Need help with GB network disappearing at school.

My school has like a 480Mbps connection and I have a few times pulled the Gigabit Ethernet cable out of the computers in the computer lab and plugged it into mine so i can download full speed. I started to download my steam account there and i got BF:BC2 done in 8 mins. They ended up close so i came back today and now I connect the Ethernet cable and it disappears in 30-60s no matter what i do it wont come back. I tried in several computers and all the same the Ethernet disappears and wont come back on my computer or the original computer it was plugged into. Does anyone hear got any ideas on why and how this happens? I have never seen an Ethernet connection completely disappear where you can't even see it. Also worse case is there a work around where i can bridge from the lab computer to mine or something? Thanks for your help. I hope I can get this figured out because it'll take ~144 hours if i use wifi compared to 21 hours tops :/ I get 3MBps average on wifi and range from 10-50MBps on Ethernet and average ~20MBps

 

Maybe a MAC address filter?

 

What does that do? Is there a way around it?

 

That can't be discussed here. If there is a MAC filter implemented it's a (lousy) security measure and we can't discuss ways to get around it.

 

we don't even know if thats it download What could it be though keeping me from using ethernet? at least help me figure out what they use don't need to tell me how I'll figure that out on my own. Who says its a security messure anyways....it could be a glitch Anyways too you think they would use that? They probably have a 1000 computers their....wouldn't that be a pain to set up and too time consuming? and how would they do that in 2 days? super IT team? Also does MAC filter take 60s to work?

PS a simple google search gave me a huge walk through with all the files and pictures too! I am just curious on what they use and what could cause this....its very weird that it happened in two days and i have never seen this before so i want to learn! DL don't take my learning experience away!!!!!

 

MAC filter would be impractical and it wouldn't work like what you describe.
You would never get an IP in the first place- no disapearing after 30 seconds or so- just no connection at all.

 

i pulled it out from a computer though that already had a connection so how long would it take for it to register? What could it be if thats not it...i find it weird it works for 30-60s and disappears...you can't even see it and it won't register at all as if the cable was dead. Then when you connect it back to the computer lab PC it says some server error message saying server can not be reached or something. Would that message be helpful?

 

More like their lousy router/server config and windows software problem. Try use the repair connection from windows or restart after you plug the cable in.

 

nope the trouble shoot doesn't do anything...says you need to plug in network cable. So maybe plug in when computer is off and turn it on from there?....seem a little hokey to me

 

could be an auto-sensing switch or router noticing the change and dumping the IP address on that lane after 30 seconds. we have managed switches/routers at work that assign IP addresses by the port not by device, and if it sees a MAC address not in the database it dumps the lane ( switch port ).

in which you would need permission from the IT dept and your MAC added to the list.

 

so thats just an added feature to mac addressing? so it still uses MAC address to verify? devices?

 

sometimes just MAC address, sometimes MAC address plus a security key hidden on the devices network driver or a separate application or service

 

isn't that impractical to set up 1000 computers? also this happened two days later so did they really do that in 2 days?...or 2-7 days because first time was 7 days ago

 

no very practical and simple to implement with the right infrastructure

 

and what would that be? I am interested in this because i never knew of this stuff and it sounds fascinating can you elaborate?

 

not really, my husband is the network person and has just taught me the basics on some of this stuff. If he has time I will have him post up some of the basics, or if your big on reading find a network administrators guide for cisco or netgear managed routers and switches.

 

yea route 2 i don't have that much time lol. Want to know where a good direction is to look not the whole field ^-^

BTW Thanks i got he has a spare min

 

BTW got a usb ethernet connector that is plug and play so i am going to see if i can bridge that ^^

 

You can stop trying to do that right now. IT in your school is already recognized the traffic pattern and blocks the traffic. There is no other way around. I can tell you that the equipment that blocks your traffic is very expensive. If you keep doing it, they will block you from network forever. I can't tell you how they do it. It is a trade secret.

 

Lol yea trade secret

 

Well, it is hard to explain. If I throw some concepts to you like VLAN, HSRP, EIGRP, OSI model, 802.1x, private key and public key infrastructure or the concept of NAC, you would not understand any of those terms. I just let you know that your school IT know more than you think. I know that some universities in IL runs IS-IS and IPv6 inside their network. Trust me, your problem is beyond help from people in this forum.

 

well now i know where to google...Also they didn't stop what i was doing just using gigabit. I do the exact same stuff over wifi...the data is not the issue. They due use IPv6 though. Over the week i'll google those terms and read up on those concepts

EDIT:
yea i just quickly skimmed those terms and NAC is the only real useful one. I'll due some testing over the next few weeks. I am doing to try the usb ethernet and MAC address filtering first to see if that is just what they are doing or more. I will let them know though if i find a hole since they closed off just plug and play ethernet it is obvious that they don't want that to work. ^^ odd though how it worked two times for several hours in a two week period......lazy IT people lol.

 

Please let me know how it goes, but I have nothing to do with it okay? LOL! Yeah, you can google those terms, and read it up. If everything is so easy to hack, I would have to change my career to sell donut instead. Your best approach is talking to them would be a better choice. I think they would understand. Your school was trying to sell the concept on IPv6 at my place, but I didn't buy it. Their network is huge though, but it doesn't necessary to run IPv6 in my opinion. If you can outsmart them, you might be the director over their IT. My money is still with your school IT though.

 

BTW tried once with the usb ethernet and no cigar....USB ports seemed to die after plugging it in but i'll try again next week i think over break