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#1 2003-01-05 1:34 pm

SweetSounds
Member
From: Montreal, Quebec, Canada
Registered: 2002-01-07
Posts: 7
Website

Computer having problems recognizing the router...

Hi,

I'm having a strange problem. I normally have a flat panel iMac but it's in the shop, so Apple has loaned me a PowerBook. I have a cable modem connection and I'm behind a router, sharing the Internet connection with a PC. I am running Jaguar with the latest update.

Everything seemed to be working fine until some time last week. Now, when I start the computer, it doesn't recognize the router : it gives itself a self-assigned IP adress outside of the network and can't connect to the Internet. Usually, if I reset the router and wait a bit, it finally sees the router and gets the right IP, but sometimes, I've had to reset more than once, even disconnect the PowerBook from the router and reconnect... Also, I have the same problem when the computer wakes from sleep. I didn't have this problem at first and never had it with my iMac. The PC doesn't have ANY problem. Could this have to do with the computer itself, or with Jaguar 10.2.3 ? Does it have anything to do with the router ?

Also, I now can't seem to connect to the PC. I can see the PC, I even get asked for the password, but then, I can an "error -36" message and find this in the Console :

kextload: extension /System/Library/Extensions/smbfs.kext is already loaded
mount_smbfs: unable to open connection: syserr = RPC struct is bad
mount_smbfs: could not login to server MARC: syserr = RPC struct is bad

Again, I don't know what is causing this problem, the latest Jaguar update, the computer or the router. Any ideas, someone ?

Finally, I am really wondering about the router. Has anyone heard anything bad about the Belkin F505230-4 4 port router ???? blush

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#2 2003-01-05 6:24 pm

matthewc
Member
Registered: 2002-06-30
Posts: 49
Website

Re: Computer having problems recognizing the router...

have you tryed to just take that ip so the computer will awayse have it. that is what I do with my home computers and it works fine. that should give you a connection no matther what

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#3 2003-01-05 6:30 pm

SweetSounds
Member
From: Montreal, Quebec, Canada
Registered: 2002-01-07
Posts: 7
Website

Re: Computer having problems recognizing the router...

I tried that at one point and it didn't work, for some reason, maybe because even with the adress put in manually, the computer didn't recognize the router. Maybe I should try again. However, there is NO reason why it should have worked for a while, then stopped working. I don't mind putting in my IP manually, but I shouldn't have to. It still means there is a problem somewhere and I would like to solve it.

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#4 2003-01-06 10:10 am

SweetSounds
Member
From: Montreal, Quebec, Canada
Registered: 2002-01-07
Posts: 7
Website

Re: Computer having problems recognizing the router...

Well, I tried plugging the Internet connection directly into the computer instead of in the router and of course, everything worked without a hitch. The problem really seems to be at the router level... Really, no one has any ideas ????

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#5 2003-01-06 6:54 pm

djdawson
Member
From: Minnesota, USA
Registered: 2001-04-19
Posts: 1860

Re: Computer having problems recognizing the router...

Sounds like it could be a bad router or router port, but, strange as it sounds, it could also be an ethernet autonegotiation failure.  Even though it's been working for a while, it's not unusual to have autonegotiation just up and stop working foor no apparent reason one day and then refuse to work again.  I work in the networking business and have seen this several times.  If you have a small, cheap 4-port hub or switch, putting it between the router and the Mac may help, since now the devices are negotiating with the hub instead of each other.  Otherwise, it could also be the cable, so you could try a diferent one and see if that helps.  Because of the liklihood of an autonegotiation problem, I'd hang onto the router until you get your Mac back.  Alternatively, you could try some other computer and see if it works reliably.

HTH - Good luck!


Dana
[MA]{O}FSG

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#6 2003-01-06 7:24 pm

SweetSounds
Member
From: Montreal, Quebec, Canada
Registered: 2002-01-07
Posts: 7
Website

Re: Computer having problems recognizing the router...

That was actually a very helpful reply. I probably will wait until I get my iMac back. In the meantime, I took myself off the router and plugged the cable directly into the Ethernet connection : my partner is in Europe for a few months and so I don't need to share the connection. Everything now works just fine. I also need the router for the laser printer, but I don't print that often and can also print on my inkjet, which uses the USB port.

I noticed something else : behind the router, no matter how I set it up, I can't host a website on my Mac, whereas when I'm directly plugged in, it works fine. Behind the router, even in the DMZ zone with all the right ports forwarded, it doesn't work. Finally, even on my iMac, I would regularly have strange things going on, like my MSN contacts repeatedly going off-line, then on-line again during our chats... except that they did NOT experience a bad connection. The problem seemed to be at my end. I guess there could be a problem with the cable or cables, but they are new. Also, the PC connected to the router NEVER had these problems. It seems to be happening between Macs and the router. So maybe you put your finger on the problem. We'll see what happens when I get my iMac back.

I've been experiencing many problems with the iMac over the past couple of months... We still haven't figured out what caused the problem (it affected speed and, eventually, my hard drive, which had to be replaced once already, and might have to be replaced again), but it could have had to do with one of my USB peripherals. I am wondering, though : could a defective router actually cause problems to a hard drive ?????

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#7 2003-01-06 10:15 pm

djdawson
Member
From: Minnesota, USA
Registered: 2001-04-19
Posts: 1860

Re: Computer having problems recognizing the router...

I am wondering, though : could a defective router actually cause problems to a hard drive ?????

I'm glad you found the information useful.  I doubt the router could cause hard drive trouble - I'd be more suspicious of the quality of the AC power, or possibly other environmental issues such as static or excessive dust or temperature swings.  Vibration is also bad for hard disks, especially if they're running, so don't move your machines around while they're running if you don't absolutely have to.

The intermittent networking sounds more and more like the negotiation issue.  If you have a small hub (you can usually find them for $30 US or so), try putting that between the router and the Mac.  Otherwise, a new 4-port Linksys router with essentially the same features as your Belkin is probably only about $50 US now, so that might be another option if you don't already have a hub (or switch) sitting around.  I've used the Linksys before and had very good luck with them.

Ironically, I have an SMC wireless router now for my Internet router and have four machines behind it - my Mac and three PC's, one of which uses wireless.  Of the other two PC's, one is an old Dell and it also developed an abolute refusal to properly negotiate the ethernet speed and/or duplex after working fine for several months.  Replacing the ethernet card worked for a few days, then the problem came back.  I ended up forcing the ethernet card in that PC to 10 Mbits & Half Duplex and now it works fine, but even though I work on this stuff all the time it was a hard problem to find, especially since a different card seemed to fix it and then it broke again.  Actually, I think OS X 10.2.3 now allows you to do the same thing, so you could try that, too if your loaner laptop happens to be running that.  You'll need to use the "ifconfig" command in the terminal, so if you want to try that let me know (I'll set this thread to notify me of replies just in case).

Good luck!


Dana
[MA]{O}FSG

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#8 2003-01-07 12:46 pm

SweetSounds
Member
From: Montreal, Quebec, Canada
Registered: 2002-01-07
Posts: 7
Website

Re: Computer having problems recognizing the router...

Hi,

Thanks again for your reply. I don't really know what I plan to do... First, I'll wait until I get my machine back. It's a very strange problem, that slowing down thing. Very erratic. I used the computer without a hitch for months and then, boom... But not long after trying that webcam that could be at the cause of it : when I unplugged it a couple of weeks ago, my computer actually shut down... and it happened twice. But I did wonder about an electrical problem, or even if my computer being very close to a window (indeed, a wall) that have poor insulation... and being in Montreal, it's COLD here right now. Anyway, it's strange. It'll work fine at first, then, when I start using it, sometimes within minutes, it'll happen : the first time I'll start up a program, it'll take forever. If I quit the software and start again, it'll start up normally... Certain things will suddenly take a long time : it wonce took me an hour and a half to burn a CD ! When the problem happens, if I restart the computer, the whole process can take from 7 to 15 minutes. And this is on a new flat-panel iMac.

As for the router, well, I'll wait and see. I'm not behind the router now and can do everything, including hosting a website. Maybe there IS a problem with router, maybe it's what you mentioned. As for that last thing you talked about (and that you said I could do in Jaguar), I have NO idea what that all means. :-)

Anyway, I have to go for now. I'll keep you posted. If you have any other thoughts or ideas, don't hesitate.

Thanks again.

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