Cell Relay Archive

["Jerric Davis" <pheadrus1@hotmail.com>]

Yige,
  I think that I do know to what you are referring.  I have had a switch
trash some IP packets due to SAR chip problems(this generally makes the IP
guys mad!) In Segmentation and Reasembly (AAL5), the PDU has a 32byte CRC
added to the end of the PDU before it is segmented into cells, on reassembly
this CRC is checked.  I don't have the docs in front of me but you might
look at the SAR process for your answer.


Yige Zhu <zyg@dcb.hz.zj.cn> wrote in message
news:3861aff4.86747320@news.bentium.com...
> I am reading a document about ATM test.In this document, it mentioned
> payload CRC while testing errored cells.I do not know what is payload
> CRC.Cause there is only HEC in the header of a cell,and the remain 48
> octets are data,there is no CRC in the cell at normal condition.
> So is the payload CRC means send special cells which the payload,48
> octets,have some octets reserved  for CRC?and this CRC check the 48
> octets or 53 octets?
>
> Thanks in advance.