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[johanw]

Hi,
I have recently upgraded from ADSL to 100M fiber connection. I am using the same DIR-655 as before but have started to experience some strange problems. On random intervals are the devices losing the connection to the routers. This is both on the wireless and wired connections!
I have an XBOX360 connected via wire and a couple of PCs connected both wireless and wired. The connection is lost for a short period and the device re-establishes the connection to internet automatically.
The downtime is long enough for a gaming session to be lost or internet browser to timeout. I have tried to find any fault information in the logs in the router but not found anything that helps me. No error messages ony information log entries. The router claims that the WAN connection has been up all the time (now 7 days+ uptime). When the connections are up and running I have very good down/uplinks and low latency (Down 95M, Up 13M, latency to test server <2ms).

Can anyone help me to troubleshoot this problem so I know if the problem is in my router or at my ISP.

Current Firmware is 1.31EU.

Thanks for your help!

[FurryNutz]

What ISP Modem make and model do you have?
If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems.
To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged.
If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.

Some things to try:
Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options. Advanced/QoS or Gamefuel.
Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual.
Turn on DNS Relay under Setup/Networking.
Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking
Ensure devices are set to auto obtain an IP address.
Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
Enable uPnP and Multi-cast Streaming under Advanced/Networking.

What wireless modes are you using? Under Setup/Wireless/Manual.
Try single mode G or N or mixed G and N?
Try single mode G or mixed G and N on 2.4Ghz and single mode N on 5Ghz?
Channel Width set for Auto 20/40Mhz or try 20Mhz only.
Try setting a manual channel to a open or unused channel.
What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto.
What wireless devices do you have connected?
Any cordless house phones?
Any other WiFi routers in the area? Use InSSIDer to find out.
Turn off Short GI, WLAN Partition and Extra Wireless Protection if you have it. Under Advanced/Advanced Wireless.

Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
Turn off all devices accept for one wired PC while testing.

Check cable between Modem and Router, swap out to be sure. Cat6 is recommended.