I have four systems running drbd (several combinations of two-node DRBD devices) which all get "Digest integrity check FAILED" errors. One of the possible causes is TSO, so obivously I want to test running without it. ethtool -K eth1 rx off tx off sg off tso off gso off I ran the above command and saw the following in my logs before the system rebooted: Jan 4 14:39:10 hetz3 kernel: [3167347.964860] e1000e 0000:02:00.0: eth1: Reset adapter Jan 4 14:39:10 hetz3 kernel: [3167347.978907] xenbr1: port 1(eth1) entering disabled state Jan 4 14:39:14 hetz3 kernel: [3167351.681827] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx Jan 4 14:39:14 hetz3 kernel: [3167351.682167] xenbr1: port 1(eth1) entering learning state Is it expected that you can change TSO settings while the system is running? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/