Linux KVM and packet loss?

Question

linux

Actually, the situation is, there is a server, CentOS 6.5 is installed on it, KVM is on it, 2 virtual machines are on KVM. Clog the channel at 10mbps. ethstatus shows that it runs about 10k pps. Actually on the server 1Gbps connection.
And with these initial data, the channel drops, from 5 to 10 minutes the server is "in itself". In fact, it is clear that virtual machines organize such consumption, but the behavior is similar to a small DDoS.
Where to dig?!

Answer 1

Dig towards increasing buffers in sysctl. It’s hard to understand without logs, only guessing on a crystal ball.

Answer 2

well, filter the left traffic with a firewall so that it does not interfere