With the script below we were able to get a single VM to talk to another VM at slightly better than 3 gigabits per second. Evidently this is unheard of. Proprietary and vendor specific tweaks are not listed; but we may be tapped for assistance on this subject. Please contact us (or leave a comment) with any questions or concerns.
1 2 3 4 5 6 7 8 #!/bin/bash ifconfig eth0 txqueuelen 300000 sysctl -w net.core.rmem_max=134217728 # BDP sysctl -w net.core.wmem_max=134217728 # BDP sysctl -w net.ipv4.tcp_rmem="4096 87380 134217728 " # _ _ BDP sysctl -w net.ipv4.tcp_wmem="4096 65536 134217728 " # _ _ BDP sysctl -w net.core.netdev_max_backlog=300000 ethtool -K eth0 gro on