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Author Topic: Random internet access drops for wi-fi and broken DHCP reservation!  (Read 5060 times)

Disco-Fever

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Hello hello

For a couple years now the router has been dropping internet access for wireless clients randomly (still connected to the router so not an interference issue?) and I would usually need to disconnect and reconnect to the router to solve it, sometimes it would be 4 times a day other times it would happen a few times a week. I'm on Rev A4 and I've done multiple factory resets, have upgraded firmwares (now on 1.37 EU), turned off unnecessary options, and it is a lot better now but still an infrequent issue (every 1-3 days a couple times).

Now onto the completely fuggin broken DHCP reservation

I reserved dhcp addresses for most devices, a few minutes to a few hours later (could be triggered by rebooting the router maybe) the vast majority of dhcp reserved devices will disconnect and fail to connect to the router via wi-fi, and removing them from dhcp reservation and revoking the ip address does nothing to resolve this (even a restart of the devices and router) and thus my only option is to do a factory reset. However if I were to connect them via ethernet (and hence be using a different mac address) they will connect no problems, and again the last time this happened atleast one of my devices (that was also using wi-fi) on the dhcp reservation did not experience any problems, I had no ethernet connected devices on dhcp reservation.

The other issue is that in my house it is very troublesome to test these things due to interrupting 4 people's internet access, and to make matters worse we are getting fibre optic broadband soon (no, not yay), and with it comes the BT Home Hub 5 (a pleb tier router), and I am completely outnumbered in the decision to use that router over this supposedly superior product which is causing infrequent interruptions of their devices. The main issue I would experience on the Bt Pleb Hub 5 would be Moderate to Strict NAT, as due to multiple xbox's and things I cannot simply port forward (not that that even would necessarily solve the issue).

if it comes to it I will just say goodbye D-Link and move onto a brand that doesn't have an array of annoying unsolvable issues experienced by a fair few of it's users.

But I don't want to do that, I want to save money, solve this riddle, and keep this otherwise great product! So any help resolving mainly the random disconnected would be great! Although the broken DHCP reservation does worry me as it doesn't exactly give me confidence that the router is working properly. I don't remember the router always doing these disconnects (although could be wrong) so could it simple be a case of a faulty/broken 4 year old router?

Thanks in advance, I've been around these parts many times (and dug through google like heck) trying to solve this, and I've seen the great support you guys give!
« Last Edit: November 23, 2014, 07:30:46 AM by Disco-Fever »
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FurryNutz

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #1 on: November 23, 2014, 10:24:12 AM »

    Link>
Welcome!

  • What region are you located?
  • 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?
  • 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.

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Disco-Fever

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #2 on: November 24, 2014, 01:40:04 PM »

Hello hello!

EU (UK)
Yes I've done a factory reset, but I have changed firewall settings to Endpoint Independent and turned off a few features like the VPN aiding stuff, and besides none of this has affected the issue wi-fi internet access dropping issue.

Well I forgot to do a factory reset after updating firmware, but remembered after making some changes and then did a factory reset.

Well I've updated firmware a few times, and I'm not sure how long the wifi issue has been around for and whether it existed when I first got the router.

ADSL
Static WAN IP
20/10 download/upload
My MTU value is 1480, but they didn't tell me! I had trouble connecting to certain "secure" sites, and then googled my way to learning issues caused by the router using an mtu value higher than what the isp actually uses (and how certain sites in an attempt to be secure will block the necessary trasnmission to get around using a too high mtu value, and as such you can never connect to them). But why the fudge do routers not detect mtu value themselves? Or do some do but the DIR-655 in all it's legendary prowess does not?

Are you going to tell me that all wireless clients should have the devices set to use 1480 to connect to the router, because I thought they tested for that automatically?

Reconnect mode is set to always on.

My modem is unreachable to my knowledge, my router is connected via ethernet to a little black box, which in turn is connected via ethernet to a wireless antenna set up on my roof, the ethernet cable provides power and data transmission to the antenna.

But I checked on my router page and it is bridged, I had always assumed it was as I have no NAT issues, and I have no connectivity issues that do not stem from the router.

As I said, when the wi-fi clients have the connection report limited access (so they can connect to the router but not the internet), all ethernet devices remain completely fine and can connect to the internet no problem.

Many thanks!
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FurryNutz

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #3 on: November 24, 2014, 02:20:20 PM »

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?

  • 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.
  • 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?
  • Ensure any devices with WiFi adapter drivers are updated.
  • Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by that maybe causing interferences?
  • Any other WiFi routers in the area that maybe causing interferences? 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.
http://www.smallnetbuilder.com/wireless/wireless-basics/31083-smallnetbuilders-wireless-faq-the-essentials
« Last Edit: December 09, 2014, 09:42:12 AM by FurryNutz »
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Disco-Fever

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #4 on: November 25, 2014, 12:22:33 PM »

I'm sorry if I seem short and I know you're just asking the general necessary questions, but can anyone help me or not?

My issue is not with interference or options causing the wi-fi to drop, as stated the connection to the router is PERFECT, the router deciding to suddenly not allow all wireless clients to connect to the internet is not perfect, as is the DHCP reservation being completely and utterly bonked.

But anyways, I tried 20mhz, I'm on 40mhz, I'm on N only, there's no other devices within the frequency range in our house to cause interference, no houses that close to ours, I'm on manual channel 6 (with 2 being secondary) as it's the best pick out of what my neighbours are doing, WPA2/AES, 3 windows laptops, an ipad air, some android phones, a google phone, iphone 5, a ps vita and an xbox, they're all updated, and I've already looked into and messed around with the other options described.

The wi-fi is not dropping connection, the router is dropping internet access to wi-fi clients, with the fix being to disconnect/reconnect to the router, and dhcp reservation usage causes said devices to be unable to connect to the router some time after, with the only fix being a factory reset!

If I do end up replacing it, as I cannot in good conscience sell this router on, I will instead smash it to a million pieces with a hammer and then burn it, both for fun and for a nice morale release of pent up annoyance, but I'll be sure to post a video of it here (in the relevant board of course).

Adam Twomey
« Last Edit: November 25, 2014, 12:40:28 PM by Disco-Fever »
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FurryNutz

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #5 on: November 25, 2014, 01:02:08 PM »

Does the router still give Internet connections to wired LAN PCs when the wireless devices don't get Internet? If so, then there maybe a problem with one of the devices connecting to the WiFi that maybe causing the problem. I would turn off ALL wireless devices. Factory reset the router with one wired PC and use default WiFi settings. Maybe use channel 13. Then turn ON the first wireless device. Don't set any reservations just yet. Do some testing and check for stability.  Turn the device OFF then turn on the next. I'd graduate going thru your devices and see if you notice anything. You do have a lot of wireless devices.

If your not getting any Internet on wired LAN PCs when the wireless devices stop, then there would be a problem between the router and the ISP modem.

Theres no need to smash the router. I doubt there is a problem with the router. I have a Rev A and it's a solid. You just need to narrow down where the problem maybe. One test you can do as well, take the router or a different location, say a friend, family or neighbor and hook it up there. If the problem follows, then you'll know, if not, then you'll know that there is a problem at your place.

« Last Edit: November 25, 2014, 01:08:23 PM by FurryNutz »
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FurryNutz

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Re: Random internet access drops for wi-fi and broken DHCP reservation!
« Reply #6 on: December 09, 2014, 09:42:43 AM »

Any status on this?  ???

I'm sorry if I seem short and I know you're just asking the general necessary questions, but can anyone help me or not?

My issue is not with interference or options causing the wi-fi to drop, as stated the connection to the router is PERFECT, the router deciding to suddenly not allow all wireless clients to connect to the internet is not perfect, as is the DHCP reservation being completely and utterly bonked.

But anyways, I tried 20mhz, I'm on 40mhz, I'm on N only, there's no other devices within the frequency range in our house to cause interference, no houses that close to ours, I'm on manual channel 6 (with 2 being secondary) as it's the best pick out of what my neighbours are doing, WPA2/AES, 3 windows laptops, an ipad air, some android phones, a google phone, iphone 5, a ps vita and an xbox, they're all updated, and I've already looked into and messed around with the other options described.

The wi-fi is not dropping connection, the router is dropping internet access to wi-fi clients, with the fix being to disconnect/reconnect to the router, and dhcp reservation usage causes said devices to be unable to connect to the router some time after, with the only fix being a factory reset!

If I do end up replacing it, as I cannot in good conscience sell this router on, I will instead smash it to a million pieces with a hammer and then burn it, both for fun and for a nice morale release of pent up annoyance, but I'll be sure to post a video of it here (in the relevant board of course).

Adam Twomey
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Cable:200mb/10Mb>NetGear C7800>DIR-882>DGS-1100>HP 24pt Gb Switch. COVR-3902/2202/1203,DIR-2680,890L,882,880L,868L,DNR-202L,DNS-345x2,DCS-933L,936L and 960L.
Go Here>Router Troubleshooting