Changing Networking Route Metric Breaks OS

[jimcortez]

I have been trying some non-standard networking and tried to monkey around with the "Route Metric" number, trying to influence packets to go over a specific interface. When I change these values and reboot, the entire system locks up. When hooking up a monitor, all I see is a single flashing cursor that never loads the "My IP is xxxx" string. There is nothing else I can do, can't change the tty, no networking to ssh in, and nothing I could find in logs by mounting the sd card on another machine. The only solution I have found is to re-flash and start over.

I will start another post asking for help with my networking setup, but I thought I would report this as a separate issue. It occurs on the 6.0 and brand new 7.0 release. I shouldn't really need this feature, but I thought I would report this issue as it totally bricks the system!

SoC: Raspberry Pi 4
No hats, have a RTC hooked up, as well as a custom spidev device

[JonD]

We will need more information to assist.  IP, Subnet Mask, Gateway of each interface, the destination IP address of where you are trying to get to, and which interface the destination is attached to. 

Based on the information you provided on your other question.  You might just need to remove the gateway IP of one of the interfaces.  If one of the interfaces does not have a gateway, everything will route through the interface that has one.

[jimcortez]

Based on the information you provided on your other question.  You might just need to remove the gateway IP of one of the interfaces.  If one of the interfaces does not have a gateway, everything will route through the interface that has one.

This was the answer to my main problem, thank you!

I made this separate post because I found that changing the Route Metric would brick my entire install. The OS would refuse to boot, would not log anything to disk, and not show anything on an attached display. I just wanted to bring up the issue that changing this number can have disastrous consequences!