DHCP Auto Configuration on ESW2 350G Series Managed Switches

Objective

Dynamic Host Configuration Protocol (DHCP) is a protocol that provides IP addresses automatically to different devices within a network. ESW2 Series Managed Switches have a DHCP Auto Configuration feature which allows you to apply an already configured DHCP configuration file to your current network. This article explains how to configure the DHCP Auto Configuration feature on ESW2 350G Series Managed Switches.

Applicable Devices

• ESW2-350G-52
• ESW2-350G-52DC

Software Version

• 1.2.6.28

DHCP Auto Configuration

Step 1. Log in to the web configuration utility and choose Administration > File Management > DHCP Auto Configuration. The DHCP Auto Configuration page Opens:

Step 2. In the Auto Configuration Via DHCP field, check the Enable check box to enable this feature.

Step 3. In the Download Protocol fields, click one of the methods for the download of configuration files. The available options are:

• Auto By File Extension — Indicates that auto configuration uses Trivial File Transfer Protocol (TFTP) or Secure Copy Protocol (SCP), which depend on the extension of the configuration files.

         File Extension for SCP — If Auto By File Extension is chosen, enter the file extension of the configuration file in the File Extension for SCP field. Any file with this extension is downloaded via SCP. If no extension is entered, then the default extension file (.scp) is used.

• TFTP Only — Uses TFTP to download the configuration file regardless of the file extension.

• SCP Only — Uses SCP to download the configuration file regardless of the file extension.

• SSH Settings for SCP — When using SCP for downloading the configuration files, select one of the following options:

  Remote SSH Server Authentication — Click on the Enable/Disable link to navigate to the SSH Server Authentication page. There you can enable authentication of the SSH server to be used for the download and enter the trusted SSH server if required.

        SSH Client Authentication — Click on the System Credentials link to enter user credentials in the SSH User Authentication page.

                  Step 4. Enter the following optional information to be used if no configuration file name was received from the DHCP server. The optional configurations are mentioned in the following steps.

 Step 5. Backup Server Definition — Select By IP address or By name to configure the server.

 Step 6. IP Version — Select whether an IPv4 or an IPv6 address is used.

 Step 7. IPv6 Address Type — Select the IPv6 address type (if IPv6 is used). The options are:

        Link Local — The IPv6 address uniquely identifies hosts on a single network link. A link local address has a prefix of FE80, is not routable, and can be used for communication only on the local network. Only one link local address is supported. If a link local address exists on the interface, this entry replaces the address in the configuration.

        Global — The IPv6 address is a global Unicast IPV6 type that is visible and reachable from other networks.

 Step 8. Link Local Interface — Select the link local interface (if IPv6 is used) from the list.

 Step 9. Backup Server IP Address/Name — Enter the IP address or the name of the server to be used if no server IP address was specified in the DHCP message.

   Backup Configuration File Name — Enter the path and file name of the file to be used if no configuration file name was specified in the DHCP message.

 Step 10. Click Apply to finish the configuration. The parameters are copied to the Running Configuration file.