trying to use second lan to connect to pc with direct link

[Ranger21]

I have terramaster F-424

Hello, i do have router which configured with ip address
192.168.2.1
so my local subnet mask is 192.168.2.0/24
in this subnet nas is having ip adress 192.168.2.99 (LAN1-nas)

My pc is having ip adress 192.168.2.101 (LAN1-pc)

I've added second network adapter to my pc and configured it to have ip adress 192.168.5.2 (LAN2-PC) and no gateway
i've connected this LAN2-PC to my LAN2-nas port and configured on NAS ip-adress 192.168.5.3
If i try to access installed openspeedtest on my NAS through browser from PC by ip adress 192.168.5.3 and test it connection speed, it works on 2.5gb and traffic goes succesfully through LAN2-PC
But if i try to open SMB share by ip adress \\192.168.5.3 of nas and transfer files to NAS, my PC suddenly only uses 1gb connection and traffic goes only through LAN1-PC

How do i fix this?

[Ranger21]

Nevermind
I've enabled SMB multichannel + after i restarted NAS everything started to work fine.

[Ranger21]

well, after restarting again it sometimes still uses only 1 gigabit connection...

[Gremlin]

SMB multichannel only works if you have multiple lan connections at both ends. You may need to have both the PC and nas connected to the same network segment.
If the router only has 1gbe sonnection, then each individual connection can only have 1gbe.
For expanded bandwith (not speed) you could consider a bonded connection on your nas, but that probably would not work on your pc (windows does not, I don't know about MAC or linux desktop)