Interfaces eth0 and eth1 exchanged

Installing and Using OpenWrt Network and Wireless Configuration
1

I have a GL-AR150 router that used to run fine with 19.07.1. It is configured mostly straightforward, WAN as DHCP client, LAN with static IP and bridged to WLAN0. When I look into the backup of my old configuration, WAN was associated with eth0, LAN with eth1.

Lately I upgraded to 19.07.3. The box did not work anymore, it did not get an address via DHCP, the static address was not reachable. After some experiments I reset the box to factory settings and restarted from scratch. When I looked into the default configuration, I noticed that eth0 was on LAN now, and eth1 on WAN!

There is no VLAN setting in the config.

I restored my configuration backup and exchanged the interfaces. Now it is working again.

Is this normal? What can cause the changing of the interfaces?

2

In most cases, eth0 is LAN and eth1 is WAN by default in OpenWrt.

3

Possibly this commit: ath79: fix default config for devices with eth0/eth1 swapped

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