IP over ATM overhead

John Cavanaugh johnc at msc.edu
Thu Mar 13 15:59:38 UTC 1997

> We are installing an ATM backbone connection and wondering what level 
> of overhead can be expected. ...

I wrote a paper on this subject a couple of years ago.  You can find
it at
under "Papers," the title is "Protocol Overhead in IP/ATM Networks",
or at

The level of protocol overhead depends on the medium, the AAL, and the
size of the transmission unit.  The best you'll do is to get 87% of the
raw bandwidth to the application (most of this is taken up by the lower
layers (ATM and below)), and this number can go as low as 70%.
John Cavanaugh                              EMail: johnc at msc.edu
Minnesota Supercomputer Center, Inc.
1200 Washington Ave. S                      Phone: +1 612 337-3556
Minneapolis, MN  55415                      FAX:   +1 612 337-3400

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