Symptoms

If a Linux client has GRO (Generic Receive Offload) enabled and connects to a BIG-IP using MPTCP with checksumming, the Linux client may occasionally close the connection with a spurious MPTCP Checksum error.

Impact

Connection may fail.

Conditions

Linux client system using MPTCP with checksums and GRO enabled.

Workaround

A workaround is to disable GRO on the Linux client system using ethtool.

Fix Information

Improve generation of MPTCP checksums.

Behavior Change