I have two servers whose ethernet interfaces have an MTU of 9000. The\nswitch supports jumbo frames, and I can successfully exchange full-sized\npackets (9000 bytes IP MTU, plus ethernet headers).\n\nIf I run tcpdump during an iSCSI data exchange, I see packets with a\nreported length of more than 9000 (up to 20000 and more). I checked\nwhether TSO was enabled, and indeed it was. So to make some tests, I\ndisabled it with ethtool, expecting then tcpdump to see packet lengths up to\n9000 bytes. However, after disabling TSO, the maximum packet length I\nsee with tcpdump is 1500.\n\nThe physical card is an Intel Corporation 82576 Gigabit (kernel driver\nigb). Is what I see normal?\n\nThanks.