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150Mbit internet and 100Mbit full-duplex ports

post #1 of 39
Thread Starter 
Okay people, here is the situation,

100Mbit full-duplex ports support 100Mbit download/upload at same time, which is in theory 200Mbit bandwidth.

but let's say I get an internet with 150Mbit download and 50Mbit upload

will it work that way too?
Edited by Cattleclysm - 4/4/12 at 4:27pm
post #2 of 39
I'm *pretty sure* I read that bandwidth is bandwidth and the fact it supports sequential 100 up/down means you're right with the 200mb. So 150/50 should theoretically work.
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post #3 of 39
Actually, 100Mbit full-duplex ports support 10MB up/down at the same time. 1Gbit supports roughly 100MB up/down. Keep aware of the bit and Byte usage with networking devices and ISPs; little b means bit, big B means Byte.

The 150Mbit down and 50Mbit up would be 15MB download and 5MB upload at the same time. You wouldn't utilize your full download capability, but you'd be able to utilize your full upload.

Just because it's 200Mbit total bandwidth doesn't mean that it will share some of it's unused upstream ability with it's downstream.
Edited by SectorNine50 - 4/4/12 at 4:28pm
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post #4 of 39
Thread Starter 
I made typo with MB and Mbit, you get what I'm trying to say

Will my router with 100Mbit full duplex ports handle 150Mbit down 50Mbit up internet?
post #5 of 39
Thread Starter 
Okay fixed MB/Mbit typos, should be easier to understand the situation
post #6 of 39
Ah okay, there we go.

But no, you would still be limited on your downstream. The fastest you'd be able to download would be at 100Mb on one full-duplex link. If you have the ability to team NIC's on your device, you may be able to do some load balancing across them and utilize that last bit, but I don't know of many home routers with that capability (DD-WRT might be able to).

Also, keep in mind that throughput on lower-end models of routers and network equipment may prove a bit slower than advertised when put under full load for an extended period of time.
Edited by SectorNine50 - 4/4/12 at 4:33pm
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post #7 of 39
Thread Starter 
So basically you're saying my download would be restricted at 100Mbit if I got 150Mbit internet even if port is full-duplex?
post #8 of 39
Quote:
Originally Posted by Cattleclysm View Post

So basically you're saying my download would be restricted at 100Mbit if I got 150Mbit internet even if port is full-duplex?

Exactly, yup.

You have a 100Mb downlink, and a 100Mb uplink. They aren't shared, unfortunately.

In my opinion, a gigabit network is worth the extra change anyway, if you have the means of course.
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post #9 of 39
100 Mbit is closer to 12 MB/s and 150 Mbit is about 18 MB/s. Here is my speedtest and on average it's around 154 Mb

1875977556.png

1875979175.png

Also on a 100 Mbit port you will most likely get around 93 Mbit with overhead and full duplex mean you should be able to max upload and download at the same time at 100 Mbit
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post #10 of 39
you will be bottlenecked, 100Mbps will bottleneck a 150Mbps downstream.. the theory of full duplex and 200Mbps is based on data been able to be transmitted in both directions at the same time and is theorectical.. so in effect really with a 100Mbps port, traffic in one direction will be limited to 100Mbps.. smile.gif
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