Wireless Router Bridge (WDS) multiple issues

Smc Smc smcwbr14-g2 barricade g 2.4ghz...
April 13, 2010 at 18:34:51
Specs: Windows 7
Hi,

I recently purchased a couple of Wireless Routers (SMC SMCWBR14-G2) that configured as a WDS bridge. The setup is pretty simple: Connected one to WAN and configured it as the DHCP and the other is used simply as a switch. I actually purchased two not because i needed to cover a large area, but because it was cheaper than purchasing 3 USB or PCI Wireless adapters for my Desktop computers. I am connecting a couple of laptop, plus 4 desktops to the network. The 2nd wireless router is simply used as a Switch... could not actually find a wireless switch, did not need the second WAN port, etc... anyway my issues are speed related.

Ever since i added the second wireless router, my speed connection varies in a sinousoidal for from 650K to 30K. Could this be because the two routers are too close together?

My second issue and the most important is that i can't get decent speed between LAN computers. Event he wired ones get crappy speed around 10Mbps (i was getting 80-60 using a crossover cable. But the dramatic issue is that if i try to copy Files from the Wireless laptop to one of the wired laptops i get 100K speed!!! I can download files from the internet from a server located in bangladesh 5 times faster than i can from the room next door... it's just ridiculous... am i missing something in terms of configuration?

Here is short summary of my Speeds:
From Wireless to Wired diff router
~100 - 300 Kbsec
From Wireless to Wired same Router
~1.1Mbsec
From Wired to Wired same router
12-13Mbsec
From Wired to Wired Crossover cable (all cards are 1000 Gigabit Ethernet)
60-80Mbsec
From Wired to USB Drive
35-40Mbsec

Any thoughts ideas are most welcomed.


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#1
April 14, 2010 at 07:35:59
First you need to understand the basics of wireless networking.

Wireless is a convenience. You pay for the convenience with the inherent lack of security, latency issues, and loss of bandwidth.

Ever since i added the second wireless router, my speed connection varies in a sinousoidal for from 650K to 30K. Could this be because the two routers are too close together?

Correct spelling is "sinusoid. How far apart are the routers? Are they operating on the same channel? If they are on the same channel, you need to change them to something like 1 and 11 so they don't overlap and interfere with each other.

My second issue and the most important is that i can't get decent speed between LAN computers.

As I said above, your trade off for the convenience is loss of bandwidth and excessive latency. I bet if you check you'll find wireless clients connecting to the same router have better bandwidth than clients on different routers.

I doubt there's anything wrong with your setup, I suspect the issue is the medium................wireless. If you want consistent connections with excellent bandwidth go wired.


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#2
April 14, 2010 at 12:03:34
Keep in mind, that each AP in a WDS will reduce the bandwidth.
Half of the bandwidth is used for data transfer, the other is used for the WDS devices to communicate.

The initial requester should always write the last response !!!


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#3
April 14, 2010 at 13:35:11
Thanks for the replies...

*sinusoidal form.

They are about 5m from each other with a wall between them. If i had them on diff channels then i would not have a WDS setup.

Trust me. If i could go wired i would! Unfortunately i cannot drill holes in the walls to pass the cables.

Still that does not explain how i can get files from a server in Singapore faster than i can from the room next door. There is something inherently wrong with these routers. Even between wired clients it is much slower than using a crossover cable, 5x times slower, as my numbers show.


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Related Solutions

#4
April 14, 2010 at 14:10:50
From Wired to Wired same router
12-13Mbsec

Did it mean Mb/sec or MB/sec?
Mb/sec - Megabit per second
MB/sec - Megabyte per second

Because if it is 12 MB/sec that means it's ~100 Mbit/sec and that's the limit of the routers switch.

The initial requester should always write the last response !!!


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#5
April 14, 2010 at 15:12:19
wholly crap totally forgot that it was a 100Mb switch and not a Gigabit, guess i will have to reuse the gigabit switch... thanks for pointing that out. I was wondering why on earth with a cross over cable it was much faster, and with my gigabit switch as well.

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#6
April 14, 2010 at 19:51:10
Yep, figure it out and let us know, how it works.

The initial requester should always write the last response !!!


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#7
April 15, 2010 at 07:59:17
It looks like Paul's got you on the right track.

They are about 5m from each other with a wall between them. If i had them on diff channels then i would not have a WDS setup.

I've never tried to make a WDS with two routers so I didn't know they had to be on the same channel. My bad so please excuse me for suggesting it may be an interference issue!

Depending on the location of the heating ducts in your house, it may be possible to run a cable through the ducts. Most duct is run under the main floor of houses and have registers that mount on the floor. If this is true for the two rooms your router's are in, you could try running a cable from the register in one room through the duct to the register in the other. You would need a fish tape to do this though.


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