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TCP packet with bad checksum errors reported on a single VLAN

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • Transmission Control Protocol (TCP)

Issue

  • EMS log shows TCP checksum errors on a specific VLAN:
netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port a0a-100. The packet arrived on connection with source address XXX.XXX.XXX.XXX and destination_address XXX.XXX.XXX.XXX.
  • No errors are reported on the physical interfaces, the ifgrp itself or other VLANs
  • Packet trace shows:
    • Frame 69934 : ONTAP receives the wrong checksum 0xc9bc
    • Frame 70808 : ONTAP received the correct checksum is0xc300

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