Hello. Once I have already touched upon this issue at the forum but it has changed a little bit my network so that the problem moving again.

Characteristics of my network

The router Huawei B315> RouterBOARDS RB962UiGS 5HacT2HnT HAP ac as a client after gigabit LAN with DHCP disabled

For RouterBOARDS RB962UiGS 5HacT2HnT Hap ac hooked server on Linux via Gigabit port.

Obtained situation:

Linux server> Huawei B315 wifi 2.4 GHZ (150 Mbps)> Samsung Galaxy S7 - download speed of 12-15 MB / s with Linux server, upload 12-15 MB / s on a Linux server for FTP, SMB, a little slower. In general, the situation around

Linux server> RouterBOARDS RB962UiGS 5HacT2HnT Hap ac 2.4 GHZ (150 Mbps) or 5 GHz (600 Mbps or above)> Samsung Galaxy S7 - download speed of 2.4 GHZ 12-15 MB / s for the 5 GHZ 25-40 MB / s, upload 1.2-1.3 MB / s regardless of whether 2.4 GHz or 5 GHz.

The problem lies with the upload on the Linux server by Mikrotik WIFI regardless of the frequency. So if something slowed WIFI

A strange situation because the speed of upload to the Huawei B315 is normal.

The problem certainly does not apply to the Samsung Galaxy S7, checked on laptop WIFI and second smarfonie situation is the same

Please help