Issues with routing wlan1 and wlan2, providing internet connectivity, when wlan0 is enabled

[matrixes]

What I'm trying to achieve

Accessing the internet using two wifi dongles

I have

• 1x RPi Zero 2 W
• 2x Wifi donglesl

What I have done

I followed the instructions at https://docs.raspap.com/repeater/ with the key difference that I'm using wlan1 (AP) and wlan2 (client).

What works

• I can connect to the RPi by wifi (wlan1).
• I can access RaspAP through the DHCP provided IP gateway address (wlan1).
• I can connect (wlan2) to a Wifi access point using RaspAP-webgui.
• The Networking tab is reporting that all connections are working, getting and providing appropriate IP:s
• If I disable/bring wlan0 down, routing between wlan1 and wlan2 works as I expect it to, providing internet connectivity

What doesn't work

I have modified the metric on the DHCP tab of the DHCP Server settings for wlan1, but no matter if I leave it on default empty or a high metric, Internet is not routed.
If wlan0 is enabled (and e.g. gets an IP address), routing between wlan1 and wlan2 doesn't work as I expect it, providing no internet connectivity.

Thoughts

I can certainly disable wlan0 and that would be an at least working setup. But are there other ways of keeping wlan0 running/enabled, and still have routing between wlan1 and wlan2 providing internet connectivity (preferrably using the webgui)?

[billz]

Impossible to determine without your routing table. If you have a working setup with wlan1 and wlan2, what's the purpose for keeping wlan0 enabled?

[matrixes]

My routing table as it currently stands

default via 10.3.141.1 dev wlan0 src 10.3.141.1 metric 3003
default via 192.168.0.1 dev wlan2 proto dhcp src 192.168.0.104 metric 3005
10.3.141.0/24 dev wlan0 proto dhcp scope link src 10.3.141.1 metric 3003
10.9.141.0/24 dev wlan1 proto dhcp scope link src 10.9.141.1 metric 3010
192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.132 metric 600
192.168.0.0/24 dev wlan2 proto dhcp scope link src 192.168.0.104 metric 3005

In response to purpose, I'd say it's mostly out of convenience and secondary that I'm curious whether it's possible to accomplish (somewhat easily).

[billz]

Your wlan0 interface has multiple lower metric values, and therefore higher priorities, than your other interfaces. With this configuration, you will not have connectivity between wlan1 and wlan2. Review how routing works and correct this.

Alternatively, you may delete these routes like so:

sudo ip route del default via 10.3.141.1 dev wlan0
sudo ip route del 192.168.0.0/24 dev wlan0

Note that the Linux kernel (not RaspAP) will add these routes again following a reboot.

tl;dr: answered in the docs; please read them.