How to make a transit switch + VLAN from Mikrotik?

Question

Mikrotik

Dear colleagues.
There was a task and now I will try to outline.
There is one provider.
There is a first WiFi hAP device with a 951Ui-2nD board on board.
There is a second device https://mikrotik.com/product/CRS125-24G-1S-IN
The provider cable is short and left at the entrance to the room and the first device is now located there. Everything is now set up on it, provider, VPN, routing, forwarding, WiFi and so on.
The second device is located in another part of the room.
Between these devices lies a 4-pair cable.
I want to leave everything as it is, but so that the provider goes through the first device and all the settings and the second device takes care of everything, and back to the first via VLAN, the LAN returns via the same cable and the first device works as an access point.
I don’t want to pull another cable, but using one cable to calmly resolve everything. Throw the provider through the first one transparently, but so that the first device works as a local Wi-Fi access point.
Tell me how can I forward the provider through Mikrotik. The VLAN provider does not give.

Answer 1

the provider's port and the port that looks at the switch combine into a bridge. so you prokinish a traffic to a switch.
hang vlan on the bridge and add it to the bridge with the waffle.
on the switch, you also add the same vlan to the port that came from the hap and add it to the bridge with the local network
.
I do not see any difficulties in this matter. If it is difficult to explain, knock on the cart @ pr0lka

Answer 2

If you yourself cannot crimp a 4-pair cable into 2 ends, then take this
https://www.nix.ru/autocatalog/cable_management/5b...