The Graveyard - Products No Longer Supported > DIR-855

DIR 855 stops routing but all status shows fine

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ItsGr8:
Been using my DLINK 855 for years. Fantastic product. Now suddenly it stopped routing.
My Ipad and PCs suggests the connection between router and adsl modem is not functioning. When i connect to the wifi network from Ipad a dlink error page shows stating there is no internet connection possible.

Over wifi as well as over direct line connection I can access dlink firmware provided website. all status information suggests everything works well. There is a gateway server and dns assigned. WAN is shown as connected. Absolutely no error vissible anywhere.. When I ping the gateway server listed and the ispprovided dns.. than I do not get through. All packets are lost.

when I connect direct to the cable modem (a cisco device) than everything works... also status page on that device does show any problem.
When I ping the gateway ip and the ISP dns over this connection to the cable modem than i get responses..
It suggests my dlink does not function right.. but what can be wrong ?

I am not able to pinpoint it... already disconnected my DLINK from all cables and power for hours... after reboot I got it working normal again once for about 60 minutes and then it again stopped working.
dir 855
sticker on device states hardware  v A3
firmware v 1.23 EU
When i login to dlinnk router it states HW A2 firmware 1.23 EU

hope you can provide some suggestions
-- lennard

FurryNutz:
Link>Welcome!


* 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 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
* For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled.
* 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 that you have your ISP check the cabling going to the ISP modem, check signal levels going to the ISP modem. For DSL or Fiber service lines, ensure that the ISP is using good working phone or cable lines to the DSL modem and that the phone lines are filtered correctly. For cable Internet, RG-6 coaxial cable is needed, not RG-59. Check for t.v. line splitters and remove them as they can introduce noise on the line and lower the signal going to the ISP modem. I recommend having the ISP service physically check the lines going from the out side to the ISP modem. Connecting to the ISP modem could result in a false positive as the signal to the modem could be just enough to that point then adding on a router, could see problems. The router operation is dependent upon getting good data flow from the ISP modem and the modem is dependent upon getting good signal from the ISP Service.

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 and 5Ghz routers: Try single mode G or N or mixed G and N on 2.4Ghz and single mode N or AC on 5Ghz?
* 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.
* 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.
* What wireless devices do you have connected?
* 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?

ItsGr8:
hi
thank you for the outline. Herewith the response , findings, considerations
my main concern is... nothing was touched - changed.. what happened is the question... how to pinpoint why the router stops routing.

What region are you located?   West Europe - he Netherlands
Are you wired or wireless connected to the router? Both. same problem on wired and wireless
Has a Factory Reset been performed? Not yet. Did not touch the router nor modem for many weeks.
Was a Factory Reset performed before and after any firmware updates then set up from scratch?
FW Update Process No firmware updates have been applied. latest firmware was onboard at time of purchase
Was the router working before any firmware updates? YES... never applied firmware update

Internet Service Provider and Modem Configurations
What ISP Modem Mfr. and model # do you have? Cable modem. Cisco EPC3212. Been working fine
Is ISP Modem/Service using Dynamic or Static WAN IP addressing? seems to be dynamic
What ISP Modem service link speeds UP and Down do you have? measured on modem Down 105 Mbps Up 6 Mbps
Check cable between Modem and Router, swap out to be sure. Link> Cat6 is recommended. Done. not an issue
Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values  NOT yet done
For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled. Always on indeed
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: According to ISP UPC it is bridged already 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.
My modem logon status page is reachabble on http://192.168.100.1 so this is supicious if this means it is not bridged... and my dlink operates on 192.168.0.1 /
Example of a D-Link router configured for PPPoE with ISP Modem bridged: PPPoE Configuration on Router

FurryNutz:
If this happens on both wired and wireless, I'd look more up stream at the ISP modem. Check to make sure if the modem is actually bridge or not. Usually if modems are bridged, you can't access the modems web page.

Ensure that when this happens, ask the ISP to review there logs during this time frame. If the router looses the connection sometimes means the modem has lost the connection too or something in between.

If anything, log in to the 855, save the routers config to file first, then do a factory reset, set it up from scratch and run a few tests. Power cycle the modem as well when you do this.

ItsGr8:
Meanwhile it is clear that the ISP provided cisco modem is in bridge mode.
it apears to work fine. When I connect a pc direct to the modem, all works well
Have done a factory reset on the cisco modem (long press on button on back).. which made no difference
Have also now doen factory reset on the dlink855.. completely set+up the router again manually.
problem still the same, but new clue obtained. The router is not coming online to the WAN anymore. I can see it has DNS information but it does not have an IP nor gateway assigned.
When i disconnect the router from the modem, and connect the cable to the PC i now use.. i do get a IP etc assigned.
suggests to me that the router is not functioning well. the logs are not detailed enough to give more insight if the router is malfunctioning. wondering what I can do next...

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