North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Bandwidth issues in the Sprint network
I tried this on three laptops (two different models), and none of them would fully boot. They would lock up at different points. Unless someone has some workarounds, I think I'll be trying another ISO package. Regards, Frank -----Original Message----- From: Tim Peiffer [mailto:[email protected]] Sent: Wednesday, April 09, 2008 9:50 AM To: [email protected] Cc: [email protected] Subject: Re: Bandwidth issues in the Sprint network http://e2epi.internet2.edu/network-performance-toolkit/network-performance-t oolkit.iso Frank Bulk wrote: > Does anyone know of bootable Linux CD with iperf on it? > > Frank > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Mike > Gonnason > Sent: Wednesday, April 09, 2008 9:05 AM > To: [email protected] > Subject: Re: Bandwidth issues in the Sprint network > > > On Tue, Apr 8, 2008 at 9:19 AM, Brian Raaen <[email protected]> wrote: > >> I have been using the Java based versions of the speed test. At this >> > point I > >> have had some Sprint people get in contact with me so I will see what >> > they > >> find. Thank you for all your help to everyone. >> >> -- >> Brian Raaen >> Network Engineer >> [email protected] >> >> >>> On Monday 07 April 2008, you wrote: >>> >> > I am currently having problems get upload bandwidth on a Sprint >> > circuit. I > >> am using a full OC3 circuit. I am doing fine on downloading data, but >> uploading data I can only get about 5Mbps with ftp or a speedtest. I >> > have > >> tested against multiple networks and this has stayed the same. >> > Monitoring > >> Cacti graphs and the router I do get about 30Mbps total traffic outbound, >> > but > >> individual (flows/ip?) test always seem limited. I would like to know if >> anyone else sees anything similar, or where I can get help. The >> > assistance I > >> have gotten from Sprint up to this point is that they find no problems. >> > Due > >> to the consistency of 5Mbps I am suspecting rate limiting, but wanted to >> > know if I was overlooking something else. >> > >> > -- >> > Brian Raaen >> > Network Engineer >> > [email protected] >> > >> >> > > Most of the speed test sites on the Internet basically issue a HTTP > GET request to a server and time the download. For upload they utilize > a HTTP POST via a CGI script and time that. The main issue I have with > these speed tests is that they only use a single TCP session for data > transfer, which is fine if you have a large or self adjusting TCP > window size and a relatively low latency link. > > However for high capacity links, it is unlikely (but possible) that > you are planning to use a single TCP session and consume all the > available capacity. Realistically you will have a few dozen > server/applications/users and produce hundreds/thousands of TCP > sessions which will fully utilize the link. > > For our PtP customers that have concerns regarding capacity, I > generally they suggest setup iperf at both ends and run a few tests > with multiple TCP sessions so they can independently verify. Hopefully > Sprint will take your concerns to heart and assist you with testing. > > -Mike Gonnason >
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