OpenAutomation Knowledge Base

The stream will generally accept any configuration and attempt to transmit packets according to the configuration. In order for the various Xena, stream features to work correctly certain aspects about the minimum packet size used must be observed.

The minimum packet size must obviously be large enough to accommodate the defined protocol headers + the final Ethernet FCS field.

If the TPLD function explained above is enabled then each packet must also be able to contain the TPLD area (20, 22 or 6 bytes depending on the configuration).

If the stream payload type is set to Incrementing then an additional minimum payload area of 2 bytes is needed. Otherwise, excessive payload errors will be reported. This is however not necessary if the Payload Checksum Offset option is enabled on the parent port as this will override the payload integrity check implied by the Incrementing payload type.