NETGEAR M4100 Series ProSAFE User guide

350 East Plumeria Drive
San Jose, CA 95134
USA
March 2015
208-10793-02
M4100 Series Switches
Software Setup Manual
Software Version 10.0.2

2
M4100 Series Switches
Support
Thank you for selecting NETGEAR products.
After installing your device, locate the serial number on the label of your product and use it to register your product at
https://my.netgear.com. You must register your product before you can use NETGEAR telephone support. NETGEAR
recommends registering your product through the NETGEAR website.
For product updates and web support, visit http://support.netgear.com.
Phone (US & Canada only): 1-888-NETGEAR.
Phone (Other Countries): Check the list of phone numbers at http://support.netgear.com/general/contact/default.aspx.
Contact your Internet service provider for technical support.
Compliance
For regulatory compliance information, visit http://www.netgear.com/about/regulatory.
See the regulatory compliance document before connecting the power supply.
Trademarks
© NETGEAR, Inc., NETGEAR and the NETGEAR logo are trademarks of NETGEAR, Inc. Any non-NETGEAR trademarks are
used for reference purposes only.
Revision History
Publication Part Number Publish Date Comments
208-10793-01 November 2011 First publication
208-10793-02 March 2015 v 10.0.02 software

3
Contents
Chapter 1 Get Started
Available Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Overview of the Access and Initial Configuration Options . . . . . . . . . . . . . . . . . . 5
Prepare a Terminal and Access the Switch Through the
Console Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Prepare a Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Access the Switch Through the Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Start the Switch and Observe the Power-On Self-Test . . . . . . . . . . . . . . . . . . . . 7
Use the Management VLAN Interface or Console Port for Initial Configuration 7
Perform Initial Configuration of the Switch Through a DHCP Server. . . . . . . 8
Perform Initial Configuration of the Switch Through the Console Port . . . . . 8
Use ezconfig for Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Use the Web Management Interface for Initial Configuration . . . . . . . . . . . . . . 12
Overview of the Web Management Interface . . . . . . . . . . . . . . . . . . . . . . . . . 12
Use the Web Management Interface to Configure the Management
VLAN Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Access the Web Management Interface When the Switch Is
Already Connected to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Configure an SNMPv3 User Profile Using the Web Management Interface 15
Chapter 2 Use the Auto Install Configuration
Auto Install Configuration Concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Switch IP Address Assignment Concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TFTP IP Address and Configuration File Name Concepts. . . . . . . . . . . . . . . . . . . 18
About Conflicting TFTP Server Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . 19
About DNS Server Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
About Obtaining a Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Host-Specific Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Default Network Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Configure Auto Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Configure Auto Install Through the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Configure Auto Install Through the Web Management Interface . . . . . . . . . 22
Monitor and Complete the Auto Install Process . . . . . . . . . . . . . . . . . . . . . . . . 23
Event Logging for the Auto Install Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 3 Manage Switch Registration
Register Your Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4
1
1. Get Started
This manual describes software configuration tasks that are most commonly used when you
install a new M4100 series switch. To configure the switch software, connect a terminal to the
switch.
This chapter includes the following sections:
•Available Publications
•Overview of the Access and Initial Configuration Options
•Prepare a Terminal and Access the Switch Through the Console Port
•Start the Switch and Observe the Power-On Self-Test
•Use the Management VLAN Interface or Console Port for Initial Configuration
•Use the Web Management Interface for Initial Configuration
Note: For more information about the topics covered in this manual, visit the
support website at support.netgear.com.
Note: Firmware updates with new features and bug fixes are made
available from time to time at downloadcenter.netgear.com. Some
products can regularly check the site and download new firmware, or
you can check for and download new firmware manually. If the
features or behavior of your product does not match what is
described in this guide, you might need to update your firmware.

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M4100 Series Switches
Available Publications
A number of other publications are available for your switch at downloadcenter.netgear.com,
including the following publications:
•M4100 Chassis Hardware Installation Guide
•M4100 Switch Module Installation Guide
•M4100 Command Line Interface Manual
Refer to the M4100 Command Line Interface Manual for information about the command
structure. This provides information about the CLI commands used to configure the
switch. It provides CLI descriptions, syntax, and default values.
•M4100 Software Administration Manual
•M4100 Web User Guide
Overview of the Access and Initial Configuration Options
To configure the switch, you can access it through the console port, management VLAN
interface, or web management interface. For information about these options, see the
following sections and information:
•Use the Management VLAN Interface or Console Port for Initial Configuration on page 7
If a DHCP server exists on your network, you can perform the initial configuration through
the management VLAN interface or service port. If no DHCP server exists on your
network, you can perform the initial configuration using the CLI through the console port.
•Use the Web Management Interface for Initial Configuration on page 13
Access the web management interface through an Ethernet connection to perform the
initial configuration.
Tip: Use the web management interface for configuration instead of the CLI.
Web configuration is quicker and easier than entering the multiple
required CLI commands.
Prepare a Terminal and Access the Switch Through the
Console Port
To access the console port on the switch, you need a VT100-compatible terminal or a
computer that provides either a serial port or a USB port and that runs VT100 terminal
emulation software.

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M4100 Series Switches
You can access the console port of the switch either through a mini-USB port or through the
serial port:
•Mini-USB port. The switch comes with a mini-USB to USB cable, which you can use to
connect the mini-USB console port on the switch to a USB port on a VT100-compatible
terminal or a Windows computer that runs VT100 terminal emulation software.
Note: To use the mini-USB port, you must install the USB driver on the
computer. (The Windows USB driver is on the resource CD.)
•Serial port. The serial port is configured for 115200 baud, eight data bits, one stop bit,
and no parity. It is a DB9 male connector. You must connect an RS-232 crossover cable
(which might not come in the switch package) from the serial port to the DB9 port on a
VT100-compatible terminal or computer that runs VT100 terminal emulation software.
Prepare a Terminal
To configure the terminal emulation software:
1. Select one of the serial ports to connect to the console.
2. Set the data rate to 115200 baud.
The speed is set to 115200 baud at the factory. The setting is also printed on the front
panel under the console port.
3. Set the data format to eight data bits, one stop bit, and no parity.
4. Set the flow control to none.
5. Under Properties, select the correct mode.
6. Select terminal keys.
Access the Switch Through the Console Port
You can use a locally or remotely attached terminal to access the switch through the console
port.
To access the switch through the console port:
1. Set up a VT100-compatible terminal on the computer and open the appropriate COM
port.
When the terminal interface initializes, the login user prompt displays.
2. Enter your user name and password.
The default for the user name is admin and the password is blank (that is, do not enter a
password).
You can now access the switch with its default configuration.
For information about how to perform the initial configuration of the switch through the
CLI, see Perform Initial Configuration of the Switch Through the Console Port on page 8.

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M4100 Series Switches
For detailed information about how to use the CLI to configure the switch with all its
options, see the M4100 Command Line Interface Manual that is available at
downloadcenter.netgear.com.
Start the Switch and Observe the Power-On Self-Test
When you supply power to the switch, the switch goes through a power-on self-test (POST).
The POST runs every time that the switch initializes and checks the switch hardware before
booting the switch. If the POST detects a critical problem, the startup procedure stops. The
boot process runs for approximately 60 seconds.
If POST passes successfully, a valid executable image loads into RAM. If you connect a local
terminal to the switch, POST messages display on the terminal and indicate test success or
failure.
To start the switch:
1. Locate an AC power receptacle.
2. Connect the switch to the AC receptacle.
The switch does not provide an on/off button.
Use the Management VLAN Interface or Console Port for
Initial Configuration
The management VLAN interface and service port let you access the switch from a remote
workstation over an Ethernet network. You must configure the IP address, subnet mask, and
default gateway on the switch.
The management VLAN interface, which you can access through any regular port in the
management VLAN, is an in-band connection.
Perform the initial configuration of the switch by using one of the following methods:
•DHCP server. Use a DHCP server through the management VLAN interface or service
port (see Perform Initial Configuration of the Switch Through a DHCP Server on page 8).
•CLI. Use the CLI through the console port (see Perform Initial Configuration of the Switch
Through the Console Port on page 8).
•ezconfig. Use the ezconfig application through the management VLAN interface or
console port (see Use ezconfig for Initial Configuration on page 9).

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M4100 Series Switches
Perform Initial Configuration of the Switch Through a DHCP
Server
You can assign IP information initially through a DHCP server through the management
VLAN interface. The network must provide a DHCP server. By default, DHCP mode is
enabled on the switch.
Configure the DHCP server with IP address and MAC information for the switch. Obtain this
information through the serial port connection using the show in interface vlan 1
command. Set up the server with the following values:
•IP address. The unique IP address for the switch. Each IP parameter is made up of four
decimal numbers, ranging from 0 to 255. If no DHCP server is available to assign an IP
address to the switch through DHCP, the default IP address for the management VLAN
interface is 169.254.100.100.
•Subnet mask. The subnet mask for the LAN, for example, 255.255.255.0.
•Gateway IP address. The IP address of the default router, if the switch is a node outside
the IP range of the LAN.
•MAC address. The MAC address of the switch.
When you connect the switch to the network for the first time after configuring the DHCP
server, the switch is configured with the IP address, subnet, and other information you
supplied. The switch is ready for access through the management VLAN interface or service
port.
If your network does not use a DHCP server, access the switch through the console port to
configure the network information (see Perform Initial Configuration of the Switch Through
the Console Port on page 8) or use ezconfig (see Use ezconfig for Initial Configuration on
page 9).
Perform Initial Configuration of the Switch Through the
Console Port
If your network does not use a DHCP server (see Perform Initial Configuration of the Switch
Through a DHCP Server on page 8), you can configure the IP address of the switch through
the console port.
To configure the IP address of the switch through the console port:
1. Set up a VT100-compatible terminal on the computer and open the appropriate COM
port.
When the terminal interface initializes, the user login prompt displays.
2. Enter your user name and password.
The default admin user name is admin and the default admin password is blank, that is,
do not enter a password.

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M4100 Series Switches
3. Disable the default DHCP client mode to assign an IP address manually by entering one of
the following commands:
For the management VLAN interface:
(Management Switch) #config
(Management Switch) (Config)#interface VLAN 1
(Management Switch) (Interface vlan 1)
4. Set the IP address, subnet mask, and gateway address:
For the management interface:
a. Set the IP address:
(Management Switch) #
(Management Switch) #config
(Management Switch) (Config)#interface VLAN 1
(Management Switch) (Interface vlan 1)#ip address ipaddress
subnetmask
Note: By default, VLAN 1 is the management VLAN.
b. Set the gateway:
(Management Switch) (Config)#ip default-gateway <gateway-addr>
Use the following information to configure the parameters:
•ip address. The unique IP address for the switch. Each IP parameter is made up of
four decimal numbers, ranging from 0 to 255.
•subnetmask. The subnet mask for the LAN.
•gateway. The gateway address for the subnet. No default subnet exists.
5. To enable these changes to be retained during a reset of the switch, type save at the main
menu prompt, and type yto confirm the changes.
6. To view the changes and verify the IP address information, enter the show ip interface
vlan <management vlan ID> command.
The switch is now ready for Telnet and SSH access as well as for web-based
management.
Use ezconfig for Initial Configuration
You can perform the initial configuration by using the Easy Setup Wizard (ezconfig) through
the management VLAN interface or console port.

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M4100 Series Switches
ezconfig Overview
ezconfig is an interactive utility that provides a simplified procedure for setting up the
following basic switch settings:
•Switch management IP address
•Switch admin user password
•Switch name and location
Start ezconfig and Configure the Switch
You can enter ezconfig either in Global Config mode (#) or in Display mode (>).
At any point in the setup, you can type Qto abort the program. ezconfig checks for any
changes and prompts you to save the changes.
To start ezconfig and configure the switch:
1. Enter the ezconfig command.
The utility displays the following text:
(Switch) >ezconfig
NETGEAR EZ Configuration Utility
--------------------------------
Hello and Welcome!
This utility will walk you through assigning the IP address for
the switch management CPU. It will allow you to save the changes
at the end. After the session, simply use the newly assigned IP
address to access the Web GUI using any public domain Web browser.
Admin password not defined. Do you want to assign the admin
password (password length should vary in a range of 8 - 64
characters)? (Y/N/Q)
You are prompted to change the admin password.
2. For security reasons, change the default password by typing Y, typing a new password, and
confirming the password.
If you already set the password and do not want to change it again, type N.
Enter new password:********
Confirm new password:********
Password Changed!
The 'enable' password required for switch configuration through
the command line interface is currently not configured. Do you
wish to change it (Y/N/Q)? y
Enter new password:********

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M4100 Series Switches
Confirm new password:********
Password Changed!
3. To change the management VLAN ID, type Y, and type a new VLAN ID.
Current Management VLAN ID: 1
Do you want to set new Management VLAN ID (Y/N/Q)?
You are prompted to set up the IP address of the switch.
4. Set up the IP address of the switch, either manually (type C) or through DHCP (type D):
Assigning an IPv4 address to your switch management
Current IPv4 Address Configuration
----------------------------------
Management VLAN ID: 1
IPv4 Address Assignment Mode: Manual
IPv4 Address: 0.0.0.0
Subnet Mask: 0.0.0.0
Default Router IPv4: 0.0.0.0
Routing Mode: Enable
IPv4 address has been assigned manually. What do you want to do?
C - Change IPv4 address.
D - Assign IPv4 address for the switch using DHCP Mode(current
IPv4 address will be
lost).
N - Skip this option and go to the next question.
Q - Quit.
? - Help.
(C/D/N/Q/?)?
If the switch was already assigned an IP address and you do not want to change the IP
address again, type N.
ezconfig displays the current IP address and subnet mask. By default, the network DHCP
server assigns IP addresses automatically according to DHCP. However, you can
overwrite the DHCP client mode by assigning a fixed IP address here. Once a fixed IP
address is assigned, ezconfig automatically disables DHCP client mode and assigns the
static IP address to the management VLAN.

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M4100 Series Switches
5. To set up an IPv6 address for the management VLAN, type Cto assign a new global IPv6
address, or type Dto get an IP6 address from an IPv6 DHCP server, or type Ato generate
the IPv6 address automatically.
Management VLAN ID: 1
IPv6 Address: fe80::6eb0:ceff:fef9:f6e3/64
IPv6 Current state: TENT
EUI64: Disabled
Routing Mode: Enable
IPv6 address has been assigned manually. What do you want to do?
C - Add IPv6 address.
D - Assign IPv6 address for the switch using DHCP Mode.
A - Assign IPv6 address for the switch using Auto Mode.
N - Skip this option and go to the next question.
Q - Quit.
? - Help.
(C/D/A/N/Q/?)
6. To enable the routing interface, type Y.
Do you want routing to be enabled (Y/N)?
7. Assign a switch name and location information.
Enter alphanumeric characters only. Characters such as # and $ are not supported. The
number of characters cannot exceed 31 characters.
Assigning System Name, System Location and System Contact to your
switch management
Current Configuration
--------------------------------
System Name:
System Location:
System Contact:
Do you want to assign switch name and location information?
(Y/N/Q)
Assigning SNTP server for time stamp to your switch management
Current Configuration

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M4100 Series Switches
--------------------------------
SNTP system clock server: unicast
SNTP server:
Do you want to enable SNTP system clock server? (Y/Q)
8. Save the configuration by typing Y.
There are changes detected, do you wish to save the changes
permanently (Y/N)?
y
The configuration changes have been saved successfully.
Please enter 'show running-config' to see the final configuration.
Thanks for using EzConfig!
Your changes are saved in flash memory (permanent storage).
Use the Web Management Interface for Initial
Configuration
This section provides general information about the web management interface and the
steps to perform the initial configuration.
For detailed information about how to use the web management interface to configure the
switch with all its options, see the M4100 Web User Guide, which is available at
downloadcenter.netgear.com.
Overview of the Web Management Interface
To access the switch through the web management interface, use the latest version of a web
browser such as Google Chrome, Mozilla Firefox, or Microsoft Internet Explorer.
The web management interface and terminal interface differ in various ways. For example,
on the web management interface, you can display the entire forwarding database; the
terminal interface displays only 10 entries starting at specified addresses.
The switch accommodates two types of users: administrative users and guests. An
administrative user can configure the switch for network applications, but a guest cannot. The
guest can only view the settings and status of the network. By default, both users can log in
without a password. NETGEAR strongly recommends that you create a unique password for
the administrative user before placing the switch into production.
The web management interface lets you configure and use the following types of features:
•System. Configuration and status information for system features and services such as
the timer, DNS server, IP address, and system resource usage

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M4100 Series Switches
•Switching. Features that relate to Layer 2 services such as VLANs, link aggregation,
Spanning Tree Protocol, port configuration, and the MAC address table
•Routing. Layer 3 services such as VLAN routing, port routing, and protocols such as RIP,
OSPF, VRRP, and other protocols
•QoS. Quality of Service features such as DiffServ and CoS queue assignment
•Security. Security services such as 802.1x port authentication, traffic control with various
forwarding controls, and ACLs
•Monitoring. Ethernet port statistics, various system logs, and port mirroring
•Maintenance. Services to perform a firmware upgrade, to save the configuration, and to
perform a backup of the configuration
Use the Web Management Interface to Configure the
Management VLAN Interface
You can configure the management VLAN interface through the web management interface.
However, if you already configured the switch for in-band connectivity (see Use the
Management VLAN Interface or Console Port for Initial Configuration on page 7), the switch
is already connected to the network, access to the web management interface is enabled,
and you do not need to perform the following task.
To configure the management VLAN interface through the web management interface:
1. Prepare your computer with a static IP address in the 169.254.100.0 subnet, for
example, 169.254.100.201.
2. Connect an Ethernet cable from an Ethernet port on your computer to an Ethernet port on
the switch.
3. Launch a web browser such as Google Chrome, Mozilla Firefox, or Microsoft Internet
Explorer.
4. Enter the IP address of the switch in the web browser address field.
Enter 169.254.100.100, which is the default IP address of the management VLAN
interface.
The Login screen displays.
5. Enter the user name and password.
The default admin user name is admin and the default admin password is blank, that is,
do not enter a password.
6. Click the Login button.
The web management interface menu displays.
7. Select System > Management > IPv4 Management VLAN Configuration.

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M4100 Series Switches
8. Select the Configuration Method Manual radio button.
9. In the IP Address field, enter the network IP address for the switch.
For example, enter 10.100.4.100.
10. In the Subnet Mask field, enter the network subnet mask for the switch.
For example, enter 255.255.255.0.
11. Click the Apply button.
Your settings are saved.
12. Log out of the web management interface.
13. Return your computer to its original settings.
If you want to log in to the web management interface again, you now must use the newly
assigned network IP address.
Access the Web Management Interface When the Switch Is
Already Connected to the Network
This procedure describes how to access the web management interface when you already
configured the management VLAN IP address of the switch.
To access the web management interface:
1. Connect an Ethernet cable from an Ethernet port on your computer to an Ethernet port
on the switch.
2. Launch a web browser such as Google Chrome, Mozilla Firefox, or Microsoft Internet
Explorer.
3. Enter the management VLAN IP address of the switch in the web browser address field.
The Login screen displays.
4. Enter the user name and password.
The default admin user name is admin and the default admin password is blank, that is,
do not enter a password.
5. Click the Login button.

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M4100 Series Switches
The web management interface menu displays.
You are ready to configure the switch through the web management interface. For
detailed information about how to use the web management interface to configure the
switch with all its options, see the M4100 Web User Guide, which is available at
downloadcenter.netgear.com.
Configure an SNMPv3 User Profile Using the Web Management
Interface
Configuring an SNMPv3 user profile is a part of user configuration. Any user can connect to
the switch using the SNMPv3 protocol, but for authentication and encryption, additional steps
are needed.
This procedure describes how to access the web management interface and configure an
SNMPv3 user profile when you already configured the network IP address of the switch.
To configure an SNMP V3 new user profile:
1. Connect an Ethernet cable from an Ethernet port on your computer to an Ethernet port
on the switch.
2. Launch a web browser such as Google Chrome, Mozilla Firefox, or Microsoft Internet
Explorer.
3. Enter the management VLAN IP address of the switch in the web browser address field.
The Login screen displays.
4. Enter the user name and password.
The default admin user name is admin and the default admin password is blank, that is,
do not enter a password.
5. Click the Login button.
The web management interface menu displays.
6. Select System > Configuration > User Accounts.
The User Accounts screen displays.
7. From the User menu, select Create.
A new user is created.
8. In the User Name field, enter a new user name.
9. In the Password field, enter a new password and then retype it in the Confirm Password
field.
Note: If SNMPv3 authentication is used for this user, the password must be
eight or more alphanumeric characters.

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M4100 Series Switches
10. If you do not need authentication and encryption, go to Step 14.
11. To enable authentication, from the Authentication Protocol menu, select either MD5 or
SHA.
12. If you do not need encryption, go to Step 14.
13. To enable encryption, do the following:
a. From the Encryption Protocol menu, select DES.
b. In the Encryption Key field, enter an encryption code of eight or more alphanumeric
characters.
14. Click the Apply button.
Your settings are saved.

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2
2. Use the Auto Install Configuration
Auto Install is a software feature that provides for the configuration of a switch automatically
when the switch is initialized and no configuration file is found on the switch.
This chapter includes the following sections:
•Auto Install Configuration Concepts
•Switch IP Address Assignment Concepts
•TFTP IP Address and Configuration File Name Concepts
•About Conflicting TFTP Server Configurations
•About DNS Server Requirements
•About Obtaining a Configuration File
•Configure Auto Install

Use the Auto Install Configuration
18
M4100 Series Switches
Auto Install Configuration Concepts
The downloaded configuration file is not distributed across the chassis. When an
administrator saves the configuration, the configuration file is distributed to all blades.
The Auto Install process requires you to enable DHCP. The downloaded configuration file is
not automatically saved to the startup-config file. An administrator must explicitly issue a
save request to save the configuration. The Auto Install process depends on the
configuration of other devices in the network, including a DHCP server or a TFTP server and,
if necessary, a DNS server.
Auto Install occurs in three phases:
1. Configuration or assignment of an IP address to the switch
2. Assignment of a TFTP server
3. Downloading a configuration file for the switch from the TFTP server
Switch IP Address Assignment Concepts
If DHCP is enabled on the switch and an IP address is not yet assigned, the switch requests
an IP address assignment. The IP address assignment through DHCP normally functions
with the Auto Install feature. That is, the following information that is returned from the server
is recognized:
•The IP address (yiaddr) and subnet mask (option 1) to be assigned to the switch.
•The IP address of a default gateway (option 3), if needed for IP address communication.
Some network configurations require the specification of a default gateway through which
some IP address communication can occur. Option 3 of a DHCP response specifies the
default gateway.
After an IP address is assigned to the switch, if a host name is not already assigned, then
Auto Install issues a DNS request for the corresponding host name. This host name is also
displayed as the CLI prompt the same as if the hostname command was used.
TFTP IP Address and Configuration File Name Concepts
A DHCP server might return the following TFTP configuration file and IP address information:
•The name of the configuration file (bootfile or option 67) to be downloaded from the TFTP
server.
•The identification of the TFTP server from which to obtain the bootfile. See the following
fields:
-The host name of the TFTP server (option 66 or sname). Either the TFTP address or
name is specified, not both, in most network configurations. If a TFTP host name is
given, a DNS server is required to translate the name to an IP address.
-The IP address of the TFTP server (option 150).

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M4100 Series Switches
-The address of the TFTP server (siaddr) to be used for Auto Install requests.
You can also enter this information manually.
No DHCP configuration is saved in the startup-config file.
About Conflicting TFTP Server Configurations
The TFTP server IP address can be deduced from the multiple sources. It is selected from
one of the following fields, listed from the highest priority to the lowest:
•The sname field of a DHCP reply
•The TFTP server name (option 66) of a DHCP reply
•The TFTP server address (option 150) field of a DHCP reply
•The siaddr field of a DHCP reply
About DNS Server Requirements
A DNS server is required to resolve the IP address of the TFTP server only if the sname or
option 66 value is used.
About Obtaining a Configuration File
After obtaining IP addresses for both the switch and the TFTP server, the Auto Install process
attempts to download a configuration file. A host-specific configuration file is downloaded, if
possible. Otherwise, a network configuration file is used as a bridge to get the final
configuration. For more information, see Host-Specific Configuration File on page 19 and
Default Network Configuration File on page 20.
Host-Specific Configuration File
If the DHCP server specifies a bootfile name, the switch attempts to download a host-specific
configuration file. The switch makes three unicast TFTP requests for the specified bootfile. If
the unicast attempts fail, or if a TFTP server address was not provided, the Auto Install
process stops. No broadcast attempts are made.
Note: The bootfile is required for a file type of *.cfg. The bootfile cannot be
named fastpath.cfg, startup-config, or hpc_broad.cfg.
These names are reserved.