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[ph0enix]

I would like to narrow down the issue with the DIR-685 DHCP Server, and I believe the DNS Relay setting in Network Setup is the problem. I'm just going to post out on what I've found for anyone that is interested to try out.

After finally getting the chance to test the router, and the first thing I done was connecting my laptop without a static I.P letting the DHCP server to allocate the I.P. But as usual it will allocate a random one, which isn't in the DHCP table. This will only happen to people if they leave the router for more than 24 hours. So if I enable an static I.P within the DHCP table it works like a charm, but I don't like to set the static I.P manually everytime I decide to connect to a D-Link router. But if I disable the static and assign the DNS to the router, I have connection to the router? But it will just provide an random I.P outside the DHCP table, which would prevent me connecting on to the internet. As I kept toggling settings, I wondered what would happen with disabling the DNS Relay. After disabling the DNS relay I put auto I.P and within a few moment, the out of range DHCP was corrected.

The DNS Relay is a method of caching DNS queries, to shorting down response time. But I think that the memory allocated gets full and effects the DHCP server? Anyone can shed some light on this. or perhaps test this out? But I don't know how long the effect are, or whether it just cleared the cache, as I just done the test now.

This problem effect me and my friend (on a different D-Link model), and I would like to know why.

FurryNutz: Not sure why you locked the thread, but started a new one.... The reason that I don't speak to D-Link themselves is due to not having the product with me, I work away from home. And I want to narrow  the issue before I speak to them. This test would help if any other users that is effected by this can help


Update:
With the DNS Relay Off, it will automatically disable the "Advanced DNS Service" (Found in Internet Setup) which could also be causing the issue.

So far all my mobile devices now works without static I.P, I'm going to leave this here.....though I wish I've figured this out earlier, didn't think the relay was useless.

Connections:
Modem

• 2xVirgin Super Hub Netgear VMDG480
• Motorola SURFboard SB5101U (Previously same problem, used with 10Mb connection)

ISP:

• Virgin Media 30Mb connection
• Virgin Media 100Mb connection (My friend)

Router:

• DIR-685 Hardware Version: A1 Firmware Version :2.01 ,  Wed 09 Mar 2011
• DIR-815 Hardware Version: A1 Firmware Version :1.00 Fri 06 Aug 2010

Virgin Media DNS servers:
194.168.4.100
194.168.8.100

Ping is now lower 20 ms (DNS Relay OFF) compared to 35 ms (DNS Relay ON)

Update: Next Day (Est. 20 Hours with DNS Relay off and no reboot)
While my mobile device was still connected to the WiFi over night, the connection was fine. But then I decided to turn the WiFi off and on, the mobile had trouble obtaining I.P address again . Didn't help I forgot to get the log setting on, but not sure if it was a fair test consider the DHCP Server was on for 10 days. Turning the DNS Relay off didn't rebooted the router, so I figure I change the internet setup, dynamic IP and input the DNS Server manually.
Primary DNS Address :      194.168.4.100
Secondary DNS Address :    194.168.8.100
MTU : 1500

Will give the router an full shut down, and ask my brother to continue monitoring the router. As I'm away in the weekdays... but toggling the DNS Relay seems to clear the cache needed for the DHCP to function again.

Anyway if anyone can help do the following:

Instructions:

• Setup > Network Setup > Router Settings Enable DNS Relay  = unticked
• Check that the DHCP is working, post your results
• Reboot Router

Effects:

• Lower ping  

[FurryNutz]

You can also input manual custom DNS addresses under Setup/Internet/Manual.

[ph0enix]

FurryNutz: Yup all inputted, within the Internet Setup. The ping is much lower now, but after 6 hours yesterday evening with the manual DNS Server and reboots. Several mobile devices could not obtain I.P addresses, I've checked the log. It does not even detect anything... nothing. Manually putting the static I.P it works, toggling the DNS Relay actually helps kicking the DHCP to work. But that is the only way to get the DHCP working, my friend router the same. So he reverted back to static I.P.... is kinda un-reliable toggling the DNS Relay.

Update: Rename topic name, not a solution. But a temp solution without restarting......
Wired devices detect fine (90% at the time), but Wireless has alot of issue with the DHCP.

Will test out again next weekend.......

[FurryNutz]

You setting static on the devices or reserving them on the router?

[ph0enix]

I've reserved 24 devices on the router, DHCP server start from 192.168.1.100.

With the DHCP not allocating the device to the static I.P address I've assigned on the router, I have to manually set each of the devices with static I.P to get it working. Logs doesn't state any connection attempt for obtaining I.P. for the devices I've used, probably why I've turned it off long ago.

Summary:
When the DHCP is working and the device is connected (With auto-assign I.P) it will continue to work. But when I need to reconnect the device after several hours of uptime, the router will stop providing the device with an I.P address. On mobile devices it will not provide a I.P address, on laptops it would just provide an I.P outside the DHCP table.

I would like to just set the I.P on the router and all my devices on auto-assign. Reason I need reserving I.P on the router, for port forwarding and drive map.

Hope that explain more about the situation....

[FurryNutz]

Have you tried a clean factory reset and set up the router from scratch with only reserving say maybe 10 reservations? I'm wondering if the amount of reservations is a cause of this.

I might go back and do a clean factory reset, load the save version or maybe down grade to v2.00 FW, factory reset once more then set up from scratch. Don't load any saved configuration files. Need to try and rule out any configuration issues here if possible.

Do you need all of the 24 devices set up in reservations? Are they all online at the same time? I know it's preferred here however in troubleshooting, we need to see if we can narrow down the root cause if we can. So if you can input say 10 reservations for the higher priority devices needing to be online, and lets leave OFF the others while your testing if you can. Let the lower priority devices get a auto DHCP assigned address. See now this does. Maybe graduate adding a few at a time initially.

Reason for mentioning downgrading FW is that v2.01 only has a WPS fix which wouldn't effect any thing and really isn't needed unless you really use WPS. I recommend disabling WPS if your don't use it anyways.

Let us know...

[ph0enix]

I've done multiple factory reset, have yet to figure this one out. But I have the WPS disabled anyway, the Firmware 2.02 contains the WPS fix, here the full release note.

DIR-685 Firmware Release Notes
---------------------------------------------------------------------------------------------------------------------------------
Firmware: FW v2.02
Hardware: Rev.A1
Date: 2012/01/18

Problems Resolved:
Enhance WPS-PIN security concern

---------------------------------------------------------------------------------------------------------------------------------
Firmware: FW v2.01B02
Hardware: Rev.A1
Date: 2010/11/30

Problems Resolved:
Closed a publicly disclosed potential vulnerability

--------------------------------------------------------------------------------------------------------------------------------
Firmware: FW v2.00
Hardware: Rev.A1
Date: 2010/03/29

Problems Resolved:
1.   Fix Frame Channel reset channel binding issue based on Frame Channel’s changes on this feature algorithm.
2.   Fix HNAP test tool fail on item WlanRadios
3.   Fix WoL failures on PPPoE mode.
4.   Improve multicast streaming application in Singapore.
5.   The SPI (Xmas attack) will drop some packets which are not attacks.
6.   The USB quick unplug/plug will cause the device reboot

Enhancements:
1.  Add DLNA functions- Media server, media controller and media renderer.
2.  Allow the user to change the setting of the SAMBA workgroup
3.  Add new photos display service channel –Microsoft “frameit”
4.  Support SAMBA share name support in open mode.
5.  Add the Frame Channel’s new authentication method.

Known Issues:
1.  When user changed the device login password, the user cannot log out to test if the new password
    is working properly. Need to wait until the device times out. This will be improved in next release.

--------------------------------------------------------------------------------------------------------------------------------
Firmware: FW v1.01
Hardware: Rev.A1
Date: 2009/08/10

Problems Resolved:
1.  Redirect to Blocking web page when access website is blocked by website filter.
2.  Change the panel clock format from 24 to 12 am/pm.
3.  This version cannot be downgraded to previous version.

Enhancements: .
1.  Support Advanced DNS Service
2.  SharePort utility only supports PC SharePort Utility v1.10 and MacOS SharePort Utility v1.10.

--------------------------------------------------------------------------------------------------------------------------------
Firmware: FW v1.00
Hardware: Rev.A1
Date: 2009/04/07

Problems Resolved:
N/A. (First Firmware Release)

The DIR-815 has firmware version 1.00 with the similar bug. Though there is a DHCP reservation fix with firmware 1.01b14 patch 03 date: 2011/12/7, will have to ask my friend to install this firmware but he has his doubts.

DIR-815 Release Note
===============================================================================
Firmware: DIR815A1_FW103b01.bin
Date: 2012/03/09
1. Change band width default from HT20 to HT20/40 auto.
2. Formal release for lab-in.


Firmware: DIR815A1_FW102patch03b06.bin
Date: 2012/03/09

1. 1.remote access loopback issue.remove web server bind interface on wan interface.
2. virtual server and port forward loopback issue.the rule leak newline.


Firmware: DIR815A1_FW102patch02b06.bin
Date: 2012/02/23

1. To fix a bug for that a strange STA(DWA-133) make us to calculate wrong data rate when coexistence function is enabled and we need to fall back to 20MHz.


Firmware: DIR815A1_FW102patch01b06.bin
Date: 2012/02/14

1.when opening schedule menu with Safari browser, then the Safari displays a page with HTML script.
2. enable/disable QOS engine show some error message, the setting can not be saved.


Firmware: DIR815A1_FW102b06.bin
Date: 2012/01/19

1. Fix pin lock function fail after doing PBC success.


Firmware: DIR815A1_FW102b05.bin
Date: 2012/01/17

2. match dlink behavior.


Firmware: DIR815A1_FW102b03.bin/ DIR815A1_FW102b04.bin
Date: 2012/01/17
1. this version should be ignore.(have some issue.)


Firmware: DIR815A1_FW102b02.bin
Date: 2012/01/16

1.When user WPS is configured after upgrade new F/W ,the PIN lock should be enabled.


Firmware: DIR815A1_FW102b01.bin
Date: 2012/01/13

1.WPS pin lock from dlink request.


Firmware: DIR815A1_FW101b14_ patch03.bin
Date: 2011/12/7

1. Fix DHCP reservation issue.


Firmware: DIR815A1_FW101b14_ patch02.bin
Date: 2011/08/3

1. After the PPP on demand mode idle timeout trigger IP down, the LAN PC can’t trigger PPP dial via broswer. Web will show 404 error page.


Firmware: DIR815A1_FW101b14_ patch01.bin
Date: 2011/07/29

2. After setup the PPPoE connection over Setup Wizard the Reconnect Mode is Always on.Please set to On demand and the Maximum Idle Time to 5 minutes.
3. It is not possible to set the DHCP Server range to offer only one IP, e.g. range = 22 – 22 Else I get the error message that the Start IP address has to be shorter than the End IP address.
4. Remote Management doesn’t work when try to connect with DynDNS address.
5. After setup the PPPoE internet connection over the DCC the Reconnect Mode is On demand
6. Language Pack issues(extend language mtd size to 128K,and merge IPV6 string from DIR-645)



Firmware: DIR815A1_FW101b14.bin
Date: 2011/05/12

7. Fix ipv6 wizard issue with static ip.
8. Fix ipv6 autodetect bug and static have two ip issue.


Firmware: DIR815A1_FW101b13.bin
Date: 2011/05/11

1. SLACC &DHCPv6 rdnss, PC can not get ip.
2. Fix issue that user can set link-local address in LAN.


Firmware: DIR815A1_FW101b12.bin
Date: 2011/05/10

1. PPPoE shared mode PC can not get ip.
2. Wizard cannot work.


Firmware: DIR815A1_FW101b11.bin
Date: 2011/05/06

3. Fix error checking on IPv6 page.


Firmware: DIR815A1_FW101b10.bin
Date: 2011/05/06

4. Update setting page about IPv6 follow DLINK spec.


Firmware: DIR815A1_FW101b09.bin
Date: 2011/04/22

1.Follow DLINK F/W naming rule.
2. Add RUSSIA pptp and RUSSIA pppoe back
3. fix 404 error page contrack cache issue.



Firmware: dir815_v1.01b08_patch01_b4fb_beta.bin (Beta to support)
Date: 2011/04/15

1. Beta to support to fix bug pptp server ip address can’t enter more than 15 character



Firmware: dir815_v1.01b08_patch01_b3se.bin (Beta to support)
Date: 2011/03/28

1. Fix bug: When port scanning on port 0 and 1 in PPPOE mode, our status is CLOSED instead of STEALTH



Firmware: dir815_v1.01b07_b2pg.bin
Date: 2011/02/25

1. Add syslog feature.



Firmware: dir815_v1.01b06_b1qi.bin
Date: 2011/01/26

2. Fix : pptp l2tp not work with some servers
3. Fix : UPnP messages cannot be handled correctly when smart404 is enabled
4. Fix : google browser can’t upload language pack



Firmware: dir815_v1.01b05_abia.bin
Date: 2010/11/18

1. The 2.4G mac as wan mac.Let the 5G and 2.4G have different mac.
2. Fix the PS3 dhcp client cause the dhcp server panic.



Firmware: dir815_v1.01b04_abch.bin
Date: 2010/11/12

1. Fix wlan 5g led error.(also issue on previous version No,345)
2. Correct 404 error page style(No.347)
3. The NETWORKING PAGE will error when the LAN PC have wide character hostname.
4. WAN dhcp mode fail with ZIPB adsl modem.
5. Port forwarding rule fallow DLINK US request.
6. UPNP IGD sometimes function fail.(No.350)
7. Remove the Russia PPTP and PPPoE ,that dlink PP request.
8. Do not save password when the config backup(dlink request).
Buglist fixed:
No: 351,334,320,319,318,317,239



Firmware: dir815_v1.01b03_ab1k.bin
Date: 2010/11/01

9. Fix wlan 5g led error.
10. Add smart 404 function.
11. Fix web bug no.1,6,7 from US DLink.( “DIR-815 A1 1.00 A7EE” file).
12. Add radius server default port.
13. Fix hnap bug for DCC.
IPv6
14. Support IPv6 DNS and resolv.
15. Add 6rd-relay_prefix in 6rd command.
16. Set global ipv6 address to ppp interface.



Firmware: dir815_v1.01_a8pe.bin
Date: 2010/08/25

1. TCP mss adjust fail.(the fast net cause this issue)
2. Fix the ppp dial on demand function fail.(a8kf fix NO.8 side effect)

Reject issue:
1. The wireless IOT issue with Atheros chips [DWA-645] ? is normal in RD side test.



Firmware: dir815_v1.01_a8kf.bin
Date: 2010/08/20

Note: Change version from 1.00 to 1.01

2. Fix the bt 100M test.(enable Fastnat)
3. manual dns entry doesn't work.
4. cannot remove ip of lan when changing mode from 6rd to others.
5. press wps, disable wifi, wps light still blinks. after win7 (upnp), wps light doesn't blink.
6. Redirect the blocket website to blacked information page.
7. Fix the UI that can not be selected tkip when n only mode.
8. Fix sometime the forward is error when ip up.(lan PC continue ping ,change the wan ip ,sometime the ping response will fail.)
9. Clone PC's MAC address in DHCP mode failed at Internet Wizard.
10. add Firmware External Revision : V1.01bxx in hidden page



Firmware: dir815_v1.00_a86b.bin
Date: 2010/08/06

Fix:
1. Fix 6rd and 6to4 tunnel can not works because leak firewall accept rule.
2. Fix the default time zone as +8:00 taipei



Firmware: dir815_v1.00_a83m.bin
Date: 2010/08/03

Fix:
3. LAN page can’t save setting.
4. Wlan page can’t disable 2.4G & 5G mode.
5. 2.4G N-only WPA2-PSK-AES Chaiort Test RXtoLAN will Disconnect(No299).
6. Hidden page bug about language package.
7. Helpful hints have some error word from lab.

I won't be able to do a full test, on my router till the weekend. Thinking of upgrading the DIR-685 firmware to the latest 2.02WW, and do what I normally do with all firmware ....restart and input my data from scratch. I doubt it's the amount of DHCP reservation .......my friend has 10 reservation on his DIR-815. Will let you know how it goes with the new firmware. Can't wait 6 hours for each devices added on the DHCP. Will just add less than 5 reservation, and see if it appears.

DIR-815:
This issue doesn't effect all his wireless devices, there are 4 devices that are immune to this issue.

DIR-685:
LAN connected desktop is 90% fine, but LAN connect 360 and HP Printer needs static. All wireless devices has obtaining I.P issues, but then sometimes it may work. My brother had alerted me that his mobile device connection is working, but yesterday at 6pm it did not.

[FurryNutz]

If your seeing this on the 815 as well, might need to see if something on the line maybe causing it.

I would also contact D-Link support, level 2 maybe and see if they can take a look at this. I would also see if this problem follows by taking the 815 to a different location, say a friend or nieghbors and let them run it for say a few days and see if the problem crops up. If so then you'll know there is an issue with the router. If, not then maybe something with in your system.

Im debating on buying a 685 from fleabay or not to see if this issue is across this product line.

[ph0enix]

Hmm not sure what you mean about moving it on a different line, as in a different ISP service? Well that's alot of downtime and hassle with my friends, but currently the DIR-685 and the DIR-815 is atleast 13 miles away from each other. I'm 100% sure it's not our systems, cause the issues happens with the Xbox 360 console, and mobile phones. It seems that you have a similar internet set-up, if you do get one you can test it out as well  . Though what's level 2 D-Link support?

[FurryNutz]

Yes, if you have a spare to help you out that is while the 685 is located differently.

I presume this could be a FW issue. Just trying to see if the problem follows if you take the router to a different location.

Ya, I'm thinking about getting one, not sure if I wanna keep it full time.

Level 2 should be more experienced support people. They should be able to delve farther in to problems with out the usually, lets factory reset and configure from there. We know thats already done.

I think unfortuneately, getting any more FW help is going to be limited or none since this unit has gone EOL.

It would be good if you can to get a different model router and see. Another DIR series? Get one from a place that has a return policy.

[ph0enix]

Will update the router on the latest firmware, and see what will happens.... . Not sure having a different router would make any different, seems like a firmware glitch/bug. Good luck on finding a decent DIR-685 on eBay, there is a brand new one from Belgium that's going cheap.

[FurryNutz]

Ya I see a few on there. Need to get one thats an NA region. I would try a different router as a test though.

Keep us posted. 

[FurryNutz]

ok Just ordered one off Amazon for $73 including shipping. Supposed to arrive Friday.

I guess we'll see...

What is the internal drive connection? IDE or SATA?

[ph0enix]

You got it for $73   Refurbished?

Connection is SATA 2, you may want to get a extender cable to avoid it getting it too loud.
http://forums.dlink.com/index.php?topic=39462.0

The fan kicks in more with the HDD enclosed due to the heat building up, but it's fine anyway if you don't just live with the noise.

[FurryNutz]

New.

Well will see, it will be in a office in the back of the house where I don't visit much so noise may not be a factor. I'll plug in a 250Gb or 320Gb Laptop HDD and see how it works.

There a picture of what the router looks like with the extension connected?