yeah..
"Hire, Ejay" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Is cell-scrambling enabled? On both ends?
>
>
>
> -----Original Message-----
> From: David Chandler [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, May 08, 2001 7:34 PM
> To: [EMAIL PROTECTED]
> Subject: Re: ATM AAL5 errors [7:3682]
>
>
> #1. The source device encapsulates whatever traffic it has to send in a
> AAL5 PDU then segments the PDU and places the pieces of the PDU into the
> payload of the ATM cells.
>
> #2. AAL5 is almost always is used in UBR (unspecified bit rate) calls.
> ie: No garuntee from the carrier that they will deliver your cell to
> the destination.
>
> #3. During times of congestion the carrier will drop cells in a UBR
> call.
>
> #4. If a cell (or cells) are dropped within the carrier's network; the
> AAL5 PDU's CRC will be invalid.
>
> #5. There is a EOF (end of frame) bit within the Cell header; which
> tells the destination when it has recieved the last cell comprising the
> AAL5 PDU.
>
> #6. If the EOF cell is lost then the destination will try to recombine
> 2 (or more) AAL5 PDUs possibly resulting in a PDU that is too large.
>
> OR
>
> If the only cell comprising a AAL5 PDU made it through the network was
> the EOF cell then the destination will find that the reassembled AAL5
> PDU is smaller than the min allowed
>
>
> This is a Breif overwiew of what ATM does and why you'll see AAL5
> errors.
> There are always ifs and buts and a million little details; BUT I won't
> get into those....
>
> PS: if the errored AAL5 frames are not over 1% then don't worry about
> it.
>
>
> DaveC
>
>
> Q wrote:
> >
> > I'm getting AAL5 CRC and AAL5 Length errors. They are both tied to one
> > another in terms of rate of errors. This is a difficult problem in terms
> > that they are both related. One problem is that the other sidce of the
WAN
> > is a Cabletron SSR 8600 hunk oof crap. Someone give me a clue...TIA!
> >
> > marc
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=4026&t=3682
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
