Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[failtolawl]

Hello, I am having issues with this router.

Before I begin, this is undoubtedly my router, because my Internet works on the main computer when it bypasses the router.

When I use the internet for a period of time, such as streaming shows on a smart phone, playing an online game, or simply talking on teamspeak. My connection, on these wireless devices, drops for about 5 seconds. On smart phones it means I lose my stream and have to find it again, and on online games it means I lose connection to the server, just to have my connection back after I get dropped.

My Internet does a 20 mb download speed and a 10 mb upload speed with 15 ping. Yet when downloading the graph is very unstable.

When the router struggles to work the Internet it blinks blue, sometimes it goes orange.


There is no devices in between the router and the adapter when this happens.
The router is warm, but not hot.
Firmware is up to date.

I saw the list that is copied and pasted that contains about 50 steps of fixing a router, but I would rather know what the issues could be rather than a guessing game that will take 5 hours of resetting a router and possibly resetting my router settings.

Thanks for your help!


EDIT: I should probably add, it works for about a half hour to an hour after a power cycle, then it resumes.

[FurryNutz]

Link>Welcome!

• What Hardware version is your router? Look at sticker under router.
• Link>What Firmware version is currently loaded? Found on the routers web page under status.
• What region are you located?
• Are you wired or wireless connected to the router?
• Has a Factory Reset been performed?
• Was a Factory Reset performed before and after any firmware updates then set up from scratch?

FW Update Process

• Was the router working before any firmware updates?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?
• Is ISP Modem/Service using Dynamic or Static WAN IP addressing?
• What ISP Modem service link speeds UP and Down do you have?
• Check cable between Modem and Router, swap out to be sure. Link> Cat6 is recommended.
• Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values

[failtolawl]

Hardware: B1
Firmware: 2.10NA
Region: North America
Both wired and wireless, but the wireless devices have the issue.

No a factory reset has not been performed and is a last resort.
There has been no recent firmware updates.




Comcast Cable
SML D3GNU
H/W 2A
Dynamic IP

Speed tests:
Wired: 55 mb/s Down (solid line), 10 MB up
Wireless Computer: ~15mb/s Down (fluctuates), 10MB up

In regards to MTU, the max I can do results in 1500.

[FurryNutz]

Can you confirm the model of your ISP modem?

Is this your modem? http://www.speedguide.net/routers/smc-smcd3gn-res-docsis-30-draft-n-wireless-cable-536

[failtolawl]

Shoot, I did some typos.

Model is SMC D3GNV

Comcast provided.

http://www.speedguide.net/routers/smc-smcd3gnv-docsis30-multimedia-voice-gateway-933

[FurryNutz]

• If the ISP modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. 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. Also check the routers DHCP IP address maybe conflicting with the ISP modems IP address of 192.168.0.1. Check to see if this is the same on the ISP modem, and if modem can't be bridged, change the DIR router to 192.168.1.1 or .0.254.
  Example of a D-Link router configured for PPPoE with ISP Modem bridged: PPPoE Configuration on Router

I recommend getting the ISP modem bridged if possible then lets go from there...

[failtolawl]

Under the WAN ip address field the number is 10.0.0.2

Does that mean it's bridged?

[FurryNutz]

eh, I don't think so, private IPs can be 192, 172 or 10.

Public IP start with number higher than 10, usually and us the following format: ##.##.###.###

I'd ask your ISP about getting a public IP address on the 655 router. You could put that IP address into the modems DMZ and see how it works...

[failtolawl]

Ok, how can I access my modem and change these settings?

[FurryNutz]

You'll need to consult the modems user manual/ISP to see if it can be accessed. It should be however be aware that some ISPs lock down there modems if you don't own it.

Comcast supports BYOM as well and I would recommend a Motorola SB 6 series stand alone modem if you can't get the SMC bridged or use the DMZ.

[failtolawl]

Alright, I am going to ask comcast about the bridging thing later today, my WIFI is not sluggish or anything when it works (although I suppose 15 mb when it should be 50 mb is one thing),

it just decides to cut out for a couple seconds or resets its connection when I am using it.

Is there any other settings that could cause the router to reset? It does it when I am streaming things, although it doesn't seem terribly hot, could it be overheating?

[FurryNutz]

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion and Good Neighbour Policy

• Ensure the default (dlink) SSID name is changed. Can be anything and not something that's already in use by any neighboring WiFi routers. Under Setup/Wireless/Manual.
• What wireless modes are you using?
• 2.4Ghz Routers only: Try single mode G or N or mixed G and N?
• Channel Width set for Auto 20/40Mhz or try 20Mhz only.
• Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear. 13 for EU regions. Try channel 48 or 149 on 5Ghz.
• 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 TPIK and AES.
• Ensure any devices with WiFi adapter drivers are updated.
• Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by?
• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many? Use v3, its free.
• If you have any of these options, Try turning OFF or ON Short GI, WLAN Partition, Extra Wireless Protection and HT 20/40 Co-existence if you have it. Also testing with HT20/40Mhz Co-existence enabled will impact results as well. I prefer to use this option OFF. Recommended settings are default. Under Advanced/Advanced Wireless.

Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.

PC 3rd Party Security Software Configurations

• 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 LAN PC while testing.
• Disable any downloading client software managers, i.e. Torrents or similar.