nanog mailing list archives
Re: common method to count traffic volume on IX
From: Stephen Fulton <sf () lists esoteric ca>
Date: Wed, 18 Sep 2013 19:10:35 -0400
> Ding ding ding! And that's why honest IXPs graph both, to show that > they have no packet loss on their inter-switch links.It depends on what is being measured. At TorIX we'll see deviations between in/out on our aggregate graph. As we combine all peer ports to form the aggregate graph, any large deviations are almost always due to peers who have reached capacity limits on their port (which is not always port speed, btw, always include their transport behind the port). Another common reason is the difference in measurement times across all ports.
http://www.torix.ca/stats.php -- Stephen On 18/09/2013 6:55 PM, Niels Bakker wrote:
* bicknell () ufp org (Leo Bicknell) [Wed 18 Sep 2013, 19:23 CEST]:On Sep 17, 2013, at 3:15 PM, Niels Bakker <niels=nanog () bakker net> wrote:I don't know of any IXP that does this. Industry standard is as you and others wrote before: the 5-minute counter difference on all customer-facing ports, publishing both input and output bps and pps. I guess MRTG is to 'blame' for these values more than anything.Serious question, at an IXP shouldn't IN = OUT nearly perfectly?Ding ding ding! And that's why honest IXPs graph both, to show that they have no packet loss on their inter-switch links. (Or, much more likely, measurement errors due to wrong config for the grapher) -- Niels.
Current thread:
- Re: common method to count traffic volume on IX, (continued)
- Re: common method to count traffic volume on IX Martin T (Sep 17)
- Re: common method to count traffic volume on IX Patrick W. Gilmore (Sep 17)
- Re: common method to count traffic volume on IX Tom Taylor (Sep 17)
- Re: common method to count traffic volume on IX Michael Hallgren (Sep 17)
- Re: common method to count traffic volume on IX Michael Hallgren (Sep 17)
- Re: common method to count traffic volume on IX Leo Bicknell (Sep 17)
- Re: common method to count traffic volume on IX Peter Kristolaitis (Sep 17)
- Re: common method to count traffic volume on IX Niels Bakker (Sep 17)
- Re: common method to count traffic volume on IX Leo Bicknell (Sep 18)
- Re: common method to count traffic volume on IX Niels Bakker (Sep 18)
- Re: common method to count traffic volume on IX Stephen Fulton (Sep 18)
- Re: common method to count traffic volume on IX Nick Hilliard (Sep 18)
- Re: common method to count traffic volume on IX Niels Bakker (Sep 19)
- Re: common method to count traffic volume on IX Nick Hilliard (Sep 18)
- Re: common method to count traffic volume on IX Patrick W. Gilmore (Sep 17)
- Re: common method to count traffic volume on IX Niels Bakker (Sep 18)
- Re: common method to count traffic volume on IX Randy Bush (Sep 18)
- Re: common method to count traffic volume on IX Randy Bush (Sep 18)
- Re: common method to count traffic volume on IX Niels Bakker (Sep 19)
- Re: common method to count traffic volume on IX Will Hargrave (Sep 19)