On Fri, 2002-03-01 at 21:00, Robert Waldner wrote: > > On 01 Mar 2002 14:22:43 +1100, Kevin Littlejohn writes: > >Be aware that on-the-wire counting will give you traffic counts > >inclusive of packet overhead, whereas counting in squid will give you > >only the size of the content in question. Don't do math on these > >things, as one rather large provider used to do ;) > > Why go to trouble with accounting in squid? Just account on the > "insode" interfaces, compare with the totals of "outside" and you're > set. ipac-ng can do this, only the png-generation is severely broken > at the moment (I'm debugging it right now).
If that's all you need, that's fine. If you need to break down billing based on "proxy traffic is xc/Mb, other traffic is yc/Mb", then you'll need to at least document the different counting methodologies - otherwise, your downstream will want to know what the story is ;) > >Be aware of media-specific packet wrapping sizes, and be aware of the > >difference between "the size of the content", and "the size of the > >content + IP headers". > > Just account on the same layer everywhere and you can split the bill > from the ISP in the proper %s. (While I'm being pedantic) Different physical media have different packet overheads. I don't _think_ there's a difference between 10Mbps and 100Mbps, for instance, but there's definitely a difference between ethernet and dialup (or aDSL, or what-have-you). KevinL -- Internet techie Obsidian Consulting Group Phone: +613 9653 9364 Fax: +613 9354 2681 http://www.obsidian.com.au/ [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
