Limit LAN upload speed (Ping Issues)

jrwagh333 · 31 Jan 2016 at 23:32

When playing CS:GO my ping is fine, say 40ms.

When somebody on my LAN is transferring a file from my PC, it maxes out my connection and up's my ping to around 200ms.

Is there a way to limit the upload speed my PC provides to everyone else on the network?

Steveocee · 1 Feb 2016 at 01:01

You need something like a managed switch or something with a queue ability.

I'm a MikroTik whore and I'll recommend something MikroTik because I know they can do it. Even a basic RB750 router can create a queue which you'd make as a simple
src=192.168.1.X dst=192.168.1.X limit traffic to 500K upload or similar).

What's interesting though is how a LAN connection is causing this, assuming you have a gigabit network thats some pretty hefty data requests.

bremen1874 · 1 Feb 2016 at 01:12

I'd rearrange the network so you aren't serving files from your PC. If it's happening often enough for you to be asking the question I'd just buy a decent NAS.

Avalon · 1 Feb 2016 at 13:59

Does the router support QoS?

bledd · 1 Feb 2016 at 15:17

How is your machine connected to the router?
Get a NAS

Armageus · 1 Feb 2016 at 15:31

Steveocee said:
What's interesting though is how a LAN connection is causing this, assuming you have a gigabit network thats some pretty hefty data requests.

Not really - even a single hard drive can pull 120+ MB/s on a sequential read (e.g. 143MB in the WD Red review below), enough to saturate a gigabit connection (without getting started on SSDs).

As others have said, if file serving is a regular thing, then move it to a different PC or NAS.

references:
http://www.storagereview.com/western_digital_red_nas_hard_drive_review_wd30efrx

jrwagh333 · 1 Feb 2016 at 16:17

Yes the router has QoS but doesn't seem to make much difference.
No I don't want to buy a NAS, I don't want to spend money if I don't have to

Armageus · 1 Feb 2016 at 16:51

jrwagh333 said:
Yes the router has QoS but doesn't seem to make much difference.
No I don't want to buy a NAS, I don't want to spend money if I don't have to

QoS on the router won't make any difference, as the issue is with internal traffic, not internet.

It's all very well saying you don't want to spend money, but the simple answer is you need to remove the file sharing traffic from your PC. Buying a NAS, or using another PC to host the files will solve the issue.

Your network card at best, can send 125MB worth of traffic every second - if all (or most) of that bandwidth is taken up by serving files to others on your local network, then there is no way for your CS:GO traffic to get out without risk of delay.