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[boarder428]

I seem to have a performance problem and am wondering the best way to go about troubleshooting! The network consists of 2 wireless computers, 5 wired computers, a D-Link 655 Xtreme N router and a D-Link DGS2208 8 port gigabit switch. I have 2 computers hardwired to the router and 3 computers hardwired to the switch. It seems to me that the computers wired to the switch are the slowest. The wireless performance is actually better than the wired performance. Most of my pc's all dual boot windows and a version of Linux and performance problems are the same no matter what os is booted.

I'm wondering if all pc's should be wired to switch and only one wire to router from switch or does it even matter? I've done the whole re-boot modem, switch, router thing many times which is what my ISP has me do but since wireless performance is fine I am leaning towards a cable or switch issue.

DGS-2208 has HW version C1
DIR-655 has HW version A2 and Firmware Version 1.21

[Alanroseman]

Hello,

90% of network slowdowns result from poor cabling.

If you're using older cable in your network your bandwidth will be restricted.

CAT5 - 100 MHz - headroom
CAT5e- 350 MHz Headroom
CAT6 - 500 MHz headroom.

Are your computers connected to the switch directly with patch cables?
Are they plugged into wall outlets and traveling back to a patch panel?
Did you make your own patch cables?

Try plugging the computer into the switch with a CAT6 patch cable...  I'll bet it flies...

Alan Roseman
www.Fastnetworks.biz
Master Network License RI 2669

[tipstir]

Prior setup with DIR-655 A3, For each external switch you have there should be one connection to the router switch port. So in the image you can have 3 external switches. Today I just have 1 / 16-port switch for 100mbps connections and 1 / 8-port switch for 1000mbps connections.

More info by me here

[boarder428]

my cables are all purchased cat 5e cables patch cables, connected directly to switch or router.

[Backdoctor52]

my cables are all purchased cat 5e cables patch cables, connected directly to switch or router.

I have basically the same layout, with an RCA Cable modem, DIR-655 (FW: 1.34NA  HW: A1/A2), DGS-2208 and DNS-323, but the main difference is that I purchased all pre-made CAT6 cables (even the short ones), and all computers are connected using the 10/100/1000 network capability on the PC motherboard, or have an installed DGE-530T network card.

Also, the router only has one connection, to the switch, and the switch manages all the connections to the computers, DNS, and also one Netgear HDX101 for a very long run (at 10/100 MBps). I seem to have a lot of spare capacity, with no problems streaming from the net. (even though my ISP only provides about 14-15MBps)

I would add some pictures here of the network layout using network magic pro, and of the network tower, but have not found the means to display it here.

I have found that using cat 6 (or cat5e) cables longer than 25ft gives major reductions in speed (it will only connect at 10MBps), and interference due to proximity of power cables is a major factor.

Hope that helps

Derick Bartelings