Would the CHECKSUMOFFLOAD setting in the TCP.IP profile dataset affect XCOM in any way?
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Would the CHECKSUMOFFLOAD setting in the TCP.IP profile dataset affect XCOM in any way?

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Article ID: 14418

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Updated On:

Products

XCOM Data Transport XCOM Data Transport - Windows XCOM Data Transport - Linux PC XCOM Data Transport - z/OS

Issue/Introduction

Would the CHECKSUMOFFLOAD setting in the TCP.IP profile dataset affect XCOM in any way?

Environment

  • XCOM™ Data Transport® for z/OS
  • XCOM™ Data Transport® for Windows
  • XCOM™ Data Transport® for UNIX/Linux PC

Resolution

Absolutely not.

The creation and verification of the various checksums (IP, TCP and so on) which are defined by the involved protocols (like TCP and IP) is the responsibility of the TCP/IP stack itself. Clients of the TCP/IP stack like XCOM are not even aware of these checksums.

(NO)CHECKSUMOFFLOAD directs the TCP/IP stack to offload checksum processing to the network adapter (when it is able to do so) or to process the checksum via software routines.

Whatever way the stack processes them, it is transparent to XCOM.

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