I made a comparable setup on a raspberrypi3b+ and I see in the journal: Jul 07 17:37:01 raspi7 systemd-networkd[292]: wlan0: Configuring with /etc/systemd/network/10-wlan0.network. Jul 07 17:37:01 raspi7 systemd-networkd[292]: wlan0: Failed to set master interface: Device does not allow enslaving to a bridge. Operation not supported Jul 07 17:37:01 raspi7 systemd-networkd[292]: wlan0: Failed It worked many years ago when it was buster or bullseye and using ifupdown interfaces network setup. Also ported that to NetworkManager before Bookworm and that works, also in Trixie. This is my first manual setup, as it is Debian Trixie based, I can avoid the use of netplan.io. I remember I have seen this issue somewhere, It might be a newer release systemd issue. But have not searched internet now, will see later why this is.

Well, netplan is the advertised / provided solution for Armbian. So when you look into /etc/systemd/network you find a readme from armbian pointing you to /etc/netplan. I think what netplan does is generating the following files for systemd-networkd under /run/systemd/network: 10-netplan-end0.network: [Match] Name=end0 [Link] MACAddress=02:cd:08:83:3c:f3 [Network] LinkLocalAddressing=no Bridge=br0 10-netplan-wlan0.network [Match] Name=wlan0 [Network] LinkLocalAddressing=no Bridge=br0 10-netplan-br0.network [Match] Name=br0 [Network] LinkLocalAddressing=ipv6 Address=192.168.178.29/24 DNS=9.9.9.9 DNS=1.1.1.1 ConfigureWithoutCarrier=yes [Route] Destination=0.0.0.0/0 Gateway=192.168.178.1 Metric=200 10-netplan-br0.netdev [NetDev] Name=br0 Kind=bridge And this is the ip output: ip route: default via 192.168.178.1 dev br0 proto static metric 200 192.168.178.0/24 dev br0 proto kernel scope link src 192.168.178.29 ip link: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: end0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state UP mode DEFAULT group default qlen 1000 link/ether 02:cd:08:83:3c:f3 brd ff:ff:ff:ff:ff:ff altname enx02cd08833cf3 3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether a2:67:ed:53:cb:f1 brd ff:ff:ff:ff:ff:ff 4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000 link/ether e0:76:d0:03:53:bc brd ff:ff:ff:ff:ff:ff altname wlxe076d00353bc

Thanks for the reply @eselarm. I was wondering if the install script was doing more than just flashing the SPI and cloning the partition, but if that's all it does I'm good. Regarding Zram and ramlog, I'm not concerned about how much the Nvme SSD gets written, I mainly use the Rock 5B as a low power NAS for temporary files, it downloads a ton of stuff that get shared on the other devices on my LAN, and after a while the files get deleted, so the work load is already more intense than what a bit of swapping and logging is going to do. But I sometimes use it to host simple game servers for my friends, so from time to time I need all the possible RAM, would disabling ZRAM and ramlog be beneficial, considering the SSD is fast enough to act as an efficient swap?

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I had a quick look at the script, but it is too complex for me to see what could be wrong. Also there is netplan layer in between that I am not familiar with anymore. Maybe you can look at what is generated in terms of systemd-networkd files (e.g. in /etc/systemd/network/ ). And also use commands like ip route etc to see the actual state.