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I'm trying to configure my Raspberry Pi 4B running Ubuntu 18.04 with a static IP address (to then configure a DHCP server) and use the WiFi for internet traffic (routing any clients connecting to the DHCP through to the WiFi connection) but I cannot define a static IP address for the LAN, using netplan I have the config: `network: #LAN connection for ipv4 DHCP server version: 2 renderer: networkd ethernets: eth0 addresses: - 10.0.0.1/24 gateway4: 10.0.0.1 nameservers: addresses: [8.8.8.8, 4.4.4.4.4]

    # LAN connection ipv6 - using for DHCP Server
    version: 2
    renderer: networkd
    ethernets:
            eth0:
    addresses:
            - 2001:1::1/64
    gateway6: 2001:1::2
    nameservers:
            addresses: [8.8.8.8, 4.4.4.4]

    # wifi connection
    wifis:
            wlan0
    dhcp4: true
    dhcp6: true
    access-points:
            "SSID-name"
    password: "WiFi Password"

I keep getting indentation errors when I try to apply the plan. The indentation is that which is created when I manually type in the details.

sudo netplan -debug generate
/etc/netplan/50-cloud-init.yaml:11:17: Error in network definition: expected mapping (check indentation)
                eth0
                ^
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  • Netplan is very specific about indentation. It works with the indentation IT wants and not with the indentation YOU want. I suggest that you refer to the provided examples here and amend your yaml file accordingly: netplan.io/examples Welcome to Ask Ubuntu.
    – chili555
    Mar 20, 2020 at 15:34
  • I was referring to netplan.io/examples (one of the first places I looked for info) and it wasn't very helpful. All indentations were created whenever I hit the 'enter' key and began typing the new line. I've finally managed to create a working config. I had a few issues trying to get the WiFi to be the default network configuration but have resolved that also. I'll see if I can upload my working netplan file.
    – cybernyte
    Mar 20, 2020 at 15:50
  • It would be nice to know what you did to get the configuration working :-)
    – Not a machine
    Sep 6, 2020 at 0:43
  • The attached netplan in the answer is what I did. That config resulted in a working DHCP server.
    – cybernyte
    Sep 7, 2020 at 8:04

1 Answer 1

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This is my currently working netplan file. I've managed also to set the WiFi as the default internet connection which is what I want in order to use the eth0 connection for the DHCP server (once that's installed).

    network:
    # wifi connection
    version: 2
    renderer: NetworkManager
    wifis:
            wlan0:
                    dhcp4: true
                    dhcp6: true
                    access-points:
                            "SSID-Name":
                                    password: "password"

    #LAN connection for ipv4 DHCP server
    version: 2
    renderer: NetworkManager
    ethernets:
            eth0:
                    dhcp4: no
                    addresses:
                            - 10.0.0.1/24
                    nameservers:
                            addresses: [8.8.8.8,4.4.4.4]

    # LAN connection ipv6 - using for DHCP Server
    version: 2
    renderer: NetworkManager
    ethernets:
            eth0:
                    dhcp6: no
                    addresses:
                         - 2001:1::1/64
                    nameservers:
                            addresses: [8.8.8.8,4.4.4.4]

I also opted to set NetworkManager as the renderer because I plan to use the GUI on this Pi so will be able to see at a glance what the WiFi status is.

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