Static IP (no DHCP) randomly reverts to 169.254.x.x until reboot—any ideas?

MulongDeng

Hi everyone,

I’ve run into a small hiccup (in an isolated LAN with no DHCP server at all) and would appreciate any pointers you can share.

My setup:

- A static IP is configured on the device.

- A standalone application starts automatically at boot.

Symptom:

After the system has been up for a while, the interface occasionally drops the static address and falls back to 169.254.x.x. The app then loses connectivity until I manually reboot; once the device comes back up the manually assigned IP is in place again.

Has anyone seen this behaviour before? I’d be grateful for suggestions on what to check (logs, timing, service order, etc.) so I can avoid the constant reboots.

Thanks in advance!

Device: OAK4-D R7/R9
DepthAI: v3.1.0
Luxonis OS: RVC4 1.20.5 (debug)

MulongDeng

When the router or switch has a DHCP feature, it seems to have two IP addresses. One is the one I assigned, and the other is the auto-assigned one. I assign IP addresses following the documentation, like agentconfd configure 192.168.10.15,255.255.255.0,192.168.10.1.

MulongDeng

Hi @jakaskerl @OskarSonc @MatevzMorato ,
Could anyone lend me a hand?

jakaskerl

MulongDeng
You are not the first to experience this.. Let me see if I can repro this.

Thanks,
Jaka

jakaskerl

MulongDeng
I think we have narrowed down the issue. Let's try something..

Hotfix for now - from inside the device (ADB):
agentconfd configure 192.168.10.15,255.255.255.0,192.168.10.1
or if you need a DNS server
agentconfd configure 192.168.10.15,255.255.255.0,192.168.10.1 --dns 8.8.8.8
then edit the profile config:

nmcli c modify static-eth0 ipv4.method manual
nmcli c down static-eth0
nmcli c up static-eth0

Thanks
Jaka

MulongDeng

Thank you so much, jakaskerl . I’ve tried your suggestion and it works like a charm.