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02-25-2008, 05:37 PM #1Web Hosting Guru
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CoreNetworks & bandwidth limitation
Hi everybody,
My server with CoreNetworks works fine but I noticed a very strange problem. At a specific time, whenever the download bandwidth increases, the upload transfer rate decreases and vice versa. I verified this by letting a group of people download some files from the server and then I tried to test the upload speed and it was at 4 KB/s. When I stopped the Apache server, the upload rate increases immediately to something above 30 KB/s. I tested this from different Internet connections and different regions.
I have several other servers with different ISPs. However, I have never faced this problem with any of them.
I contacted their support but they didnt help on this regard. So, what do you think?
Many thanks
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02-25-2008, 05:39 PM #2cout << m_subtitle;
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Their bandwidth is being too overselled (?)
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02-25-2008, 06:28 PM #3Retired Moderator
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Caronet-Rob I am surprised you would even suggest that without knowing their network setup and more importantly, you ignore the obvious.
The server card is set to half duplex.
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02-25-2008, 07:11 PM #4Web Hosting Guru
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02-25-2008, 07:43 PM #5Web Hosting Guru
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Their support (Andrew) just replied to me and told me that all of their server are set to full duplex!
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02-25-2008, 07:43 PM #6cout << m_subtitle;
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02-25-2008, 08:13 PM #7Web Hosting Guru
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If they normally set all of their servers to full duplex it's possible that your server just didn't get set -- verify that your server is in fact set to full duplex.
If your server is set to full duplex, ask them to verify that the switch port you're connected to has autonegotiation turned off and is forced to full duplex.
Alternatively, you could try switching your server to autonegotiation and see if the problem clears up (that would indicate their switch port is still set for auto, not forced).Take 2 Hosting, Inc. - Hosting Done Right
Fully automated setup - new servers in as little as 10 minutes
http://www.take2hosting.com/
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02-25-2008, 08:47 PM #8Junior Guru
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I also have a server there, and have been able to pull close to the full 10mbps downloading, not sure about uploading.
Length: 104857600 (100M) [application/zip]
Saving to: `100MB-testfile.zip.1'
100%[=======================================>] 104,857,600 1.12M/s in 89s
19:48:10 (1.12 MB/s) - `100MB-testfile.zip.1' saved [104857600/104857600]
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02-25-2008, 11:40 PM #9Retired Moderator
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02-27-2008, 01:59 PM #10Junior Guru Wannabe
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Just wanted to post an update for clarification. The upload speed was
slowing down because the outbound bandwidth was fully saturated at
his port speed. Even uploads need to get their ACK packets back, and
the slower they are received, the slower the upload will proceed.-Russell
http://corenetworks.net
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02-27-2008, 02:16 PM #11Retired Moderator
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Thanks for the update. From his original post, It never occurred to me that he would be maxing out his local port speed.
CloudNexus Technology Services
Managed Services
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02-27-2008, 03:36 PM #12roflcopter
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His 30kbps full duplex port? ;P
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02-27-2008, 03:44 PM #13Junior Guru Wannabe
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-Russell
http://corenetworks.net