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Internet speed cut in half when 2 users use it

DodoKrastavac
By DodoKrastavac
in Networking
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Go to solution Solved by Lurick,
3 minutes ago, SupaKomputa said:

Yeah basically if you have 20 devices with 70mbps that's 1400mbps which is unlimited to me.

Now this may happen if the bandwidth limiter happening inside the modem not the ISP server.

Every wifi has it's own bandwidth, lan on the other hand is treated as 1 channel.

I have cable internet 10 years ago and i can hack it so i get more bandwidth because the limit is imposed inside the modem.

No, that's not how it works. If an ISP is giving you X speed you get that across all devices to the outside that's what you get across all devices, wired or wireless. No ISP would ever give you X bandwidth PER device unless you're paying for that rate per device and that's going to be a ton of money. The bandwidth limit happens at the modem/WAN facing router and it rate limits there, it doesn't care how the device is connected. If you're able to adjust your egress bandwidth on the modem your ISP is incompetent and doesn't understand how to secure their devices and firmware.

Posted

Hello everyone,

today I've bought a switch (D-Link DGS-108) in order to connect 2 PCs in my room to my router. I've measured the speeds on both computers and they are as good as can be.

 The problem starts when I measure both at the same time. The speed then gets cut in half. Doesn't happen if 1 PC is on WIFI and other on switch. Does anyone have any experience with this?

Thank you for reading.

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1 minute ago, DodoKrastavac said:

The speed then gets cut in half.

That is how a switch works.

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Posted
3 minutes ago, DodoKrastavac said:

Hello everyone,

today I've bought a switch (D-Link DGS-108) in order to connect 2 PCs in my room to my router. I've measured the speeds on both computers and they are as good as can be.

 The problem starts when I measure both at the same time. The speed then gets cut in half. Doesn't happen if 1 PC is on WIFI and other on switch. Does anyone have any experience with this?

so are you saying that if you have one connection you have E.G 10MBps but if you have 2 1 PC gets 5MBps?

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3 minutes ago, DodoKrastavac said:

have any experience with this?

i think every other person has experienced this

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Just now, Tom_nerd said:

so are you saying that if you have one connection you have E.G 10MBps but if you have 2 1 PC gets 5MBps?

Yes

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3 minutes ago, Smit Devrukhkar said:

That is how a switch works.

From what I know a switch isn't supposed to reduce the speed

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4 minutes ago, Smit Devrukhkar said:

That is how a switch works.

That's not correct. If the switch is 1Gbps, it's for each port, not shared between all ports. 

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Just now, Blue4130 said:

That's not correct. If the switch is 1Gbps, it's for each port, not shared between all ports. 

It's a gigabit switch for all 8 ports

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10 minutes ago, DodoKrastavac said:

I've measured the speeds on both computers and they are as good as can be.

 The problem starts when I measure both at the same time. The speed then gets cut in half. Doesn't happen if 1 PC is on WIFI and other on switch. Does anyone have any experience with this?

How did you measure this speed?

Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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1 minute ago, DodoKrastavac said:

It's a gigabit switch for all 8 ports

Yes, each port is gigabit. The switches total simultaneous switch capacity should be near 8gbps.

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Just now, DodoKrastavac said:

Ookla speed test and fast.com

And you have gigabit Internet?

Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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Just now, DodoKrastavac said:

Ookla speed test and fast.com

Test 1 PC at a time.

Its all correct form what you have said. Its how physics work.
If you have 10 marbles then share them equally with a friend, you dont have 10 marbles you have 5.

When i ask for more specs, don't expect me to know the answer!
I'm just helping YOU to help YOURSELF!
(The more info you give the easier it is for others to help you out!)

Not willing to capitulate to the ignorance of the masses!

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1 minute ago, DodoKrastavac said:

Ookla speed test and fast.com

What is your isp plan? What speeds are you getting? 

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Just now, WereCatf said:

And you have gigabit Internet?

And both PCs get 20-35 when I measure at the same time.

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Just now, HanZie82 said:

Test 1 PC at a time.

Its all correct form what you have said. Its how physics work.
If you have 10 marbles then share them equally with a friend, you dont have 10 marbles you have 5.

I did, if I test 1 at the time it's full speed

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Just now, DodoKrastavac said:

Ookla speed test and fast.com

What's your internet bandwidth?

 

If we assume it's 1Gbps, then testing both at the same time, assuming the connection is balanced near perfectly, you'd expect 500Mbps on each, which adds up to 1Gbps. 

 

Also, even if you have a 2Gbps internet connection, the switch can only handle 1Gbps per port. You've only got one connection from the switch to the router (I assume), so you've got a 1Gbps link between the switch and the router, so you'd still expect 500Mbps on each PC at the same time.

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Just now, Blue4130 said:

What is your isp plan? What speeds are you getting? 

70 Mbits/s tops, 68 or 69 when measuring one PC

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Just now, DodoKrastavac said:

No, I have 70Mbits/s

I don't see the problem, then. I mean, 70Mbps is the maximum speed of your Internet-connection, divide that to two computers at the same time and each will only get half of that.

Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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Just now, DodoKrastavac said:

70 Mbits/s tops, 68 or 69 when measuring one PC

and its 35 per pc when you test them at same time? That sounds about right from a math point of view.

Can i point you to my marble example again...

When i ask for more specs, don't expect me to know the answer!
I'm just helping YOU to help YOURSELF!
(The more info you give the easier it is for others to help you out!)

Not willing to capitulate to the ignorance of the masses!

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1 minute ago, WereCatf said:

I don't see the problem, then. I mean, 70Mbps is the maximum speed of your Internet-connection, divide that to two computers at the same time and each will only get half of that.

The problem isn't there if they are both on wireless, I really don't know what the issue is tbh

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Just now, HanZie82 said:

and its 35 per pc when you test them at same time? That sounds about right from a math point of view.

Can i point you to my marble example again...

Can I point you to the fact that it's a gigabit and not a 70mbit switch

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