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I m running iperf between two machines (linux) and I can observe the mtu of both the interfaces connected is 1500.
I ran tcpdump to capture packets and I observed some packets have
“length as 2962″….how come this is possible with mtu as only 1500?
Please clarify.
Thanks!
Note: flags field is set as DF. and proto is TCP
Turning off gso (in linux) did the trick
Referred:
http://lists.openwall.net/netdev/2008/11/14/20