BlackDragon24 Posted December 16, 2005 Posted December 16, 2005 So I've posted about this before and received very little feedback because it does not seem to be a common problem.... I have serious network connectivity issues. I normally use the Marvell controller because getting the nvidia controller to work at all is a joke. Here's the situation... I live on campus so I have built-in University T3 lines (stop drooling) into my apartment, where i can simply plug in and surf. In my network properties if I set "Obtain IP address automatically" (DHCP) Then I will normally get an ok connection for about 15 min or so after bootup.....then all of a sudden, for whatever reason, I'll lose connectivity....no ability to find websites, just a constant "connecting to 2.2.xxx.xxx.xx" on the bottom left of my IE screen. OK so I document the settings when I have connectivity and manually enter them into the network settings.....same problem.....if I change the last three digits of my IP address then, all of a sudden, i get connectivity...for about 10-15 min more. Then I lose connectivity again....once again I must change the last three of my IP....now I'm set for as long as I don't logoff. Connection stays good for days. Now, what is really weird, is that even though it seems like I lose all connectivity, when I do lose the connection I am still able to logon to school websites and such....like I can access my school's homepage, libraries, directories etc....BUT NOWHERE ELSE!!! As I said above getting the nvidia controller to work is a joke....I know it has something to do with my setup and NOT my internet connection because I just built an identical system for my stepdad (identical = same motherboard, mem, cpu) and did not see this problem in my apartment with his system....DHCP has been fine all along on his system. I guess it might be time to RMA....I would think it could be a software issue but it has happened to me over multiple windows installations, RAID or not. The fact that my stepdad's system is sitting right here next to mine and works just pisses me off more. Any and all advice would be appreciated here.....I am not behind a router. I have tried disabling and enabling windows firewall....I have no other firewall on my system. Quote Share this post Link to post Share on other sites More sharing options...
LDog69 Posted December 16, 2005 Posted December 16, 2005 Now, what is really weird, is that even though it seems like I lose all connectivity, when I do lose the connection I am still able to logon to school websites and such....like I can access my school's homepage, libraries, directories etc....BUT NOWHERE ELSE!!! This is peculiar. Can you resolve outside addresses? Perform DNS lookups on them? This almost sounds like an intermittant problem with your school's DNS services. Quote Share this post Link to post Share on other sites More sharing options...
BlackDragon24 Posted December 16, 2005 Posted December 16, 2005 This almost sounds like an intermittant problem with your school's DNS services. Possibly, but then explain why I DON'T have the problem on my stepdad's SLI-DR....same internet connection. Another thing....when I set DHCP on my stepdad's machine it sets the IP to .44 On mine it sets it to .139 Even if I manually change my machine to .44 I still have the problem. So weird.... Quote Share this post Link to post Share on other sites More sharing options...
LDog69 Posted December 16, 2005 Posted December 16, 2005 Possibly, but then explain why I DON'T have the problem on my stepdad's SLI-DR....same internet connection. Another thing....when I set DHCP on my stepdad's machine it sets the IP to .44 On mine it sets it to .139 Even if I manually change my machine to .44 I still have the problem. So weird.... That's normal. DHCP assigns a random, free IP to each machine that connects. If a machine is reconnected before it's "lease" expires, it will likely get the same address as before. Otherwise, it will just be a new random one. It's normal (and expected) that your stepdad's machine will get given a different number, even when connected to the physical port on the LAN. It requests the IP from a different MAC address, so to the DHCP server, its a different connection. But you're right, none of that explains why one machine can connect on either LAN port w/o problems, and you struggle to make yours work on just one. I was just hoping to eliminate a few outside variables. Can you try this next time you can only get your school's sites to work? Open a command prompt and type: # nslookup yahoo.com # ping yahoo.com Either/both/neither of these work? Knowing this may help to better pin-point the problem...GL... Quote Share this post Link to post Share on other sites More sharing options...
szurlo Posted December 16, 2005 Posted December 16, 2005 Sounds almost like you are losing access to the gateway address. That would explain the ability to hit URLs inside the local campus, but not outside..... If you want to rule out the oboard NIC, just disable both the built in NICS and install a cheap PCI NIC and see what you get. Steve Quote Share this post Link to post Share on other sites More sharing options...
BlackDragon24 Posted December 16, 2005 Posted December 16, 2005 Ok I'll give all these a shot....of course I'm having problems replicating the problem this monrng LOL Quote Share this post Link to post Share on other sites More sharing options...
drfrink24 Posted December 16, 2005 Posted December 16, 2005 If you have a DHCP network, you don't want to do anything manually. You'll most likey create a duplicate IP address, which will generate unpredictable results. What you need to do, when you encounter the problem, is run a tracert command, from a dos prompt, to lets say, www.google.com. ex : tracert www.google.com Find out how many hops you're making it on your network. If the tracert cannot even resolve the hostname, then, you're dealing with a DNS problem. You also could be dealing with a physical layer problem, with the autosense/autodetect settings between you and the physical network equipment mismatching. Quote Share this post Link to post Share on other sites More sharing options...
BlackDragon24 Posted December 17, 2005 Posted December 17, 2005 Well I've re-enabled DHCP and all seems well FOR NOW....something I've noticed....in the details of my ip configuration it shows "lease ontained" and "lease expired" function, with my lease expiring in about 5 days from now....what exactly is this? Quote Share this post Link to post Share on other sites More sharing options...
szurlo Posted December 17, 2005 Posted December 17, 2005 Well I've re-enabled DHCP and all seems well FOR NOW....something I've noticed....in the details of my ip configuration it shows "lease ontained" and "lease expired" function, with my lease expiring in about 5 days from now....what exactly is this? As Ldog69 was explaining above, with DHCP, you get an IP adress on a "lease" that lasts x days when you connect to the network. The DHCP server determines how long that lease lasts. At the end of the lease, you get a new, or maybe even the same address, again, for another x days. Also, as dfrink24 was saying, you DO NOT want to manually set your IP address if you are on a DHCP based network. You may very well choose an address that has been leased to another network client already by the DHCP server. Imagine two houses with the exact same address. Where would the mail go? You get the idea. Steve Quote Share this post Link to post Share on other sites More sharing options...
BlackDragon24 Posted December 17, 2005 Posted December 17, 2005 As Ldog69 was explaining above, with DHCP, you get an IP adress on a "lease" that lasts x days when you connect to the network. The DHCP server determines how long that lease lasts. At the end of the lease, you get a new, or maybe even the same address, again, for another x days. Also, as dfrink24 was saying, you DO NOT want to manually set your IP address if you are on a DHCP based network. You may very well choose an address that has been leased to another network client already by the DHCP server. Imagine two houses with the exact same address. Where would the mail go? You get the idea. Steve Cool thanks for the reply and the explanation....i now have it set back to dhcp...still can't replicate the original problem, but I am thinking it has something to do with the lease....We'll see when the lease expires if i see the problem... Just to plan ahead, if when my lease expires i experience the problem again, and that is the source of the problem, then how would I go about fixing it? EDIT: Ok I just did a shutdown of my system and then rebooted, and looked at my IP details again....Is the lease supposed to renew every time you turn off and then turn on your machine? Because my lease renewed at the exact time i started my machine, and now is good for another 5 days... Quote Share this post Link to post Share on other sites More sharing options...
ReD.SkY Posted December 17, 2005 Posted December 17, 2005 maybe it is just your network card ? i just had to RMA my laptop (broken modem) after owning it for 8 months things just dont last forever. Quote Share this post Link to post Share on other sites More sharing options...
BlackDragon24 Posted December 18, 2005 Posted December 18, 2005 If you have a DHCP network, you don't want to do anything manually. You'll most likey create a duplicate IP address, which will generate unpredictable results. What you need to do, when you encounter the problem, is run a tracert command, from a dos prompt, to lets say, www.google.com. ex : tracert www.google.com Find out how many hops you're making it on your network. If the tracert cannot even resolve the hostname, then, you're dealing with a DNS problem. You also could be dealing with a physical layer problem, with the autosense/autodetect settings between you and the physical network equipment mismatching. Alright...i was able to replicate the problem...I tried the tracert command from the command prompt as suggested, and it saya "maximum of 30 hops" then goes through each one, but eaxh one says "request time out" I am still abel to access my school's website and such...anything under the University's domain name. Suggestions? Quote Share this post Link to post Share on other sites More sharing options...
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