Avg. Packet Size - Again?

Fred Baker fred at cisco.com
Wed Jul 16 15:24:59 UTC 2008

CAIDA has been doing a lot of that, at least in the past. Last I asked  
them, which was quite a while back, they said that O(35%) of traffic  
in their samples was at the path MTU (which included 576 bytes for  
historical reasons), O(40%) was about the size of a TCP SYN or ACK,  
for reasons that are apparent if you think about common TCP  
implementations, and sizes were scattered more or less uniformly in  
between - last packet in a burst or transaction exchanges. From the  
numbers that Valdis posted the other day, it sounds like the logic  
remains about the same but the relevance of "576" has largely gone away.

On Jul 16, 2008, at 4:42 AM, Randy Bush wrote:

>> Our network also shows peaks at the ethernet MTU (our MTU is higher
>> than that) and the DNS packet size.
> so who has been tracking packet size distributions for some years and
> has published or could provide data?
> randy

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