It cannot be done between different products, because WiFi bridging is not a standard 802.11 feature but is implemented by the manufacturer in incompatible ways.
You are essentiallly trying, if I get this right, to make a "wireless wire" link between two identical LHG XP ax devices, it is one of the simplest possible setups.
Basically you want:
both devices with a bridge including all interfaces
one of the two with wifi setup as ap mode
the other one with wifi setup as station-bridge mode
You don't need any firewall rules, nor nat, and both devices can have an IP assigned to the bridge or none (but in this case you will only be able to access them with Winbox via MAC).
Check which Quickset options you have on your specific devices, remembering that Quickset should ONLY be run once, and ONLY on a non-configured or just reset device, it could give you a base to work on:
You understood what I want to do but you didn't understand my question
I'M LOOKING FOR A COOKBOOK!
A cookbook is a book that describes step by step how to cook a dish, how much of what to add and at what time. This (https://www.youtube.com/watch?v=CCbVzl6WtF0) is for example a COOKBOOK that solves the same problem but on ROS 6 and with the Wireless package.
I'm looking for the same thing but on version 7 and with the WiFI package.
So if it exists in this form or as a document (it doesn't necessarily have to be a video) I'D LIKE TO SEE IT
Regards
BTW, I didn't find any useful text about it on help.mikrotik.com and some things that would move it closer to the goal - simply don't work.
A given device may (or may have not) a set of Quickset modes.
These are "helpers" that (again only used once and on a new and/or reset device) give the possibility to configure simply a device (intended for people not very familiar with Mikrotik).
If you have them (the "right" ones for your case), you should use them, if you haven't them, it is another thing.
What do you mean "this line doesn't work"?
Post your full configuration, possibly an UNtouched one (taken just after reset), following this:
so that we can give you the instructions on what needs to be changed.
After you reset your device to the default configuration, the Quick Set dialog will popup after the first login. In WinBox you can also access it here anytime:
However, it's advisable to only use it once after the configuration reset. If you have made modifications to you configuration, then don't return to the Quick Set dialog again. The dialog might cause troubles and incompatibilities with configurations it doesn't understand.
I do not have one LHG-5axD-XL, but if the website is right,
with Level 3 licence can not act a "access point with bridge" ap-bridge mode, but only as station/station-bridge.
Since WiFi do not have "only bridge" mode, you can not use it as PtP.
Then things changed from RouterOS v6 to v7, but again, I don't have those two devices to test.
From https://mikrotik.com/product/lhg_5_ax_xl :
”Whether you’re bridging two buildings,” or “ideal for point-to-point links over great distances”. So they are selling this product as PtP solution.
Generally on those they’d set the AP side as “bridge” and client side as “station bridge”. I haven’t been successful in bridging with v7 with the ac/ax-specific packages, but I also haven’t tried with the more recent releases.
I gave up attempting to understand MIkrotik license levels a long time ago, but the wireless wire kit (using wAPs): https://mikrotik.com/product/wireless_wire
is provided with a level 3 license.