D-Link Forums
The Graveyard - Products No Longer Supported => Routers / COVR => DIR-655 => Topic started by: ethirty on January 08, 2009, 07:45:57 PM
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Hi there,
I have searched the web to find the answer to this question and all I have come up with no real cause or solution.
The setup:
Time Warner Cable Internet Dynamic IP
DIR-655 A3 Firmware 1.21
3 hard wired, fully updated, virus free, windows xp pro machines
The Issue:
When only one PC is running or actively being used there is no issue. However, when there is moderate internet usage on a second pc the internet connection will drop (the WAN light on the router stays on as does the ethernet light on the modem) and give this pair of log entries.
[INFO] Thu Jan 08 21:27:37 2009 WAN interface cable has been connected
[INFO] Thu Jan 08 21:27:35 2009 WAN interface cable has been disconnected
This message can be forced by running any internet based game on the first by and then opening playing a movie on netflix. It will happen every time there is significant internet traffic on multiple pcs.
What I have tried:
Replaced with old netgear router no problems with the connection dropping connection.
Turned off all non essential options in the 655 (i.e. QoS, UPnP, Multicasting, traffic shaping, etc)
Reverted to old firmware versions to test.
Any insight? Thanks in advance.
EDIT
The Cause?: Incompatibility between DIR-655 and the Motorola SB-4100 cable modem (or perhaps bad modem, but I could not replicate the issue with an old router).
The Solution: Replace with newer modem. I would suggest any DOCSIS 2.0 modem, I specifically used the Linksys CM100, but the D-Link DCM-202 seems like a good option as well.
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On the Advanced - Advanced Network screen -- look for the "WAN Port Speed" setting -- set this to 100 Mbps.
Then -
Unplug power to the cable modem
Unplug power to the DIR-655
Restore power to the cable modem, wait 60 seconds for the modem to complete its link to the cable network
Restore power to the DIR-655
Now test it. If this keeps the problem from happening, then the problem was that the unit did not automatically negotiate a good link with your modem. Creating the manual setting resolved the issue.
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I switched it to 100Mbps and as soon as I put internet load on it it crashed with the same error. I tried switching it down to 10Mbps and it was stable through all my tests, but capped my download speed (as expected). I then switched it to manual 1000Mbps and it has been stable so far. I will post again to update in a few days. Thanks!
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Just curious:
- are the ethernet cables CAT 5(E) or less?
- Are the cables and RJ45 plugs DIY or prefab?
The cause for this can also be in your PC's NIC/drivers. What's the make of your NIC's?
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I switched it to 100Mbps and as soon as I put internet load on it it crashed with the same error. I tried switching it down to 10Mbps and it was stable through all my tests, but capped my download speed (as expected). I then switched it to manual 1000Mbps and it has been stable so far. I will post again to update in a few days. Thanks!
Hi ethirty,
You haven't mentioned the Brand and Model Number of the Cable Modem. The D-Link DIR-655 Router comes with an Ethernet Cable. I used that Ethernet Cable when installing that Router, instead of the existing Ethernet Cable running between the Cable Modem and the Router. Have you replaced that Ethernet Cable with the Ethernet Cable packed with the Router?
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Thanks for all the responses folks. So far so good. With the WAN port set manually to 1000Mbps the internet has been up and stable for 14hrs+ I will update again if there is any further problem.
Just curious:
- are the ethernet cables CAT 5(E) or less?
- Are the cables and RJ45 plugs DIY or prefab?
The cause for this can also be in your PC's NIC/drivers. What's the make of your NIC's?
I am using the ethernet cable supplied with the router for the modem-router connection. I have tried other cat 5e and cat 6 cables. I have numerous cables at my disposal both DIY and prefabs. I have tried a couple different cables and run all of them through the cable tester, and it seems to make no difference. Additionally, the ethernet light on the modem never goes out, nor does the wan light on the router.
The NICs vary, I have tried both the built in Nvidia Nforce Gbit port as well as a realtek Gbit card. The connection between the pcs and the router stays stable even when the "WAN cable is disconnected".
Hi ethirty,
You haven't mentioned the Brand and Model Number of the Cable Modem. The D-Link DIR-655 Router comes with an Ethernet Cable. I used that Ethernet Cable when installing that Router, instead of the existing Ethernet Cable running between the Cable Modem and the Router. Have you replaced that Ethernet Cable with the Ethernet Cable packed with the Router?
The modem is a Motorola Surfboard SB-4200 and I am using the cable packaged with the router, but have tried other cables.
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Auto selection of connection indeed causes these errrors a lot (either on the NIC side or the modem side). Think you solved it
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Well, the problem persists. Regardless of what setting I have the WAN port speed set at, it will still give me the WAN cable disconnected error. Any further ideas? I have checked the various cables and all test fine, including the one that came with the router. My next thought is to try a different modem, but it is curious that this modem works fine with one of my old routers.
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At the IP address, 192.168.100.1, the SB-4200 probably has some logs. Can you copy and past the text of the logs here?
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There appears to be a problem with connecting with that modem at 100 Mbps. The auto doesn't work cause the 100 doesn't work. It tries 1000, gets denied then moves to 100 and it connects, but then the 100 causes this dropping.
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Here is the modem log for the most recent loss
090112182153 5-Warning B605.10 Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID (EC=8)
090112182153 4-Error B556.0 Received SA-Map Reject(4-B) error code 8
090112182153 7-Information B601.0 SA Map State Machine Started
090112182112 8-Debug F502.1 Bridge Forwarding Enabled.
090112182112 8-Debug M570.2 Motorola CM certificate present
090112182112 8-Debug M571.7 CM Cert Upgrade Enabled. AutoRun after Reg or via SNMP
090112182112 8-Debug I503.0 Cable Modem is OPERATIONAL
090112182112 7-Information B401.0 Authorized
090112182111 8-Debug F502.3 Bridge Learning Enabled.
090112182111 8-Debug B961.2 Retrieved CA Cert from Secure DL sector successfully
090112182111 7-Information B0.0 Baseline Privacy
090112182110 7-Information X518.9 Configuration - MMDMMD - Unit Update Enabled by CVC
090112182110 8-Debug I500.3 DOCSIS 1.1 Registration Completed
090112182110 7-Information I500.5 Attempting DOCSIS 1.1 Registration
090112182110 7-Information D509.0 Retrieved TFTP Config File SUCCESS
090112182110 7-Information D507.0 Retrieved Time....... SUCCESS
************ 7-Information D511.0 Retrieved DHCP .......... SUCCESS
************ 5-Warning D520.2 DHCP Attempt# 1 BkOff: 5s Tot DSC:1 OFF:1 REQ:1 ACK:1
************ 7-Information D0.0 DHCP CM Net Configuration download and Time of Day
************ 7-Information T500.0 Acquired Upstream .......... SUCCESS
************ 8-Debug T503.1 Acquire US with status OK, powerLevel 51, tempSid 2326
************ 8-Debug T505.0 Acquired Upstream with status OK
************ 7-Information T501.0 Acquired Downstream (711000000 Hz)........ SUCCESS
************ 8-Debug T509.0 Acquired DS with status OK, DS Freq 711000000, US Id 3
************ 7-Information I510.0 *** BOOTING *** SB4200-1.4.9.2-SCM01-NOSH
And here is the router log
[INFO] Mon Jan 12 17:21:01 2009 Bringing up WAN using DHCP
[INFO] Mon Jan 12 17:21:01 2009 WAN interface cable has been connected
[INFO] Mon Jan 12 17:21:00 2009 WAN interface cable has been disconnected
The modem is 1hr off as you can tell by the time. If this is any help great, if not I can call timewarner and request a new modem.
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Good catch!
If you didn't initiate that modem reboot manually, then try swapping the modem. Even if the LAN side was flaky, it shouldn't have rebooted like that.
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Ask for the RCA RCM-425. Best modem Time warner offers.
They wanted to give me the newer Motorola, I hooked it up and immediately had problems.
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Just got off the phone with Timewarner and they said the modem seemed fine (right...) and blamed it on the router as I cannot get it to reset on command without the router in place, so I will grab one of the linksys CM100 modems from the office and give it a try. If it works any reason not to keep the CM100 permanently?
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You will have to tell TW that you are switching modems as they give out IP's by the MAC address of the modem.
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Ok, just an update. I plugged in the linksys cm100 and called TW with the MAC address. So far so good. It used to be a sure bet that it would disconnect shortly after loading netflix on demand, but I have netflix running on two pcs currently as well as constant bandwidth tests running on the third.
I suspect it was some incompatibility between the Motorola SB-4100 and the DIR-655, as I could not replicate the issue with an old netgear router and the same modem.
If the problem comes back I will post again, but I think we are out of the woods.
Thanks for all the help folks.
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I had this exact problem with Time Warner Cable, a Motorola SB5101 modem, and the DLink DIR_655.
TWC came out and checked the cable signal and said everything was fine (as they always do). However, the problem continued to occur. So I contacted Motorola Tech Support and they had me access the SB5101 admin page (just enter the modem's IP address in your browser's URL box). Then click on the Signal button. The web page will display the downstream signal strength. In my case, it was -11 dbmV. While within spec for the SB5101 (-15 dbmV to +15 dbmV), Motorola Tech Support said they much prefer to see the number closer to zero.
The tech support guy asked if there were any splitters between the incoming line and the modem. In my case there was one to split the incoming signal between internet and TV distribution. He suggested I remove that and see if the problem went away. So as an experiment, I bypassed the splitter and re-measured the signal strength via the SB5101 admin page. The signal strength was now at -6 dbmV which means the signal was over 3 X stronger. With that change I had no more dropped connections. However, I also had no cable TV since I had eliminated the splitter.
So I purchased a cable booster with support for an internet connection (you have to be able to communicate upstream). Once installed, the signal strength to the SB5101 measured +6 dbmV, which means the signal is now 6 X stronger than when I started. And as an added better, I have a crisper picture on my TV's.
So it isn't necessary to buy another cable modem, just boost the signal strength to the one you have, and the dropped connectivity problem should go away.
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Also recommend to remove any and all TV line splitters if possible or use just one and make it a good quality one.
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Now i have same problem :/, WAN interface cable has been disconnected then WAN interface cable has been Conntected ( 2 sec delay)
i got same router but i do got a Zyxel prestige 660h tripleplay, i have been using these 2 for a long time but 1 week ago it started to struggle, i restarted the units and then the WAN did keep its uptime abit longer ( 12-24 hours), then it returns to 2-10 min WAN drops -_-.
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Try setting the WAN Connection Interface speed.
Try swapping out for a know good cable, recommend CAT6. Shortest length possible. I use a 1footer.
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have tried that, didnt help and i am using a CAT 5e cable between the modem and the router
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The router is probably reporting and functioning as designed when this happens. I would remove the router and connect one PC to the ISP modem and view the network status for the PC while connected to the ISP modem and see if it reports the same thing. I'm wondering if the ISP modem is losing connection or something on the ISP modem is intermittently stopping the connection.
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i will try that soon when i get the chance, also i did send a email to Telia (my internet provider) about this too
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Might try a different ISP modem too. ;)
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well i dont got another Modem to test with, but i guess if i try without the router and the problem still persist then replace the Modem would be the next option.
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Let us know how it goes.
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Hey Furry, I think this is the problem I am getting on my router. Every time my router reboots as I was telling you, I get this exact message in my logs.
[INFO] Sun Jul 03 02:22:37 2011 Above message repeated 1 times
[INFO] Sun Jul 03 02:22:34 2011 Estimating speed of WAN interface
[INFO] Sun Jul 03 02:22:33 2011 Obtained IP Address using DHCP. IP address is 173.210.144.145
[INFO] Sun Jul 03 02:22:25 2011 Bringing up WAN using DHCP
[INFO] Sun Jul 03 02:22:25 2011 WAN interface cable has been connected
[INFO] Sun Jul 03 02:22:24 2011 WAN interface cable has been disconnected
[INFO] Sun Jul 03 02:22:19 2011 Bringing up WAN using DHCP
[INFO] Sun Jul 03 02:22:19 2011 WAN interface cable has been connected
[INFO] Sun Jul 03 02:22:17 2011 WAN interface cable has been disconnected
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This could be the result of the ISP SAT modem loosing connection and the router is reporting it as such, thus seemingly making it look like it's the routers problem.
Can you check any logs or status of the ISP modem and see if there has been any connection issues during this time frame?
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ok, i am directly conntected to the modem (zyxel prestige 660H), no problem so far but, i have to stay connected for a while, cant access the logs on modem :/ there is none when i check
EDIT: kk 3 hours now connected to the modem, stable most of the time except some timeouts with a 10-20 min interval. i am using cmd to ping all time.
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What are these time outs? ???
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i dont know.... they could be related to the issue but i did not lose the WAN directly while connected to the modem, just smaller lag (Timeout) maybe the router lose connection due to this? got no answer ;/
edit: timeout = "device that has waited a certain length of time for some input but has not received it"
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Something sounds like the ISP modem isn't maintaining a connection with the router or just intermittently disconnects and the router detects this and then has to wait for the period of time for it to reconnect. Routers can usually connect fairly fast if it's looking for DHCP. Since your noticing that it's taking 2-10 minutes during these disconnects, makes me think that the router just can't get a connection to the modem sooner as the modem isn't providing the connection during this time frame. Any chance you have friends or nieghbors with internet that you can take this router too and see if this problem follows? Only other recommendation would be to try a different router and see if the problem happens there as well.
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srry if i was unclear, the lag/timeout itself is not long, the interval between them is short, that was bother me most (1-20 min)actually when the timeout occur it it takes like 1-3 sec and with the WAN dropping, "WAN interface cable has been disconnected" to "WAN interface cable has been connected" is like 2-3 seconds delay. so the router gets the WAN connection back after like 1-2 sec, so its not slow
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Ok, ...still that your seeing these disconnections on the WAN for a period of time. Should not be there at all. It's possible that these time outs are causing these. Can't be sure. :-\ If you have swapped LAN cables and tested with and with out WiFi on the router being on and it's still doing it then I presume something between the router and the modem is the cause.