Second Life Forums Archive - Bandwidth spikeing and plummeting

Cyanide Leviathan

Xtreme Loser Squad

Join date: 12 Jun 2003

Posts: 408

02-22-2004 09:46

Ive had a problem all weekend, i log on, and my bandwidth rapidly spikes to around 800 KBPS and then dropps to 2-3 KBPS and then after around five minutes it doesnt recover from the 2-3 KBPS and drops to zero, ive reset my Cable modem several times, talked to comcast, (my ISP) and they told me they werent having ant problems recently, so, whats up?

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Selador Cellardoor

Registered User

Join date: 16 Nov 2003

Posts: 3,082

02-22-2004 10:51

I'm lucky - my ISP might have trouble with bugs in the software, but at least they don't suffer from ant problems.

Dusty Rhodes

sick up and fed

Join date: 3 Aug 2003

Posts: 147

02-23-2004 07:35

Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them. It could be that one of your neighbors is using up the shared bandwidth. Maybe someone is running a web server. Maybe someone caught a virus and is now either sending out lots of email, or launching DOS attacks.

Jack Digeridoo

machinimaniac

Join date: 29 Jul 2003

Posts: 1,170

02-23-2004 07:51

From: someone

Originally posted by Dusty Rhodes
Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them.

I don't know of any cable providers still using unswitched last mile networks.

Xadrian Baysklef

Dancing Monkey

Join date: 17 Nov 2003

Posts: 59

02-23-2004 07:59

From: someone

Originally posted by Jack Digeridoo
I don't know of any cable providers still using unswitched last mile networks.

This seems to be a recent misconception around these boards.

Cyanide Leviathan

Xtreme Loser Squad

Join date: 12 Jun 2003

Posts: 408

02-23-2004 09:24

From: someone

Originally posted by Dusty Rhodes
Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them. It could be that one of your neighbors is using up the shared bandwidth. Maybe someone is running a web server. Maybe someone caught a virus and is now either sending out lots of email, or launching DOS attacks.

we just got cable in the area last month, its completely unsaturated, at bandwirdthplace.com it tells me my speed is 3.5 MBPS...

_____________________

Apotheus Silverman

I write code.

Join date: 17 Nov 2003

Posts: 416

03-01-2004 06:26

Cyanide, I believe the problem you are experiencing is due to something Comcast added to their network. About a month or a month and a half ago, they upgraded so cable modems are now capped at 3mb instead of 1.5mb. Ever since then, my entire cable node has been having issues like you describe.

When I log into SL, I see the exact behavior you describe and I am also on the comcast network. Set your bandwidth to 100 or 200kbps and the problem will be a lot less noticeable, but you will still notice the behavior from time to time. When I had mine set at 300 or higher, SL was completely unusable. at 1-200 it's bearable.

The problem seems to come about any time anyone fires up something that uses 2-300kbps+ UDP streams... the entire node's performance drops right into the toilet. That means that if I crank the bandwidth up on SL, 170 customers' internet access is pretty much non-existent. Likewise, if someone else on my node does something with similar packets, my internet connection dies even if I'm not using SL.

As far as I can tell by talking to comast's support, they have absolutely no intention of fixing this behavior.

_____________________

Apotheus Silverman
Shop SL on the web - SLExchange.com

Visit Abbotts Aerodrome for gobs of flying fun.

Kex Godel

Master Slacker

Join date: 14 Nov 2003

Posts: 869

03-01-2004 08:46

I'm having the same problem on Adelphia lately. It started happening about 1-2 weeks ago, at the same time the telehubs started acting up, and the same time some people started to report recieving tons of bad data to their clients.

It seems a bit coincidential all these are happening at the same time...

Bandwidth spikeing and plummeting
Cyanide Leviathan Xtreme Loser Squad Join date: 12 Jun 2003 Posts: 408	02-22-2004 09:46 Ive had a problem all weekend, i log on, and my bandwidth rapidly spikes to around 800 KBPS and then dropps to 2-3 KBPS and then after around five minutes it doesnt recover from the 2-3 KBPS and drops to zero, ive reset my Cable modem several times, talked to comcast, (my ISP) and they told me they werent having ant problems recently, so, whats up? _____________________
Selador Cellardoor Registered User Join date: 16 Nov 2003 Posts: 3,082	02-22-2004 10:51 I'm lucky - my ISP might have trouble with bugs in the software, but at least they don't suffer from ant problems.
Dusty Rhodes sick up and fed Join date: 3 Aug 2003 Posts: 147	02-23-2004 07:35 Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them. It could be that one of your neighbors is using up the shared bandwidth. Maybe someone is running a web server. Maybe someone caught a virus and is now either sending out lots of email, or launching DOS attacks.
Jack Digeridoo machinimaniac Join date: 29 Jul 2003 Posts: 1,170	02-23-2004 07:51 From: someone Originally posted by Dusty Rhodes Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them. I don't know of any cable providers still using unswitched last mile networks.
Xadrian Baysklef Dancing Monkey Join date: 17 Nov 2003 Posts: 59	02-23-2004 07:59 From: someone Originally posted by Jack Digeridoo I don't know of any cable providers still using unswitched last mile networks. This seems to be a recent misconception around these boards.
Cyanide Leviathan Xtreme Loser Squad Join date: 12 Jun 2003 Posts: 408	02-23-2004 09:24 From: someone Originally posted by Dusty Rhodes Remember that with cable broadband, you are on a LAN with others in your neighborhood, and share bandwidth with them. It could be that one of your neighbors is using up the shared bandwidth. Maybe someone is running a web server. Maybe someone caught a virus and is now either sending out lots of email, or launching DOS attacks. we just got cable in the area last month, its completely unsaturated, at bandwirdthplace.com it tells me my speed is 3.5 MBPS... _____________________
Apotheus Silverman I write code. Join date: 17 Nov 2003 Posts: 416	03-01-2004 06:26 Cyanide, I believe the problem you are experiencing is due to something Comcast added to their network. About a month or a month and a half ago, they upgraded so cable modems are now capped at 3mb instead of 1.5mb. Ever since then, my entire cable node has been having issues like you describe. When I log into SL, I see the exact behavior you describe and I am also on the comcast network. Set your bandwidth to 100 or 200kbps and the problem will be a lot less noticeable, but you will still notice the behavior from time to time. When I had mine set at 300 or higher, SL was completely unusable. at 1-200 it's bearable. The problem seems to come about any time anyone fires up something that uses 2-300kbps+ UDP streams... the entire node's performance drops right into the toilet. That means that if I crank the bandwidth up on SL, 170 customers' internet access is pretty much non-existent. Likewise, if someone else on my node does something with similar packets, my internet connection dies even if I'm not using SL. As far as I can tell by talking to comast's support, they have absolutely no intention of fixing this behavior. _____________________ Apotheus Silverman Shop SL on the web - SLExchange.com Visit Abbotts Aerodrome for gobs of flying fun.
Kex Godel Master Slacker Join date: 14 Nov 2003 Posts: 869	03-01-2004 08:46 I'm having the same problem on Adelphia lately. It started happening about 1-2 weeks ago, at the same time the telehubs started acting up, and the same time some people started to report recieving tons of bad data to their clients. It seems a bit coincidential all these are happening at the same time...

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Bandwidth spikeing and plummeting