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[xli]

question re:  DIR-655; Hardware ver A4; Firmware version 1.32NA

during bandwidth tests to several sites (principally speedtest.net) I get ping times of 10-11 ms, download speeds of 12+ to 17+ mbps but failure on upload tests using my DIR-655.

when I bypass the 655 and test directly with my cable modem, all (including upload) tests work reliably and consistantly.

I have swapped the two ethernet cables involved as well as replacing both with new cables but the results are the same (uploads fail with 655 and work without it)

I have seen several postings over the the last year with this same problem but have never seen any comment from D-Link, or a solution from any reader.

Not that it should have any bearing, but I have TA785GE-128M motherboard and am running Windows 7 (patch current) on COMCAST

is this problem acknowledged by D-Link and is there a solution?

[FurryNutz]

Turn off QoS and any traffic shaping options in router.
Ensure Primary and 2ndary DNS addresses are being filled in.
Turn off Advanced DNS Service.
Turn ON DNS relay.

What browser are you using? Happen with different browsers?

[xli]

QoS unchecked in Windows; Packet Shaping unchecked in router; Qos gray in router; primary and secondary dns populated (different addresses); advanced DNS disabled in router;

newest (within 1 week) versions of Firefox, Chrome and Explorer - all produce the same result;

so far only change made is QoS / shaping

no change in results...

have not yet located DNS relay setting

[xli]

Enable DNS Relay: is (and was) checked in the router

All suggestions verified or changed to your recommendations FurryNutz (thanks for your suggestions)- but still have failure on all three (current) major browsers.

[FurryNutz]

Are there any Anti Virus or 3rd party firewall programs installed on 7?
How are you connecting to the router? I presume wired?

[xli]

as indicated in the comments re swapping and replacing the ethernet cables - I am wired.

I am using KIS 2011 during the failed PC <-> DIR 655 <-> Cable Router tests and during the successful
PC <-> Cable Router

[FurryNutz]

Any chance you can take this router to a neighbors or friends house and see if the issue is tracking?

[xli]

Since I did not have this problem with my previous Netgear wireless router (sold when I decided to "upgrade" to gigabit and 802.11N) I think I'll just go pickup a new Netgear box and test it.  If no problem, sell/ditch the D-Link - if problem remains rtn the Netgear and swap cable router (free) - if problem still remains focus on PC settings.

May be time to fire up WireShark and work on my tcp/udp/ip/icmp skills.

Thanks for your help

[FurryNutz]

Kewl, let us know what you find out. Be interested in wireshark results. 

[xli]

Interesting twist - after last nights post, I tested again and the upload test worked fine.  Ran a total of 11 tests to different parts of the country and got 11 successes.

This morning 5 tests - five failures.  no router or modem resets or PC reboots between this mornings failed tests, yesterdays successes and Wednesdays failures. - only difference in yesterdays successes and todays failures is time-of-day, 6.5 hours (position in the universe etc)

May look up a a command line bandwidth tool and schedule some TOD testing and log results.

[FurryNutz]

Nice find. Seems like you are seeing success. I'm thinkin ISP related here? 

[xli]

I'm leaning to the intermittence being attributable to whatever can make (and is likely making) dynamic changes - both ISP and Win 7 TCP stack are candidates...

Since Win7 performs well (99-100%) when connected directly to the cable modem, the overall problem is likely that dynamic changes made by either ISP or Win7 is in conflict with the current DIR-655 settings.  It is possible that once identified, the problem can be resolved by configuration changes to either PC or router ( any favorable changes to (from) Comcast are unlikely ).

Another thing - in (less rigorously) researching this problem in the past several months, I do not recall any XP or Linux users with this problem - only Win 7 users.

I ran across the below informative link this morning which discusses several of the Win 7 parameters.

http://www.speedguide.net/articles/windows-7-vista-2008-tweaks-2574

[FurryNutz]

Good info. Keep us posted on how it goes and if you find anything.

[trektek]

I too am having consistent failures with the upload speed test. I am running WinXP SP3 but I have a Rev B 655 with 2.00NA firmware. Like you I can bypass the router and pass the test with flying colors. So, I would have to say it's a setting within the router. Hopefully someone on this forum knows what that setting is and will let us know or help us figure it out.

[FurryNutz]

How is your router set up Trek?
What is your ISP service?
What is your ISP modem? Cable or DSL?
How are you connecting to the router? Wired or Wireless?
What wireless modes are you using?
Are you using QoS?
Are you using Advanced DNS Service?
Are you using DNS relay?