D-Link Forums
The Graveyard - Products No Longer Supported => Routers / COVR => DIR-655 => Topic started by: GVG on June 22, 2009, 08:43:19 AM
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I have noticed that my router will freeze anytime my cable modem is issued a reboot command by my ISP. It can also occur if the cable modem lost and regained its signal.
The status page of the Router still says I have an IP and it appears to be normal in every way except it wont pass any data through the WAN port. The only way to recover is to also reboot the router. This is fine if I am home, but if I am away it kills my phone system (VOIP) and my alarm system.
Why would my modem rebooting make the router stop passing data through the wan port?
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Does the modem give out a new LAN IP? Or is it static?
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It is a DHCP assinged IP, but it never changes. As long as I always have the same MAC address I get the same IP for months or years at a time. The only way to get a new IP is to: ask for one, change my MAC address, or leave the modem off for a couple of weeks and wait for the DHCP pool to give it away.
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It is a DHCP assinged IP, but it never changes. As long as I always have the same MAC address I get the same IP for months or years at a time. The only way to get a new IP is to: ask for one, change my MAC address, or leave the modem off for a couple of weeks and wait for the DHCP pool to give it away.
OK, dumb question but I have to ask. Do you have your NIC's MAC address entered into the space provided in the WAN setup page? I'm pretty sure that you do, but, ya know, I'm from the camp that preaches "the only dumb question is the one not asked". Of course, as soon as everyone in the brainstorming meeting assures me of this, they collectively look at each other with a "what a stupid question" look on their face when I'm not looking. ???
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No i do not have it entered.
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No i do not have it entered.
Ok, go to that setup page and then read the help file. I think that what it says about the MAC address window might help you with your problem. I hope. :-\
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I guess you have your 655 setup as 'dynamic IP' in http://192.168.0.1/Basic/WAN.shtml ?
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I am not sure how entering a different MAC would be any different than using the routers default MAC. The router is what the cable modem sees, not the NIC of my computers. Also I have 11 computers and other devices on my network, so which NIC would I choose anyway?
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Yes I am in dynamic IP. My ISP does not use static IP. In fact I tried to enter the dynamic info from the status page as static info instead and it would not work. I got no data transfer across to the cable modem.
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I am not sure how entering a different MAC would be any different than using the routers default MAC. The router is what the cable modem sees, not the NIC of my computers. Also I have 11 computers and other devices on my network, so which NIC would I choose anyway?
Well, I was assuming that when you set up your service your ISP "trapped" the MAC address of the hard wired line that was used to make the initial connection. Especially if they provided your first NIC. Then they would already know what it is. My poorly made point was that perhaps your ISP goes looking for that MAC address each time they have to restart their connection. If you were going to add a MAC address, I would sit at the PC that made the initial connection and clone that computers (NIC's) address. Whether or not it makes one whit of difference....I couldn't say. You can put in any address you like but if they are looking for a specific address, then the choice is obvious. I guess I should have first asked you if this is their standard operating procedure.
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Yes I am in dynamic IP. My ISP does not use static IP. In fact I tried to enter the dynamic info from the status page as static info instead and it would not work. I got no data transfer across to the cable modem.
What kind of internet connection do you have? Cable, PPPoE, PPPoA? And is your modem bridge by any chance?
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As it says in the topic header, its a cable modem. :)
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As it says in the topic header, its a cable modem. :)
Sorry... :-X
This means you cannot setup anything in the router.... Try checking or unchecking (depending on the current status) the option "Use Unicasting : (compatibility for some DHCP Servers)" on the page: http://192.168.0.1/Basic/WAN.shtml
See if that helps.
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It happened again yesterday. Has anyone else ever seen this happen to them?
Just to summize:
Cable modem reboots, DIR-655 still shows getting a valid external IP from modem, all status indicators show online, but internet is not reachable. Reboot the router or do a release/renew IP on the router and everything goes back to normal.
If no one else sees this happening it must be something with my SB5120 modem.
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When this happens can you ping the following?
1) the routers IP
2) the routers gateway ip
3) 4.2.2.2
4) google.com
Let me know where that fails.
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I will try those tests when I get home this evening and post the results. I can tell you that I can access the routers setup pages and go to any page within them, but I cant reach external websites. As to can I ping the gateway or the DNS I will have to try that later.
thx
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When this happens can you ping the following?
1) the routers IP
2) the routers gateway ip
3) 4.2.2.2
4) google.com
Let me know where that fails.
Wouldn't it be helpful to also try to ping from the router?
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It can't hurt. But if the PC can ping the router then it shouldn't matter.
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OK I ran the tests after making the modem lose connection. I was not able to ping 4.2.2.2, my gateway IP or Google.
(http://forums.dlink.com/Users/elliot/Desktop/Picture 1.jpg)
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Hi,
I have my VoIP box in between my router and my cable modem. Inside the VoIP box settings I set up a DMZ for the 655-router's reserved IP as handed out by the VoIP box. Inside the 655-Router setup I set it as STATIC IP using the IP from the VoIP box.
In this manner, I "believe" I avoid a double-NAT issue that some places say is a performance killing thing; not that I have seen it kill any performance either way.
SD1
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Hi,
I have my VoIP box in between my router and my cable modem. Inside the VoIP box settings I set up a DMZ for the 655-router's reserved IP as handed out by the VoIP box. Inside the 655-Router setup I set it as STATIC IP using the IP from the VoIP box.
In this manner, I "believe" I avoid a double-NAT issue that some places say is a performance killing thing; not that I have seen it kill any performance either way.
SD1
If the WAN of your DIR-655 has a different IP than what you get when you visit http://whatismyip.com (a private IP on your DIR's WAN is a dead give away) then your double NAT'ed, it is that simple. Private IPs start with 10.x.x.x, 127.x.x.x, 172.16.x.x, 168.254.x.x or 192.168.x.x.
Double NAT'ing does not kill performance (other than adding a little latency so your traffic can be NAT'ed twice), it potentially kills specific types of traffic, and if configured wrong potentially all traffic. The biggest reason we preach against it though is it makes troubleshooting neigh impossible.
The real reason I am here though is to say it looks like your wandering off topic, you might try starting a new thread, or explaining the connection so that your problem gets the attention it deserves.
*** Modified by Fatman who forgot the original reason for his post.
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OK I ran the tests after making the modem lose connection. I was not able to ping 4.2.2.2, my gateway IP or Google.
(http://forums.dlink.com/Users/elliot/Desktop/Picture 1.jpg)
What are the IP's listed in the routers WAN page when it's working?
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The IPs listed are my ISP gateway and my external IP as given to me by my ISP. They dont change when it does not work either. The routers status page looks like nothing has happened, but in reality the router in no longer passing data.
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Are they pingable when it works?
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yes
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A little extra info. My external IP is DHCP assigned, but it never changes. It is locked to my MAC address. So each time the router reboots or the modem reboots I always get the same IP, month after month after month. So after I reboot the router the status page looks just like it did before it locked up, only the up time counter resets back to 0 hours. And yes the up time counter is continuing to count forward during the entire time that no data is passing. So in that respect the router thinks its still online. But if I do a release and renew IP on the router it comes back to life. Its almost like the router does not accept getting the same IP address from my ISP unless it is forced to.
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What are the IP's listed in the routers WAN page when it's working?
IP Address: 75.181.12X.XX
Sub Net: 255.255.240.0
Default Gateway: 75.181.112.xx
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Are they pingable when it works?
I would post screen shots if I could, but the forum does not seem to allow that.
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Whats the WAN port speed set to?
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100
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Hmm, I assume you've tried auto or 10?
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hmmm, actually no. I have had it set on 100 since day one since that is the speed of the ethernet port on the modem. But I will try it in auto and run the test again.
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Tried the test again with the router in Auto, same problem. Modem indicator shows that the ethernet port is alive, router status page says the router is on line, no data. Cant even ping the modem.
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IP Address: 75.181.12X.XX
Sub Net: 255.255.240.0
Default Gateway: 75.181.112.xx
My newly acquired IT knowledge seems to be failing me. Aren't Sub Net masks usually in the range of 255.255.255.255? If the above Sub Net mask is correct, how would one configure the LAN Sub Net mask?
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Mr.Clancy,
I invite you to learn about the wonderful world of subnetting at http://www.learntosubnet.com Tis a wonderful world full of complicated math.
I ALWAYS cheat when it comes to subnetting and use a SUBNET CALC. Also available for googling at google.com.
-Lycan.
p.s. Once you know subnetting, the secrets of the universe will unfold before your very eyes and the meaning of life will become available to you.
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Mr.Clancy,
I invite you to learn about the wonderful world of subnetting at http://www.learntosubnet.com Tis a wonderful world full of complicated math.
I ALWAYS cheat when it comes to subnetting and use a SUBNET CALC. Also available for googling at google.com.
-Lycan.
p.s. Once you know subnetting, the secrets of the universe will unfold before your very eyes and the meaning of life will become available to you.
You should not be publicly admitting such arcane secrets, now we are going to have hundreds of neophytes properly using subnets. Next thing you know home users will understand networking! Though the answer to Life the Universe and Everything is already well published, I don't know why you would brag about it so.
P.S. Cheater Cheater Pumpkin Eater! As you know I still do all my subnetting by hand, I swear it's easier that way.
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So have we exhausted all ideas on this problem?
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Did you try 10 Mpbs?
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no just auto. I do not want to connect at 10, my internet connection is faster than that
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I understand that, it's a test.
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Ok when I get home tonight I will try 10. around 5:30 eastern time.
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If it stays stable at 10, then you should ask your ISP for a new modem.
There's a compatiblity issue we've seen in the past, I thought it was cleared up but maybe not.
When you reply list the MFG of your modem and the model.
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Motorola SB-5120
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I ran the test with the router set to 10. Same result. I then thought of something I never tried. What If I did the same test but this time with the modem hooked up directly to a computer. The same thing happened. So its not the router, its the modem. It just does not want to talk to any NIC after a reboot unless the NIC also reboots.
So thanks you for all the help I really appreciate it. I am now going to turn this issue over to Motorola.
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I ALWAYS cheat
-Lycan.
Hmmmm. Does that include taxes, games, hours worked, etc..? heh :-\ ??? :o :'( :P ::) :-*
-sarcasm off-
I went to that web site and I was going to start my lessons but it kept choking each time it tried to install an activeX component. So, I went and installed it separately from the MS web site and after that, I lost interest. BUT, I'm planning to go back and when I do - I will know everything there is to know about IT and subnets. The next step will be to usurp your authority on this web site and to contradict everything you say. (sarcasm on/sarcasm off). My interest was piqued when I noticed that it involved binary math. I took a class in Boolean algebra (when I went to college. Yes, I actually went to college so that makes me dangerous). It was the most intresting math class I've ever taken. I learnt how to cipher in base 2, base 8, and base 16 and back again. "naught + naught = naught". Uncle Jed always did like to hear me cipher. I also am a logic gate reducing fool.
I noticed that Fatman is trying to show you up. How can you work with him? (I'll have to compliment him in a separate post). I am going to throw away my Tibetian book of the dead and put my statue of Buddha back in the box. This "learn all about subnets" web site has become my new guide to life and prosperity and happiness. The D-Link boards are so much more than people coming together to gripe discuss and solve problems. Thanks, Lycan. Can I call you Bodhi?
Footnote: I am still curious to know why GVG's ISP assigned him a subnet mask that ended in 0. It raised an eyebrow because I'd never seen that before. I'm gonna have to go to school to figure out how he is going to assign his local subnet mask. (I don't suppose you'd care to divulge that information before I go to school, would you?)
Footnote to my footnote: GVG publicly stated that you helped him solve his problem. What went wrong? (do you get points for that? - you know, like those "expert" web sites that help you solve computer related problems that gladly take your money for telling you the same thing you can find using a rudimentary Google search) I think you've one-upped Fatman. Tell us how you rubbed it in and detail your methods of office humiliation.
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0 in the last octect is one of the most widely used scenarios for subnet masks.
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Davevt, I am familiar with seeing that as a local sub net but never as the WAN sub net mask. My WAN sub net mask is 255.255.255.255 but my LAN sub net is 255.255.255.0. GVG reported that his WAN sub net (from his ISP) is 255.255.240.0. Because of my inexperience, seeing this threw me for a loop. Hence my query as to what his local sub net mask would be if his last octet is already 0.
I haven't finished my lessons yet but I did start them. Be afraid, Lycan. Be very afraid.
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Mine right now is 255.255.248.0
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Mine right now is 255.255.248.0
Is that your ISP sub net mask?
I need to hurry up with those lessons.
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( Trying to Help Clancy's Head explode ;D )
Mine is like the others 255.255.240.0.
Here's a tip for you studies- if the number in the subnet mask octet is 255 then the corresponding IP addresses have to be the same number...
(LOL, I haven't thought about any of this stuff in many many years- took the N+ test back in 2000 but have since replaced those brian cells with other more useful information)
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Is that your ISP sub net mask?
I need to hurry up with those lessons.
WAN - 255.255.248.0
LAN - 255.255.255.0
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WAN - 255.255.252.0
LAN - 255.255.255.0
;D
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Thank you Xinot, thank you Kevtech, and thank YOU Davevt31 for making my head explode. It was just like one of those champagne poppers on New Years Eve: nothing but confetti. This is all very interesting stuff. Now I just need to apply myself in order to make sense of it all.
Thanks to Lycan for helping educate me.
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My Pleasure.
GVG - Motorola has issues with that modem. See how quick we are to blame ze router? for shame. ;D
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To let you in on the big secret, (and potentially one up Lycan) I will drop the critical difference between you and them Clancy, I bet you are using PPPoE and they are (probably) not. PPPoE tends to use an empty netmask (hence all the 255s) because it is PPP traffic encapsulated over Ethernet and it is essentially unrouted. This of course becomes less true with business class DSL where there are multiple public IPs to assign.
LAN subnets bear no relation to WAN subnets, due to the influence of NAT. You are using a single IP on the WAN side, if this was direct routing you are right the size of the mask on both sides would be more important.
Now your lessons include PPP and PPPoE as well as IP subnetting.
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To let you in on the big secret, (and potentially one up Lycan) I will drop the critical difference between you and them Clancy, I bet you are using PPPoE and they are (probably) not. PPPoE tends to use an empty netmask (hence all the 255s) because it is PPP traffic encapsulated over Ethernet and it is essentially unrouted. This of course becomes less true with business class DSL where there are multiple public IPs to assign.
LAN subnets bear no relation to WAN subnets, due to the influence of NAT. You are using a single IP on the WAN side, if this was direct routing you are right the size of the mask on both sides would be more important.
Now your lessons include PPP and PPPoE as well as IP subnetting.
Fatman, my head already exploded once. Thanks for piling on. And, yes, your IT Jedi skills are still sharp. I am running PPPoE. Has Lycan waved at you this morning? You know, the Italian "good luck" sign?
I susbcribe to Fiber Optic and it comes right out of the wall and into my router as if it were a LAN cable. Or WAN cable. No stinking modem for me since I ditched Cable internet as fast as was humanly possible when FiOS came riding into town. All of my cable boxes are tied to the router and it is somewhat humorous when speaking to tech support and I inform them that I no longer have one of their branded routers (the original was a DIR-615). You can almost see their head shaking over the phone line as they spout "Oh, I don't know about that...blah blah blah". My DIR-655 plays very nicely with their service. They expect you to pay for steak but only want you to cook hamburgers (I stole that line from some other guy who took the plunge and gave the "Italian good luck sign" to Mamma FiOS and their router). There are still many features on this router of which I have no idea what they are for. Like "static routing" for instance. Learning about sub-netting is but one step in the long process of taking your jobs away from you - since I will be so much better at it than you guys (in 20 or 30 years). The "Slingbox" uses port forwarding and sets itself up automatically. That works fine and dandy. I can watch my own TV from my Dad's house on his computer. What a complete waste of time! Do I hear snoring?
OK, I'm done.
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My Pleasure.
GVG - Motorola has issues with that modem. See how quick we are to blame ze router? for shame. ;D
Could you expand on that? What exactly are the issues? I own this modem so I have to decide if it is worth the money to replace it. In other respects it works well, its very fast and works well with my Apple computers.
For some reason a few years ago when my ISP went to Ambit modems that were based on the Broadcom chipset, my Apple computers, as well as many other people who posted in Apples forums, noticed a drastic throughput reduction on those modems vs. the Texas Instrument chipset based modems. Windows PC's were not affected. So I bought the 5120 because it was the only TI based modem left in Motorola's lineup.
The issue may have been resolved in the following years, but I don't know as I have not had another modem to test.
I have contacted a friend who works at the ISP to see if he can bring a modem by the house so I can see if it resolves the router freeze issue, and if the throughput issue has also been solved.
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It's usually a auto negotation issue with the modem. I'd ask for a replacement and see if the issue presists. Maybe ask for a different model or make.
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Has Lycan waved at you this morning? You know, the Italian "good luck" sign?
That is the morning howdoyado around here, we are a friendly bunch.
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I tried another modem today, an Ambit. I ran it through the same test and it worked just fine. After rebooting the modem within 30 seconds I saw the router release and renew its IP, something I never saw it do with the Motorola modem.
Time for a new modem.
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So does anyone recommend the D-link Cable Modem, the DCM-202?
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Hi,
I used a DCM-202 for some time, until Comcast introduced their Powerboost technology. Somehow Comcast would not set up a proper configuration on their end to allow the DCM-202 to work with powerboost....
So I sold it to some nice folks who needed a reliable modem.
SD1
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There is a firmware update specifically for Comcast users. Yet I have am not able to figure out for myself how to install it as the DCM-202 requires the use of a "hyper terminal" connection in order for their supplied download manager application to connect to the tftp server.
Any ideas? I am running Windows Vista 64-bit.
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There is a firmware update specifically for Comcast users. Yet I have am not able to figure out for myself how to install it as the DCM-202 requires the use of a "hyper terminal" connection in order for their supplied download manager application to connect to the tftp server.
Any ideas? I am running Windows Vista 64-bit.
I am pretty sure that I had the DCM-202, and even with that comcast firmware, it doesn't support powerboost either.