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Cell Relay Retreat>List Archive>month:1999-Jan> msg00157



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Re: AAL2 HEC calculation

  • From: Nige <znige@zwg.zicl.co.uk>
  • Date: Tue, 26 Jan 1999 18:01:48 +0000
  • Newsgroups: comp.dcom.cell-relay
  • Organization: (Posted via) U-NET Internet Ltd.
  • X-Complaints-To: news@u-net.net


Phil Guillemette wrote:
> 
> Hi,
> 
> I'm not an expert with respect to HEC calculations, but if I am not
> mistaken, the HEC is calculated the same way no matter what AAL is being
> used.  It only has to do with the other 4 octets in the ATM cell header.

Yes, Phil, you are absolutely right.  This must be the case,
otherwise all the switches in the network would need to
know which AAL you were using.

   Cheers,
     Nige