![]() ![]() Step 1 - Configuring the Static IP address using DHCP We will also address some FAQs related to the Static IP Address. In this tutorial, you will configure the Static IP Address on Ubuntu 18.04. ![]() There can be many use cases in which you want to set a static IP address like you may want to configure port forwarding or run a media server on the network. Your router DHCP server is responsible for assigning the IP addresses. Let’s briefly understand - What is a Static IP Address? Rtt min/avg/max/std-dev = 0.748/0.830/0.912/0.Choose a different version or distribution Introductionīefore we begin talking about how to configure Static IP Address on Ubuntu 18.04. Workaround: separate cloud-init scripts for each one, assigning a MAC address I have a prepared VM image, which I've cleaned as carefully as possible, using "virt-sysprep", and inside the image running "cloud-init clean -logs -seed" Is there any indication of how the "random" MAC address is generated, or where it's cached? I understand that networkd's default is to randomly generate the MAC address, but (given that many things on the network may break if a duplicate MAC is generated) I believe it would be more reliable to preserve the previous behavior of inherting the MAC from the physical interface instead. Given this configuration, since all layer 3 traffic associated with the bridged interface can only come from the bridge, I would expect (for the purposes of ensuring MAC address uniqueness) the previous behavior of inheriting the MAC address from the physical interface should have been preserved. (I noticed this when the DHCP server provided a different IP address, but I'm not positive that was related, given that a different client identifier could have been used.) However, a random MAC address was generated. I expected the bridge to inherit the MAC address associated with `ens3`, given that was the default behavior in previous Ubuntu releases. When testing Ubuntu 18.04, I configured a bridge in the following way: (possibly the lowest-numbered MAC, for consistency.) ![]() When configuring a software bridge (as I understand it), the default behavior in the Linux kernel (and, thus, also Ubuntu releases) has been to to inherit the MAC address of one of the physical interfaces associated with the bridge. ![]()
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