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[SAINT1976]

I run a DIR-635 behind a ISP provided modem, along with a Toshiba Satellite laptop and a network attached storage device. The overall Internet connection seems alright but the NAS access speeds are very inconsistent, especially when transferring files to/from the NAS unit, and sometimes file transfers are even interupted followed by error messages stating that the NAS unit (or file) is unavailable.
 
I can sometimes also tell from the Network connection indicator in the Windows toolbar (I use Win 7) that the connection speed goes up and down.

The problem is that I don’t have enough knowledge in this field to figure out which part of my network that’s causing this problem, ie. whether it’s the modem, the router, the NAS unit or if it’s some sort of setting that I’ve overlooked.

Any input to help me identify this problem and also to help me optimise the speed is highly appreciated.
Thanks in advance.

[FurryNutz]

It's probably due to the router having some impact on the network as it's trying to handle traffice from the Internet and network on the LAN side. It's preferred to connect a external switch to the router, then connect all of your wired devices to the network switch. This will eliminate any router interference between PC and NAS however still get Internet just fine. Let us know what you think.

[SAINT1976]

Thanks for your reply FurryNutz.

Any specific specs i should look for in a switch?

Cheers!

[FurryNutz]

What region of the world are you in?

D-Link DGS
HP JD869A#ABA V1405-5G <I prefer HP 
NETGEAR GS

These are all Gb switches and backwards compatible. I recommend upgrading to Gb on everything on the LAN side and use Cat 6 cabling. It's cheap and works great.

Let us know what you do.

[SAINT1976]

I live in Sweden.

I'll check out on these products asap and will keep you notified.

Once again, many thanks for your help.

[SAINT1976]

Hi again!

I added a D-Link 5-Port Switch DGS-1005D 10/100/1000 (Gigabit) to my setup this week and a cat6 cable between the switch and the Synology NAS. I haven't done any hard-testing on the equipment yet but after some minor upload tasks it seems as if the speed increases somewhat at least. 

I'm not sure if my Synology DS210j supports Gigabit networking, but would it gain the network speed if I replaced my Dlink Dir-635 with a new router, e.g. Dir-655?

Also I'm not sure if the network card (802.11b/g/n) could be another weak spot in my network. What do you think?

Thanks!

[FurryNutz]

If you have everything connected to the switch, i.e. PC and NAS, speeds should be very good, however other things could interfere with speed, yes, your NAS if it's not supporting Gb connections, If your using wireless, then that will effect transfers, specially if you can't get N modes.

I do recommend wired if your needing connectivity with the NAS. Wireless at best will see 8-maybe 15Mb per sec at the highest and thats just the nature of WiFi. I have my MacBook Pro set up on 5Ghz N only mode running thru a AP thats also set up for N mode at 5Ghz and at best I see maybe 10Mb sending files to my wired server on a Gb connection. Wireless is just funny this way, the connections are different and speeds are different when using wireless. If your trying to run wireless thru the router and connect to the NAS, I might presume that the router regardless of any router you use might be the bottle neck and thats just how routers work, there job is to route data and thus can impose speed performance slowdowns. Why it's best to run wired if you have high traffic or streaming large items from servers or NAS. It's just hard to push large data chunks thru the air waves.

You can try setting the router to Single N mode and see how it goes. You'll need to make sure your wireless card can support single modes. Most of them do now days. Test with security OFF then test with using AES a only if your wireless card supports it. Also test with your PC wired to the switch and send and copy files from the NAS. I bet you'll see upwards of 50Mb on wired. I do.

Keep us posted.

[SAINT1976]

I'm having trouble finding the settings for N - I simply don't know where to find it (in the routers web interface).

I have a realtek RTL8191SE card supporting 802.11b/g/n in my Toshiba laptop.

The Internet wall socket is situated in the living room as is the entire setup (excluding PC) so unless using a Home Plug device I'm not sure if physically connecting the PC and NAS is an option.

I've tried to connect the PC and NAS using a cat5e 1 meter cable, both directly and through the switch. The transmission speed when transferring a .flv file of 23 MB was around 3 mb/s through the switch and ~4 mb/s when connecting the PC straight to the NAS.

[FurryNutz]

Wireless settings are under Setup/Wireless/Manual.

[SAINT1976]

Thanks!

Ok, so I'm currently running 802.11n only and AES only. Can't see any noticeable difference in speed though, around 1-2,5 mb/s.

[FurryNutz]

ya, could be your Wireless adapter could be a bottle neck too.
Any security SW running on the PC while your transferring files?
How far away are you from the 635?

Turn off Short GI and Extra Wireless Protection if you have it. Under Advanced/Advanced Wireless.
Does turning off WMM enable have any effect ON or OFF?

[SAINT1976]

Hi!

I'm running Zone Alarm Free and AVG Free on my PC. My PC is around 8 meters (~25 ft.) away from the router.

If I turn off Short GI and Extra Wireless Protection and WMM enable "all associated wireless clients will get disconnected". Does this (only) mean that I will have to log these clients back on to the network? (daft question perhaps )

[FurryNutz]

Can you test with a bit closer?

Yes you'll get disconnected only because you are changing the WiFi configuration and the router has to quickly turn off the wifi and make changes then back on. Happens on all routers.

[SAINT1976]

Hi,

I turned off Short GI, Extra wireless protection and WMM enable. Then I tried to copy 2 the same 23 MB .flv files from my nas to the PC averaging under 200 Kb/sec...

[FurryNutz]

Reenable WMM Enable...