Errors in RX, it means perhaps some clients create garbage
1) Check cable
2) Check connectors
3) Check slot, perhaps interface is not sitting on the motherboard
Faulty cables are often a source of network interface errors. Try changing the cable and
seeing if that helps. Also check the speed and duplex setting of the network interface and
the switch port. Most devices set this to auto-negotiate and this does not always work very
well. Setting the link speed and duplex manually may help.
Possibly the packets are dropped because they are invalid frames (too short, too long,
ethernet checksum failure...)
If on Linux,
ethtool -S eth0
cd /sys/class/net/eth0/statistics && grep . *
might give more information.