Bandwidth issues in the Sprint network

Brian Raaen braaen at
Tue Apr 8 13:49:03 UTC 2008

Currently there is not a proxy server in the network, although when using some 
of the test on there is a message about compression being used 
for the upload and to remove proxy settings.  I have also been testing using 
FTP on a *nix server as well.  Both the server and PC are connect to a Cisco 
2960 switch in the headend that is connected to the 7200 router.  I can 
transfer ftp at about 80Mbps between the PC and the server, so they are not 
IO bound.  The Site I am testing with is a ftp server located in a colo 
facility that we use and has sufficient bandwidth.  This circuit is clean in 
the sense of not having CRC, framing or other errors but this is a new 
circuit and we have never gotten more than 5Mbps out of a single session 
(flow/ip) across the wan.  I would have to double check the mtu, but it is 
currently the default.

Brian Raaen
Network Engineer
braaen at

On Monday 07 April 2008, Brian Raaen wrote:
> I am currently having problems get upload bandwidth on a Sprint circuit. I 
> using a full OC3 circuit.  I am doing fine on downloading data, but 
> 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 
> 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 
> if I was overlooking something else.
> -- 
> Brian Raaen
> Network Engineer
> braaen at
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