Hopefully this is an easy one to answer, might be harder to change
I have wlan0 (client mode) and eth0.2 both connected to the same network
root@Nexx-LEDE:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.50.1 0.0.0.0 UG 0 0 0 wlan0
10.244.0.0 * 255.255.0.0 U 0 0 0 zt0
192.168.8.0 * 255.255.255.0 U 0 0 0 br-lan
192.168.50.0 * 255.255.255.0 U 0 0 0 eth0.2
192.168.50.0 * 255.255.255.0 U 0 0 0 wlan0
192.168.50.1 * 255.255.255.255 UH 0 0 0 wlan0
root@Nexx-LEDE:~#
On bootup, wlan0 always becomes the default gateway route-even if eth0.2 is connected.I would have thought that good old Ethernet would always be default (because wired is better than wireless?) Is this a design thing ?
I ask as I would like the eth0.2 to be the default route at boot-I have been playing about with ip route del and add -but just wanted to ask if there is a "deep" command that will always prefer Ethernet as the default route.
I managed to find a way-might be a bit cack-handed but works for me:
#change default route on boot up (using /etc/init.d/rc.local) ip route change default via 192.168.50.1 dev eth0.2
(change 192.168.50.1 to your default gateway)
Use the following script to sense if the WAN connection has gone down (will be eth0.2 by default because of step 1-put it in as a cronjob/under scheduled tasks in Luci)
root@Nexx-LEDE:~# cat /etc/check_internet.sh
#! /bin/sh
# Checks if the connection to the Internet is up. If not, it tries to restart all interfaces. If that fails, then reboot.
if ping -c 3 bbc.co.uk > /dev/null
then
echo check WAN is a sucesss > /dev/null
else
/etc/init.d/network restart
#Moves onto 2nd part, to try for a 2nd time!
sleep 15
if ping -c 3 www.google.com > /dev/null
then
echo nothing > /dev/null
else
date >> /etc/reboot.log
reboot -f
fi
fi
root@Nexx-LEDE:~#
There seems to be a bonus point in that when the eth0.2 comes back up/is reconnected, the default route swaps back to eth0.2. It does for me when you disconnected it physically anyway.