[30403] in North American Network Operators' Group
Re: recent internet packet size samples
daemon@ATHENA.MIT.EDU (Mark Milhollan)
Thu Aug 3 16:35:16 2000
To: nanog@merit.edu
In-reply-to: Your message of Mon, 31 Jul 2000 08:58:39 +0800.
<004101bffa8a$8bb9be60$9c0361ca@cn.net>
Date: Thu, 03 Aug 2000 13:32:09 -0700
Message-ID: <25106.965334729@ftel.net>
From: Mark Milhollan <mlm@ftel.net>
Errors-To: owner-nanog-outgoing@merit.edu
"Yu Ning" <yuning@cndata.com> wrote:
>You will find there is some discrepancy between the direct result 581,
>and if you calculate probability size from the packets distribution:
[...]
>the error is: 615.744-581 = 34 bytes
I haven't checked, but this might be a case of different semantics.
Where "packets" in the sample distribution is of the entire ip datagram,
but the protocol flow summary is of only the payload data.
>I have a question, how to get the packets size stat from a GSR? We
>know dcef is enable default in GSR, can we use dcef to get the stat ?
The flow cache should provide this information on the GSR as well, and
is not otherwise dependent on the forwarding path (dCEF).
