nanog mailing list archives
RE: Bandwidth issues in the Sprint network
From: "Frank Bulk" <frnkblk () iname com>
Date: Thu, 10 Apr 2008 12:17:25 -0500
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:peiffer () umn edu] Sent: Wednesday, April 09, 2008 9:50 AM To: frnkblk () iname com Cc: nanog () merit edu 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: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of
Mike
Gonnason Sent: Wednesday, April 09, 2008 9:05 AM To: nanog () merit edu Subject: Re: Bandwidth issues in the Sprint network On Tue, Apr 8, 2008 at 9:19 AM, Brian Raaen <braaen () zcorum com> wrote:I have been using the Java based versions of the speed test. At thispoint Ihave had some Sprint people get in contact with me so I will see whattheyfind. Thank you for all your help to everyone. -- Brian Raaen Network Engineer braaen () zcorum comOn Monday 07 April 2008, you wrote:> I am currently having problems get upload bandwidth on a Sprintcircuit. Iam 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. Ihavetested against multiple networks and this has stayed the same.MonitoringCacti graphs and the router I do get about 30Mbps total traffic
outbound,
butindividual (flows/ip?) test always seem limited. I would like to know
if
anyone else sees anything similar, or where I can get help. Theassistance Ihave gotten from Sprint up to this point is that they find no problems.Dueto the consistency of 5Mbps I am suspecting rate limiting, but wanted to > know if I was overlooking something else. > > -- > Brian Raaen > Network Engineer > braaen () zcorum com >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
Current thread:
- Re: Bandwidth issues in the Sprint network, (continued)
- Re: Bandwidth issues in the Sprint network Martin Hannigan (Apr 08)
- Re: Bandwidth issues in the Sprint network Brian Raaen (Apr 08)
- RE: Bandwidth issues in the Sprint network Matthew Evans (Apr 08)
- Re: Bandwidth issues in the Sprint network Sam Stickland (Apr 08)
- Re: Bandwidth issues in the Sprint network Brian Raaen (Apr 08)
- Re: Bandwidth issues in the Sprint network Mike Gonnason (Apr 09)
- RE: Bandwidth issues in the Sprint network Frank Bulk (Apr 09)
- Re: Bandwidth issues in the Sprint network Mike Gonnason (Apr 09)
- Re: Bandwidth issues in the Sprint network Michael Holstein (Apr 09)
- RE: Bandwidth issues in the Sprint network Murphy, William (Apr 09)
- Message not available
- RE: Bandwidth issues in the Sprint network Frank Bulk (Apr 10)
- Re: Bandwidth issues in the Sprint network Mike Gonnason (Apr 09)
- Re: Bandwidth issues in the Sprint network Mike Gonnason (Apr 17)
- RE: Bandwidth issues in the Sprint network Lincoln Dale (Apr 17)
- Re: Bandwidth issues in the Sprint network Chris Adams (Apr 17)
- RE: Bandwidth issues in the Sprint network Robert D. Scott (Apr 07)
- Iperf 2.0.4 Released Kevin Oberman (Apr 07)
- RE: Bandwidth issues in the Sprint network Frank Bulk (Apr 10)