Paul, What kind of a link are you getting from Level3? Could it be a subrate link (i.e. a GigE port with some lower bandwidth service?)
Arie -----Original Message----- From: Paul [mailto:p...@gtcomm.net] Sent: Sunday, June 27, 2010 11:10 To: Arie Vayner (avayner) Cc: cisco-nsp@puck.nether.net Subject: Re: [c-nsp] Centos upload speed slower on 1000m than 100m over WAN links Even plugged directly into edge router (cisco 6500) connected to level3 and tested on another server on level3 5 hops away. When the port is set at 100 i can get full 100m speed, when i set it at 1g I get less, which makes absolutely no sense and I'm totally stumped. Arie Vayner (avayner) wrote: > Paul, > > I am not really aware of the fine details on the CentOS thingie, but can > you describe how the upstream network connection of that server looks > like? What lies beyond the NIC in the next few network hops. > > Thanks > Arie > > -----Original Message----- > From: cisco-nsp-boun...@puck.nether.net > [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Paul > Sent: Sunday, June 27, 2010 09:04 > To: cisco-nsp@puck.nether.net > Subject: [c-nsp] Centos upload speed slower on 1000m than 100m over WAN > links > > I'm not even sure this is the right forum but since we use mainly Cisco > equipment I'll give this a shot. :) > I have tried several centos based servers and compiled various kernels > and the results have been extremely weird. > 90% of the cases the remote hosts can download from a server at > 1-5megabytes per second, and most of these are over > the internet ranging from 30-200ms away. Local (1ms or less) is super > fast 100MB/s for example. > Ok that sounds normal since it's going over the internet, etc. But > here's the )(!...@*! part.. > If I set the port speed to 100 megabits full duplex on the switch and > server , the clients that get 1-5MB/s now get 11MB/s which is > approximately the limit of the 100mbit port. > Totally stumped here, tried different nics, servers, even 4 different > switches. Is a very interesting problem and I'm probing to see > if anyone else has encountered it. > So far the only OS i have tried is centos, but different versions and > kernels and hardware. > All the switches/routers are Cisco based, but I seriously doubt that has > > anything to do with this. :P > > -- GloboTech Communications Phone: 1-514-907-0050 x 215 Toll Free: 1-(888)-GTCOMM1 Fax: 1-(514)-907-0750 p...@gtcomm.net http://www.gtcomm.net _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/