (19-inch) rack
or placed on a flat surface.
Make sure that the chosen installation location meets the following site
requirements:
•
Power
— The switch is installed near an easily accessible 100–240 VAC,
50–60 Hz outlet.
•
Clearance
access. Allow clearance for cabling, power connections, and ventilation.
•
Cabling
as radio transmitters, broadcast amplifiers, power lines, and fluorescent
lighting fixtures.
•
Ambient Temperature
range is 0 to 45ºC (32 to 113ºF) at a relative humidity of up to 95 percent,
non-condensing.
NOTE: Decrease the maximum temperature by 1°C (1.8°F) per 300 m (985 ft.) above
•
Relative Humidity
(noncondensing) with a maximum humidity gradation of 10% per hour.
— There is adequate front and rear clearance for operator
— The cabling is routed to avoid sources of electrical noise such
— The ambient switch operating temperature
900m (2955 ft.).
— The operating relative humidity is 8% to 85%
14Getting Started Guide
Unpacking the N20xx Switch
Package Contents
When unpacking each switch, make sure that the following items are
included:
•One Dell Networking switch
•One RJ-45 to DB-9 female cable
•One rack-mount kit (N20xx) for rack installation, two mounting brackets,
bolts, and cage nuts
•One set of self-adhesive rubber pads for the free-standing switch (four pads
are included)
Unpacking Steps
NOTE: Before unpacking the switch, inspect the container and immediately report
any evidence of damage.
1
Place the container on a clean, flat surface and cut all straps securing the
container.
2
Open the container or remove the container top.
3
Carefully remove the switch from the container and place it on a secure
and clean surface.
4
Remove all packing material.
5
Inspect the product and accessories for damage.
Rack Mounting a N20xx Switch
WARNING: Read the safety information in the Safety and Regulatory Information
as well as the safety information for other switches that connect to or support the
switch.
The AC power connector is on the back panel of the switch.
Installing in a Rack
WARNING: Do not use rack mounting kits to suspend the switch from under a
table or desk, or attach it to a wall.
Getting Started Guide15
CAUTION: Disconnect all cables from the switch before continuing. Remove all
self-adhesive pads from the underside of the switch, if they have been attached.
CAUTION: When mounting multiple switches into a rack, mount the switches
from the bottom up.
1
Place the supplied rack-mounting bracket on one side of the switch,
ensuring that the mounting holes on the switch line up to the mounting
holes in the rack-mounting bracket. Figure 1-7 illustrates where to mount
the brackets.
Figure 1-7. Attaching the Brackets
2
Insert the supplied bolts into the rack-mounting holes and tighten with a
screwdriver.
3
Repeat the process for the rack-mounting bracket on the other side of the
switch.
4
Insert the switch into the 48.26 cm (19 inch) rack, ensuring that the rackmounting holes on the switch line up to the mounting holes in the rack.
5
Secure the switch to the rack with either the rack bolts or cage nuts and
cage-nut bolts with washers (depending on the kind of rack you have).
Fasten the bolts on bottom before fastening the bolts on top.
CAUTION: Make sure that the supplied rack bolts fit the pre-threaded holes in the
rack.
NOTE: Make sure that the ventilation holes are not obstructed.
16Getting Started Guide
Installing as a Free-standing Switch
NOTE: We strongly recommend mounting the switch in a rack.
Install the switch on a flat surface if you are not installing it in a rack. The
surface must be able to support the weight of the switch and the switch
cables. The switch is supplied with four self-adhesive rubber pads.
1
Attach the self-adhesive rubber pads on each location marked on the
bottom of the switch.
2
Set the switch on a flat surface, and make sure that it has proper
ventilation by leaving 5 cm (2 inches) on each side and 13 cm (5 inches) at
the back.
Stacking Multiple N20xx Switches
You can stack N20xx switches up to 12 switches high using the mini-SAS
ports located on the rear of the switch. N20xx switches support stacking only
with other N20xx series switches. When multiple switches are connected
together through the stack ports, they operate as a single unit with up to 576
front panel ports. The stack operates and is managed as a single entity.
NOTE: If you are installing a stack of switches, you need to assemble and cable the
stack before powering up and configuring it. When a stack is powered up for the
first time, the switches elect a Master Switch, which may occupy any location in
the stack. The Master LED on the front panel is illuminated on the master unit.
Creating a Switch Stack
Create a stack by connecting adjacent units using the mini-SAS stacking
ports on the back panel of the switch. Figure 1-8 on page 18 shows the
switches connected in a ring topology, which is the recommended topology
for a stack.
1
Connect one of the mini-SAS cables into either of the stacking ports of the
top switch and the switch directly below it.
If necessary, use a separately purchased, longer (1 meter or 3 meter) miniSAS cable to connect the switches.
2
Repeat this process until all of the devices are connected.
3
Use the remaining stacking cable to connect the two remaining stacking
ports together so that a ring topology is assembled.
Getting Started Guide17
Unit 1
Unit 2
Unit 3
Figure 1-8. Connecting a Stack of Switches
The stack in Figure 1-8 is connected in a ring topology and has the following
physical connections between the switches:
•The bottom mini-SAS port on Unit 1 is connected to the top mini-SAS
port on Unit 2.
•The bottom mini-SAS port on Unit 2 is connected to the top mini-SAS
port on Unit 3.
•The bottom mini-SAS port on Unit 3 is connected to the top mini-SAS
port on Unit 1.
18Getting Started Guide
Stacking Standby
The stacking feature supports a Standby or backup unit that assumes the
Master unit role if the Master unit in the stack fails. As soon as a Master
failure is detected in the stack, the Standby unit initializes the control plane
and enables all other stack units with the current configuration. The Standby
unit maintains a synchronized copy of the running configuration for the
stack. The Standby unit is automatically selected in the stack; however, you
can use the CLI to select a different stack member as Standby. See the User’s Configuration Guide or the CLI Reference Guide for more information.
Getting Started Guide19
StartingandConfiguringtheN20xx
Switch
The following flow chart provides an overview of the steps you use to perform
the initial configuration after the switch is unpacked and mounted.
Figure 1-9. Installation and Configuration Flow Chart
20Getting Started Guide
Connecting a N20xx Switch to a Terminal
After completing all external connections, connect a terminal to a switch to
configure the switch.
NOTE: Read the Release Notes for this product before proceeding. You can
download the Release Notes from the Dell Support website at
dell.com/support/manuals.
NOTE: We recommend that you obtain the most recent version of the user
documentation from the Dell Support website at dell.com/support/manuals.
To monitor and configure the switch via serial console, use the console port
on the front panel of the switch (see Figure 1-1 on page 8) to connect it to a
VT100 terminal or to a computer running VT100 terminal emulation
software. The console port is implemented as a data terminal equipment
(DTE) connector.
The following equipment is required to use the console port:
•VT100-compatible terminal or a computer with a serial port running
VT100 terminal emulation software,
•A serial cable (provided) with an RJ-45 connector for the console port and
DB-9 connector for the terminal.
Perform the following tasks to connect a terminal to the switch console port:
1
Connect the DB-9 connector on the serial cable to the terminal or
computer running VT100 terminal emulation software.
2
Configure the terminal emulation software as follows:
a
Select the appropriate serial port (for example, COM 1) to connect to
the console.
b
Set the data rate to 9600 baud.
c
Set the data format to 8 data bits, 1 stop bit, and no parity.
d
Set the flow control to none.
e
Set the terminal emulation mode to
f
Select Terminal keys for Function, Arrow, and Ctrl keys. Make sure
that the setting is for Terminal keys (not Microsoft Windows keys).
such as Microsoft HyperTerminal.
VT100
.
Getting Started Guide21
3
Console Port
Connect the RJ-45 connector on the cable directly to the switch console
port. The Dell Networking console port is located on the right side of the
front panel and is labeled with a
|O|O|
symbol, as shown in Figure 1-10
on page 22.
NOTE: Serial console access to the stack manager is available from any
serial port via the local CLI. Only one serial console session at a time is
supported.
Figure 1-10. N2024P Front Panel with Console Port
Connecting a N20xx Switch to a Power Source
CAUTION: Read the safety information in the Safety and Regulatory Information
manual as well as the safety information for other switches that connect to or
support the switch.
All N20xx models have one internal power supply. The
on the back panel.
power receptacles are
AC and DC Power Connection
1
Make sure that the switch console port is connected to a VT100 terminal
or VT100 terminal emulator via the RJ-45 to DB-9 female cable.
2
Using a 5-foot (1.5 m) standard power cable with safety ground connected,
connect the power cable to the AC main receptacle located on the back
panel (see Figure 1-11 on page 23).
3
Connect the power cable to a grounded AC outlet.
22Getting Started Guide
4
To DC Power Source (Optional)
To AC Power Source
If you are using a redundant or external DC power supply, such as the Dell
Networking RPS720 or Dell Networking MPS1000, connect the DC power
cable to the DC receptacle located on the back panel. In Figure 1-11 on
page 23, the redundant power supply feed is in the middle and is labeled
RPS.
Figure 1-11. AC and DC Power Connection to an N2048 Switch
Booting the N20xx Switch
When the power is turned on with the local terminal already connected, the
switch goes through a power-on self-test (POST). POST runs every time the
switch is initialized and checks hardware components to determine if the
switch is fully operational before completely booting. If POST detects a
critical problem, the program flow stops. If POST passes successfully, valid
firmware is loaded into RAM. POST messages are displayed on the terminal
and indicate test success or failure. The boot process runs for approximately
60 seconds.
You can invoke the Boot menu after the first part of the POST is completed.
From the Boot menu, you can perform configuration tasks such as resetting
the system to factory defaults, activating the backup image, or recovering a
password. For more information about the Boot menu functions, see the CLI Reference Guide.
Getting Started Guide23
Performing the N20xx Initial Configuration
The initial configuration procedure is based on the following assumptions:
•The Dell Networking switch was never configured before.
•The Dell Networking switch booted successfully.
•The console connection was established, and the
prompt appears on the screen of a VT100 terminal or terminal equivalent.
The initial switch configuration is performed through the console port. After
the initial configuration, you can manage the switch from the alreadyconnected console port or remotely through an interface defined during the
initial configuration.
NOTE: The switch is not configured with a default user name, password, or IP
address.
Before setting up the initial configuration of the switch, obtain the following
information from your network administrator:
•The IP address to be assigned to the management interface.
•The IP subnet mask for the network.
•The IP address of the management interface default gateway.
These settings are necessary to allow the remote management of the switch
through Telnet (Telnet client) or HTTP (Web browser).
Enabling Remote Management
On the N20xx switches, you can use any of the switch ports on the front panel
for in-band management. By default, all in-band ports are members of VLAN
1.
The Dell Easy Setup Wizard includes prompts to configure network
information for the VLAN 1 interface on the N20xx switch. You can assign a
static IP address and subnet mask or enable DHCP and allow a network
DHCP server to assign the information.
See the CLI Reference Guide for information about the CLI commands you
use to configure network information.
Dell Easy Setup Wizard
24Getting Started Guide
Initial Configuration Procedure
You can perform the initial configuration by using the Dell Easy Setup
Wizard or by using the CLI. The wizard automatically starts when the switch
configuration file is empty. You can exit the wizard at any point by entering
[ctrl+z], but all configuration settings specified will be discarded, and the
switch will use the default values.
NOTE: If you do not run the Dell Easy Setup Wizard or do not respond to the initial
Easy Setup Wizard prompt within 60 seconds, the switch enters CLI mode. You must
reset the switch with an empty startup configuration in order to rerun the Dell Easy Setup Wizard.
For more information about performing the initial configuration by using the
CLI, see the CLI Reference Guide. This Getting Started Guide shows how to
use the Dell Easy Setup Wizard for initial switch configuration. The wizard
sets up the following configuration on the switch:
•Establishes the initial privileged user account with a valid password. The
wizard configures one privileged user account during the setup.
•Enables CLI login and HTTP access to use the local authentication setting
only.
•Sets up the IP address for the VLAN 1 routing interface, of which all
in-band ports are members.
•Sets up the SNMP community string to be used by the SNMP manager at
a given IP address. You may choose to skip this step if SNMP management
is not used for this switch.
•Allows you to specify the network management system IP address or
permit management access from all IP addresses.
•Configures the default gateway IP address for the VLAN 1 interface.
Getting Started Guide25
Example Session
This section describes a Dell Easy Setup Wizard session. The following
values are used by the example session:
•The SNMP community string to be used is
•The network management system (NMS) IP address is
•The user name is
admin
, and the password is
•The IP address for the VLAN 1 routing interface is
subnet mask of
•The default gateway is
255.255.255.0
10.1.1.1
.
The setup wizard configures the initial values as defined above. After
completing the wizard, the switch is configured as follows:
•SNMPv2 is enabled and the community string is set up as defined above.
SNMPv3 is disabled by default.
•The admin user account is set up as defined.
•A network management system is configured. From the management
station, you can access the SNMP, HTTP, and CLI interfaces. You may also
choose to allow all IP addresses to access these management interfaces by
choosing the (0.0.0.0) IP address.
•An IP address is configured for the VLAN 1 routing interface.
•A default gateway address is configured.
public
.
admin123
10.1.2.100
.
10.1.1.200
.
with a
NOTE: In the example below, the possible user options or default values are
enclosed in [ ]. If you press <Enter> with no options defined, the default value is
accepted. Help text is in parentheses.
26Getting Started Guide
Dell Easy Setup Wizard Console Example
The following example contains the sequence of prompts and responses
associated with running an example Dell Easy Setup Wizard session, using
the input values listed above.
After the switch completes the POST and is booted, the following dialog
appears:
Unit 1 - Waiting to select management unit)>
Applying Global configuration, please wait...
Welcome to Dell Easy Setup Wizard
The Setup Wizard guides you through the initial switch
configuration, and gets you up and running as quickly
as possible. You can skip the setup wizard, and enter
CLI mode to manually configure the switch. You must
respond to the next question to run the setup wizard
within 60 seconds, otherwise the system will continue
with normal operation using the default system
configuration. Note: You can exit the setup wizard at
any point by entering [ctrl+z].
Would you like to run the setup wizard (you must
answer this question within 60 seconds)? [Y/N] y
Step 1:
The system is not set up for SNMP management by
default. To manage the switch using SNMP (required for
Dell Network Manager) you can
.Set up the initial SNMP version 2 account now.
.Return later and set up other SNMP accounts. (For
more information on setting up an SNMP version 1 or
3 account, see the user documentation).
Would you like to set up the SNMP management interface
now? [Y/N] y
To set up the SNMP management account you must specify
the management system IP address and the “community
string” or password that the particular management
system uses to access the switch. The wizard
Getting Started Guide27
automatically assigns the highest access level
[Privilege Level 15] to this account. You can use Dell
Network Manager or other management interfaces to
change this setting, and to add additional management
system information later. For more information on
adding management systems, see the user documentation.
To add a management station:
Please enter the SNMP community string to be used.
[public]: public
NOTE: If it is configured, the default access level is set to the highest available
access for the SNMP management interface. Initially only SNMPv2 will be
activated. SNMPv3 is disabled until you return to configure security access for
SNMPv3 (e.g. engine ID, view, etc.).
Please enter the IP address of the Management System
(A.B.C.D) or wildcard (0.0.0.0) to manage from any
Management Station. [0.0.0.0]: 10.1.2.100
Step 2:
Now we need to set up your initial privilege (Level
15) user account. This account is used to login to the
CLI and Web interface. You may set up other accounts
and change privilege levels later. For more
information on setting up user accounts and changing
privilege levels, see the user documentation.
To set up a user account:
Please enter the user name. [root]:admin
Please enter the user password: ********
Please reenter the user password: ********
Step 3:
Next, an IP address is set up on the VLAN 1 routing
interface.
You can use the IP address to access the CLI, Web
interface, or SNMP interface of the switch.
28Getting Started Guide
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