iPhone Tethering Problem

I am brand new to OpenWrt. I just installed 19.07.03 on my Netgear R7800 and my wireless network is up and running. I wanted to configure iPhone tethering for my iPhone 11 Pro (I could do this on DD-WRT). I followed the directions here -- https://openwrt.org/docs/guide-user/network/wan/smartphone.usb.tethering.

My iPhone is not delivering internet to the router. If I look at the kernel.log, everything looks okay except for this:

[   53.253798] ipheth 1-1:4.2: Apple iPhone USB Ethernet now disconnected
[   53.256022] ipheth 1-1:4.2: Apple iPhone USB Ethernet device attached
[   74.323770] ipheth 1-1:4.2: Apple iPhone USB Ethernet now disconnected
[   74.326326] ipheth 1-1:4.2: Apple iPhone USB Ethernet device attached
...

My log is full of those messages -- it looks like the iPhone is continually attaching and disconnecting. Has anyone run into this? What could I have missed?

Thanks!

I figured this out. The instructions I followed said to use 'eth1' for the ifname, but apparently that was already in use on my R7800. I changed it to 'eth2' and my iPhone tethering is working. Yay!

uci set network.TetheringWAN.ifname='eth2'
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