Packet corruption on AC68U Ethernet interfaces

[Andris]

Hello,

I have some wierd Ethernet problem, whenever I try to copy files through SMB or SSH from LAN to AC68U with Merlin and Stock FW it get's corrupted (about once in 10GB). If I copy with SSH(SCP) connection eventually drops with /usr/bin/dbclient: Connection to [email protected]:22 exited: Integrity error.

Here are some scenarios:
1. Ethernet device 1 to Ethernet device 2 - works ok
2. Ethernet device 1 to Asus router - random drops/corruptions
3. Wireless device 1 to Asus router - works ok
4. Ethernet device 1 via Asus router to remote OpenVPN client - random drops/corruptions.

Tried different cables and different client hardware

Any Idea where to look next?

BR,
Andris.