MikroTik RB951G-2HnD and Yamaha receiver

Hello. I cant make my MikroTik RB951G-2HnD (ROS 6.4, f/w 3.08) work with network AV receiver Yamaha HTR-6064 / RX-V671(f/w 1.47). Both pieces of hardware work well by their own but not together. If I set receiver to get IP address through DHCP then I get status “Offered” in DHCP Server menu and in log I get

dhcp1 offering lease 192.168.50.23 for 00:A0:DE:87:35:B1 without success

If i set IP manually on receiver then I still cant access it from my network (cant open web gui) and receiver also don’t see my DLNA server. If i try to ping it both from my windows pc or from WinBox i get 28-32% of packet loss. I already tried:

  • 2 different network cables. Both of them work OK with other hardware.
  • Reset receiver to factory defaults.
  • Upgraded receiver to latest firmware.
    The most weird thing that if I connect receiver directly to PC and assign IP address manually on both PC and receiver then ping is OK and I can easily access my receiver web GUI, so everything works as intended. Problem is clearly in Mikrotik and I don’t know what to do. My ROS config is very simple eth1 - WAN, eth2 и wlan = bridge1, eth2 is Master port for eth3-5, no filters, rules.
    Update: I’ve been playing with Ethernet port configuration and managed to connect receiver on 10Mbit/sec Half duplex. If I set full duplex even on 10Mbit/sec then I get errors.
RX Broadcast: 2927, RX Multicast: 6664, RX FCS error: 1006, RX Align error: 1068, RX Fragment: 5515

To prevent fragmentation I’ve lowered MTU to 1472 but I’m still not OK with running low speed ant not being able to use Auto negotiation.

did you get this issue fixed?