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Splitting port via VLANs on AX88U Pro?

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AlexP11223

New Around Here
Hi, I am still struggling to figure out how to make a basic router-on-a-stick setup as described in https://www.snbforums.com/threads/r...-ax88u-pro-and-ubiquiti-flex-mini-2-5g.93175/
In short, I want to have modem -> managed switch -> router, and several other devices (PC, TV, IoT hubs) connected via other ports on the switch and the router.

So, as I understood so far, the main thing is to
- Create a new VLAN (vlan2).
- Set the modem->switch port to be only for vlan2.
- For the switch->router port, there are probably several approaches, I guess the simplest one (when not planning to isolate things further with VLANs) is just letting everything to pass through: default vlan1 as untagged, vlan2 as tagged.

And then on the router I need to kind of split the WAN port into two virtual ports.
Looks like it is not possible via the VLAN UI ( https://www.asus.com/support/faq/1049415/ )?

So as I understand I need to do that via SSH, and this process is not well documented yet for the new models without robocfg support.

I have read the great work by @LeandroBR https://www.snbforums.com/threads/rt-86u-vlanctl-ethctl-usage-puzzle.54375/#post-581747 about vlanctl (and I guess simpler ip link) but I don't fully understand it and it's about a bit older models.
So does anyone know if what I want to achieve is possible with AX88U Pro (with the latest Merlin)?
Is there maybe any examples implementing a scenario like this?

Also it says that HW Switching must be disabled (ethswctl -c hw-switching -o disable).
Any ideas how much does it affect performance? e.g. will I still be able to achieve 2.5G on a PC connected to the router?
 
Last edited:
@AlexP11223, are you running Asus-Merlin firmware on the RT-AX88U Pro? If so which version?
 

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