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Author Topic: Serious 5GHz Performance Problem  (Read 3715 times)

dja13

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Serious 5GHz Performance Problem
« on: January 03, 2014, 02:39:35 PM »

Hello folks,

Glad I found this forum because the Asia Pacific support pages are like a maze to navigate...

Straight out of the box my DIR-826L worked in a somewhat acceptable manner. I connected my Win7 laptop and Synology Diskstation via WLAN at 2.4GHz and via LAN at 1.0 Gbps (full duplex) using a Cat5e cable. For the latter I achieved file transfer speeds of 425 Mbps using SMB. About half of what I had hoped for... but the 2.4GHz radio and LAN was not the reason for my purchase (and I was using Cat5e and SMB).

Yes, I bought the DIR-826L because it advertised a nice, reasonably fast, 5GHz radio connection at an excellent price... and it seems the excellent price was just too good to be true. Here follows a list of the issues I observed with 5GHz connectivity out of the box:

- Network SSID was not broadcast for many minutes after start-up
- Initial connection attempts with client devices (Intel Wifi 5300 AGN chipset, iPad Mini) would fail
- Subsequent connection attempts would successfully connect at 300 Mbps, however...
- Connections to LAN connected devices would time-out or simply not work
- Could not reliably use the internet gateway via the WAN connection
- Connections to the router on 192.168.0.1 would time-out or fail or even present an SMC networks webpage!?! (sometimes this would vanish and be replaced by a partially loaded DLink page)
- Network SSID would vanish for minutes at a time at apparently random intervals

So much for the DIR-826L!

In any case after some trial and error I did get manage to achieve a stable 5 GHz connection. My theory was that the release firmware was crap and that the DIR-826L didn't have enough processing power to sustain all the network interfaces. The following worked for me:
- Disable the 2.4GHz radio (say goodbye to any backwards compatibility with any 802.11 b/g devices)
- Disabling encryption (try WEP or open)
- Upgrading the firmware to 1.02

Right now now I've turned encryption back on and the Wifi is still ticking along, but then I decided to plug in my ethernet cable and I see the LAN is crippled to 10 Mbps. WTF?

Please let me know if you know of any solutions or this baby will be boomeranging back to D-Link.

Cheers,
DJA


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FurryNutz

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Re: Serious 5GHz Performance Problem
« Reply #1 on: January 03, 2014, 03:22:33 PM »

Link>Welcome!

  • What region are you located?
  • Was a Factory Reset performed before and after any firmware updates then set up from scratch?


Please follow this for doing any FW updates:
FW Update Process

Please review this and see if any of this helps for both this post and your LAN negotiation post:
Router Troubleshooting Suggestions and Tips

Please post with feed back with the questions presented and try some of the suggestions. The more we know the better we can help you out with better feedback.
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Cable: 1Gb/50Mb>NetGear CAX80>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.

dja13

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Re: Serious 5GHz Performance Problem
« Reply #2 on: January 03, 2014, 04:42:46 PM »

Thanks FurryNutz(!)

- I am in AU and my new au firmware came from https://au.mydlink.com/support
- Yes a factory reset was performed before firmware update (several times). No to after. The HTML pages in the router did not prompt me to do that :-)
- Otherwise I am pleased to say I intuitively followed all the correct FW upgrade procedures, other than not reading all the stickies. Sorry! :-/

I have since re-enabled the 2.4GHz Wifi and things are still ticking along. My conclusion: Release firmware on my device was bad?

Will look into LAN negotiation issues and router settings later if I have problems streaming media. If it breaks again, I'll try that final factory reset as per the sticky.. but right now everything is connected an performing about 3x faster than my original 54g network. Not bad for $35 through iiBuy! Though I could have done without the hours of frustration :-p



 
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FurryNutz

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Re: Serious 5GHz Performance Problem
« Reply #3 on: January 03, 2014, 04:59:14 PM »

Please perform a factory reset before and after updating FW.
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Cable: 1Gb/50Mb>NetGear CAX80>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.

FurryNutz

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Re: Serious 5GHz Performance Problem
« Reply #4 on: April 01, 2014, 01:11:43 PM »

Any status on this?  ???
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Cable: 1Gb/50Mb>NetGear CAX80>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.