Disclaimer: This information is provided as-is for the benefit of the Community. Please contact Sophos Professional Services if you require assistance with your specific environment.

Overview

This Recommend Read shows you how to configure a DHCP server on an Alias IP

Alias IP

You may refer to the following KB for reference:

Add an alias

Step 1:Creating an Alias on Physical Interface

Go to Network> Interfaces, click Add interface and then select Alias.

Step 2:Alias IP Configurations

 Specify the following

• Physical Interface
• IP version
• IPv4/Netmask or IPv6/Prefix

DHCP for Alias IP

Go to Network > DHCP > Server > Add.
Create an Alias Network Range.
Notes:

• Interface: Alias Interface won't show on the Interface drop-down. Select the Port where Alias is created.
  • Ex. Port1
• Dynamic IP Lease: “ IP Alias” needs to be input manually.
• Gateway: “Use interface IP as gateway” needs to be unchecked
  • Enter IP address of Alias IP

See the screenshot below.

To further verify.
Go back to Network > DHCP > Servers.

Network > Interfaces

DHCP Leasing on a workstation

In command prompt

Type ipconfig /release and then Ipconfig /renew

Updated Disclaimer
[edited by: Erick Jan at 9:52 AM (GMT -7) on 17 Apr 2023]