Tcpdump shows packets larger than the MTU of the Ethernet interface.

Solution In Progress - Updated -

Issue

  • MTU size setup with eth0 interface is 1500.
  • Tcpdump result shows packets with MTU greater than 1500.

# tcpdump -i eth0 greater 1500
14:31:37.326560 IP hostname > xxx.2377: P 141952:154840(12888) ack 1469 win 11456
14:31:37.336814 IP hostname > xxx.4970: . 20916:25296(4380) ack 7500 win 62780

Environment

  • Red Hat Enterprise Linux, all versions

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