Precautions On Lan Controller - Hitachi Compute Rack CR 210H User Manual

Precautions on LAN controller

This section describes precautions when using the standard onboard LAN of the
system unit, and an optional LAN mezzanine and LAN card.
TCP Checksum Offload function
The standard onboard LAN of the system unit, and LAN mezzanine
(CN7M0T-Y/CN7M0T-R) and LAN card are equipped with a function for their LAN
controller to perform TCP/IP protocol checksum calculations. However, we
recommend not to use this function but to use the standard TCP/IP checksum
calculation function of the OS.
If the calculation by the OS is set up, the integrity of packet data received from
a network will be checked in the final stage of protocol processing of the OS, thus
enabling construction of a more reliable system.
4-2
If you use the LAN mezzanine (CN7M1S-Y/CN7M1S-R), do not change
the setting of the LAN mezzanine (CN7M1S-Y/CN7M1S-R).
The network performance will be degraded.
Operational precautions
Hitachi Compute Rack 210H User's Guide