Router setup help

Hi All,

I have a few routers at my workplace.

First of all, my network looking like that:
IP range:
DNS1: (file server, remote desktop access server)
DNS2: (mail server and DHCP server)

I have configured some the routers like that:

DHCP: dispabled
Wireless access is configured. Usually security is set to at least to WEP 64-bit (older router) or WPA/WPA2-personal (on the new routers). I have 4 different routers configured like that (of course with different network IP).

It is working good until few weeks ago one of my new router's starting to refuse forwarding internet (all others working fine still). I thought maybe they broadcasting on the same channel so I have changed it. A week later it refuses the internet forwarding again (I can reach it through the network, change settings, etc) until i perform a reboot. After the reboot everything is fine again.

What did I do wrong, please help me.

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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
Have you checked for firmware upgrades?  I had a similar issue with a TrendNet and D-Link router
agriboy1980Author Commented:
Thanks for the advice, and what do you about the CHANNEL setting?

Is it a problem if they are broadcasting on the same channel?
Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
It shouldn't.  If you have more than a couple of wireless access points then it might be worth your while to implement a proper wireless infrastructure allowing users to use same wireless across a large area.  We are actually using the same wireless setup and SSID across all operations (about 2500 users).
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agriboy1980Author Commented:
If I understand right, you have all of you router's wireless settings configured to use excatly the same settings?
Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
We wireless controllers which provisions and manages access points which allows hand offs from one AP to next.  With the controller, configuration is pushed to access points and they are all same.
agriboy1980Author Commented:
Can you provide me some device names / types for this coniguration pls?

Soulja53 6F 75 6C 6A 61 Commented:
I'm confused. Why do you have four routers for one subnet? Do you mean access points? In regards to the channel, you can use the same SSID, but you want to put them on different channels. Such as 1, 6, 11, then 1 again when the two using channel 1 being the farthess apart. Wireless controllers are the way to go for a large network with many AP's, but for your size network with only 4  it would be overkill.
If you use the same SSID like Soulja suggests you must use the same security(WEP/WPA/WPA2) on all access points as well as the same security key.  That way as wireless devices roam they will always have coverage.  Make sure that all APs are on different channels or as Soulja suggested, make sure the units with the same channel don't overlap coverage areas.
Also, when your AP doesn't allow devices on the internet you should verify that the device is getting a valid IP/DNS/Gateway setting from your DHCP server.  This is a common problem with wireless and is usually corrected by rebooting the AP but if you have APs that have overlapping zones that are using the same channel this can also happen.  Firmware updates can also help correct this problem.  You can put INSSIDER on one of your laptops to verify signal strengths and channels used.  INSSIDER is a program that is available on the internet to help troubleshoot wireless installations.  You can also look for wireless routers and APs that may be interfering from and external source.

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