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[leowood]

Hi ALL, I am new here from China, I am very frustrate with my A4  DIR-655

Here is my story:

The reason I buy this model is QOS, I just read a lot of DIR-655 streamengine article, it's hardware-base QOS router, can operate under heavy p2p application, it's why I am here.

The wireless Client is ACER AS1810TZ laptop, the wireless card is Intel wifi link 1000, I have already disable power saving option. AS1810TZ worked fine with my old 802.11G router linksys WRT54GS and Buffalo WRH-HP-54G.

The dir 655 seems fine when I just surfing web and download some files with IE,  but when I check the statistics, I see a lot of wireless error and tx packet/ rx packet dropped, the percent I calculate is about 0.5%, I am wondering if it's normal phenomenal?

When I download several bit torrent files With XUNLEI simultaneously, total 6 files, after 3 minutes, lot of session be created, the router slow down the download and finally crashed, wan be reset and wireless connection lost. router can recover after 1 minutes and try to continue the BT download again, but failed again.

I just try all firmware version like 1.21EA, 1.30EA B04, 1.30EA b05 and 1.33NA, but all does not work for me, I haven't try disable WISH, QOS, DNS relay, PNP,because  I believe these function should be work properly under heavy load.

anyone has comment on this? here I attached the log for reference


[INFO] Wed Feb 17 17:57:54 2010 WAN interface speed measurement completed.  Upstream speed is 463 kbps
[INFO] Wed Feb 17 17:56:18 2010 Estimating speed of WAN interface
[INFO] Wed Feb 17 17:56:18 2010 PPP network up with IP Address 125.107.2.123
[INFO] Wed Feb 17 17:56:18 2010 LCP sets local options: ACCM: 00000000, ACFC: 1, PFC: 0, MRU: 1492
[INFO] Wed Feb 17 17:56:18 2010 LCP sets remote auth: C023
[INFO] Wed Feb 17 17:56:18 2010 LCP sets remote options: ACCM: FFFFFFFF, ACFC: 1, PFC: 0, MRU: 1492
[INFO] Wed Feb 17 17:56:18 2010 Established INTERNET PPPoE connection, session id 5693
[INFO] Wed Feb 17 17:56:18 2010 Issuing request for offer for INTERNET PPPoE Session
[INFO] Wed Feb 17 17:56:18 2010 Offer of service [any] accepted for INTERNET PPPoE Session
[INFO] Wed Feb 17 17:56:18 2010 Discovering PPPoE servers for INTERNET PPPoE Session
[INFO] Wed Feb 17 17:56:18 2010 Trying to establish INTERNET PPPoE connection
[INFO] Wed Feb 17 17:56:17 2010 Log viewed by IP address 192.168.0.126
[INFO] Wed Feb 17 17:55:57 2010 UPnP deleted entry 255.255.255.255 <-> 0.0.0.0:57280 UDP
[INFO] Wed Feb 17 17:55:48 2010 Terminating INTERNET PPPoE session ID 5760
[INFO] Wed Feb 17 17:55:48 2010 PPP network down
[INFO] Wed Feb 17 17:55:48 2010 LCP sets remote auth: 00000000
[INFO] Wed Feb 17 17:55:48 2010 LCP sets remote options: ACCM: FFFFFFFF, ACFC: 1, PFC: 0, MRU: 1492
[INFO] Wed Feb 17 17:55:48 2010 LCP sets local options: ACCM: 00000000, ACFC: 1, PFC: 0, MRU: 1492
[INFO] Wed Feb 17 17:55:48 2010 PPP network down
[INFO] Wed Feb 17 17:55:06 2010 UPnP renew entry 255.255.255.255 <-> 125.107.9.207:57280 <-> 192.168.0.197:57280 UDP timeout:0 'Teredo'
[INFO] Wed Feb 17 17:53:19 2010 Above message repeated 5 times
[INFO] Wed Feb 17 17:53:14 2010 Allowed configuration authentication by IP address 192.168.0.126
[INFO] Wed Feb 17 17:52:48 2010 UPnP renew entry 255.255.255.255 <-> 125.107.9.207:57280 <-> 192.168.0.197:57280 UDP timeout:0 'Teredo'
[INFO] Wed Feb 17 17:43:05 2010 Above message repeated 16 times
[INFO] Wed Feb 17 17:43:04 2010 UPnP added entry 255.255.255.255 <-> 125.107.9.207:18159 <-> 192.168.0.197:15000 UDP timeout:0 'Thunder5'
[INFO] Wed Feb 17 17:43:04 2010 UPnP added entry 255.255.255.255 <-> 125.107.9.207:18159 <-> 192.168.0.197:80 TCP timeout:0 'Thunder5'
[INFO] Wed Feb 17 17:43:01 2010 UPnP deleted entry 255.255.255.255 <-> 125.107.9.207:18159 UDP
[INFO] Wed Feb 17 17:43:01 2010 UPnP deleted entry 255.255.255.255 <-> 125.107.9.207:18159 TCP
[INFO] Wed Feb 17 17:42:20 2010 UPnP renew entry 255.255.255.255 <-> 125.107.9.207:57280 <-> 192.168.0.197:57280 UDP timeout:0 'Teredo'
[INFO] Wed Feb 17 17:38:15 2010 Above message repeated 14 times
[INFO] Wed Feb 17 17:37:46 2010 UPnP added entry 255.255.255.255 <-> 125.107.9.207:18159 <-> 192.168.0.197:15000 UDP timeout:0 'Thunder5'
[INFO] Wed Feb 17 17:37:46 2010 UPnP added entry 255.255.255.255 <-> 125.107.9.207:18159 <-> 192.168.0.197:80 TCP timeout:0 'Thunder5'
[INFO] Wed Feb 17 17:37:33 2010 UPnP renew entry 255.255.255.255 <-> 125.107.9.207:57280 <-> 192.168.0.197:57280 UDP timeout:0 'Teredo'
[INFO] Wed Feb 17 17:34:57 2010 Above message repeated 5 times
[INFO] Wed Feb 17 17:34:47 2010 UPnP added entry 255.255.255.255 <-> 125.107.9.207:57280 <-> 192.168.0.197:57280 UDP timeout:0 'Teredo'

[EddieZ]

There's two issues here.
The major one:
1. You need to throttle down on your 'max BT peer" connections. The DIR is good, but it is not a miracle machine that will  stay up whatever you throw at it. The DIR will work OK with about 250/300 max connections (up and down combined)
Minor one:
2. Your connection with your modem seems to be flakey, so check the cables. At least, that's what the log suggests.

[MacAl]

There's two issues here.
The major one:
1. You need to throttle down on your 'max BT peer" connections. The DIR is good, but it is not a miracle machine that will  stay up whatever you throw at it. The DIR will work OK with about 250/300 max connections (up and down combined)
Minor one:
2. Your connection with your modem seems to be flakey, so check the cables. At least, that's what the log suggests.

100 connections on uTorrent is the max I was able to get out of it. That still requires a reboot of the router after the torrent files are done downloading because all other internet access gets locked out for everyone EXCEPT the machine downloading the torrent.

[EddieZ]

100 connections on uTorrent is the max I was able to get out of it. That still requires a reboot of the router after the torrent files are done downloading because all other internet access gets locked out for everyone EXCEPT the machine downloading the torrent.

Recheck your settings, esp. the settings that concern the number of connections. They are set in different places usually in the client software.

[leowood]

There's two issues here.
The major one:
1. You need to throttle down on your 'max BT peer" connections. The DIR is good, but it is not a miracle machine that will  stay up whatever you throw at it. The DIR will work OK with about 250/300 max connections (up and down combined)
Minor one:
2. Your connection with your modem seems to be flakey, so check the cables. At least, that's what the log suggests.

thanks EddieZ
- yes， I know throttle down the connections can be some help to improve the download stability, my adsl is 4M/512K, normally I can get 400K download speed, but for torrent download, I have to limit the download/up speed to 350K/20K in XUNLEI setting,  I think limit the speed should also limit the peer connections.

Today I try down 3 files with XUNLEI, a bittorrent client. After 1 minute passed, lot of session be established, I ping the router IP 192.168.0.1, found the router is not stable, the ping reach 100 ms or high even get lost, normally ping router should less than 1ms from wired computer, when ping router > 30ms, the download speed became unstable, and hard to access the router web interface, I immediately check the internet sessions amount in router statistic menu, calculate total 2320 session record here, I remember my old WRT54GS  can handling more than 4000 sessions with no problem



Then I disable the dynamic fragmentation option in QOS setting menu, I find the router became solid under heavy torrent downloading, the ping to router is stable, less than 1ms, so I think the QOS engine can’t handling the mass connections, ubicom streamengine slow down the whole rounter.



Another my thought is DIR 655 QOS is absolutely useless,
-   I set A computer priority 40, and set B computer priority 200, when I download file in B computer with single thread, A computer ping to ISP gateway is 150ms( normally the ping is around 30ms),
-   if I download the files with 5 thread in B computer, then I got the ping 800ms or more to ISP gateway (normally the ping is around 30ms),
-   I can’t see any improvement with  QOS enable, what's wrong with my dir 655?

[EddieZ]

I think limit the speed should also limit the peer connections.

No, you really need to seed the number of incoming connections

Then I disable the dynamic fragmentation option in QOS setting menu, I find the router became solid under heavy torrent downloading, the ping to router is stable, less than 1ms, so I think the QOS engine can’t handling the mass connections, ubicom streamengine slow down the whole rounter.

It is taking up prcessor/memory a lot with large numbers of connections. So the performance degredation is quite obvious...

-   I can’t see any improvement with  QOS enable, what's wrong with my dir 655?

You cannot prioritize IP's only, you need to at least differentiate in the ports that are used. otherwise it won't work... So you can prioritize certain kinds (streams) of data, not all equal http or FTP with respect to different IP's

[leowood]

I finally found the root cause, UBICOM QOS can't handling so many session/connection raised by P2P client,  it lead to router freezing frequently (just like cpu utilization 100%) , once QOS overload ,then the wired computer download speed slow down, and wireless client disconnect from router/ router wan port rest.

simply ping router lan address can verify this phenomenal.

So simply turn off the QOS can solve the problem (low P2P speed, wan reset, wireless disconnect)

QOS capability does not relate to any firmware version, frankly said its very poor, how stupid dlink set the QOS enable by default.

 

[leowood]

just return to dlink for replacement, dlink confirm the wireless signal is not stable, dropped packet when wireless client ping router, will send me a new one for test, so I will update the situation here to see if QOS issues is a common or individual once I received

[lotacus]

to make QoS function properly, I would think, like many other router firmware, you would have to set the max upload to about 80 to 90 percent of what you get from your ISP. The reason for this is so the router can buffer the acks and delay them according to the service priority. Though I do agree, the QoS fucntion is flakey in my opinion and a lot of users mis-interpret what QoS is and how it is supposed to function. Perhaps what you may find more helpful is a gateway that impliments traffic shaping instead.

[leowood]

Good news, today received replaced 655 from Dlink office， seems everything is OK,
Just download 4 torrent files meantime in office (100M connection), total 3300 sessions,  250 ESD connections, around 5M/s speed,QOS enabled, router is stable, no ping delay and packet lost under heavy download,

so the conclusion is QOS is applicable for heavy torrent handling no problem,
my old DIR 655 is a defective,
So sadly I waste 3 days on this,

[leowood]

Good news, today received replaced 655 from Dlink office， seems everything is OK,
Just download 4 torrent files meantime in office (100M connection), total 3300 sessions,  250 ESD connections, around 5M/s speed,QOS enabled, router is stable, no ping delay and packet lost under heavy download,

so the conclusion is QOS is applicable for heavy torrent handling no problem,
my old DIR 655 is a defective,
So sadly I waste 3 days on this,

OMG！！！！take my new DIR-655 to home, the problem produce again. running 4 torrent files, ping router lose packet and time out, the difference between office network and home network is  office net work is static wan IP, while the home network is ADSL PPPOE dial-up, so , the question is  DIR-655 PPPoE mode is not friendly with QOS?

[bigeyes0x0]

That might be the case, I have the same configuration as yours at home, and I have the same problem of ping lag and sometimes lost packets when I use wireless n in 40MHz mode whether when I do torrent or not. This non-sense happens with every firmwares I have tried from 1.30WW, to 1.31EU and 1.33NA, might be others, too I guess.

So have you tried running your wireless n in 20 Mhz mode? And which wireless client inside your laptop, Atheros, Ralink, Broadcom or Intel...?

EDIT: I do not have WAN or wireless drop off and restart as of now.
EDIT2: My wireless client is a DWA-140 (Ralink 2870) with latest Ralink Vista x64 driver. Wireless g with a Atheros chip on my netbook does not have this problem.

[EddieZ]

OMG！！！！take my new DIR-655 to home, the problem produce again. running 4 torrent files, ping router lose packet and time out, the difference between office network and home network is  office net work is static wan IP, while the home network is ADSL PPPOE dial-up, so , the question is  DIR-655 PPPoE mode is not friendly with QOS?

You might want to start thinking about your PPPoE modem as the cause of the issue....

[leowood]

You might want to start thinking about your PPPoE modem as the cause of the issue....

I own my PPPoE modem for 10 years (e-tek brand), this modem no problem connect to my ASUS, Linksys, Baffalo. So I do not thinks its modem issues.

[leowood]

That might be the case, I have the same configuration as yours at home, and I have the same problem of ping lag and sometimes lost packets when I use wireless n in 40MHz mode whether when I do torrent or not. This non-sense happens with every firmwares I have tried from 1.30WW, to 1.31EU and 1.33NA, might be others, too I guess.

So have you tried running your wireless n in 20 Mhz mode? And which wireless client inside your laptop, Atheros, Ralink, Broadcom or Intel...?

EDIT: I do not have WAN or wireless drop off and restart as of now.
EDIT2: My wireless client is a DWA-140 (Ralink 2870) with latest Ralink Vista x64 driver. Wireless g with a Atheros chip on my netbook does not have this problem.

I haven't try the 20Mhz mode, I won't give up the 40M mode for only 40Mhz can handling 300mbps link speed.
my wireless client is broadcom (my thinkpad X60), realtek( my desktop PC), and intel wifilink 1000 (my acer laptop), all client suffer the wireless lost while BT download.