Hi DevendraI get a lot of BB101 error. This is because the switch from your cables are connected to your PC is not able to transmit data. You can check that out by sending a ping to your default gateway (you might get a "Request Timed Out" in this case). What I usually do is call my CTO and they fix it. The problem is, they will take their time to come and you lose that much connection time. Now, heres a catch 😉 , I have learnt that a possible reason for this error is that the switch gets hanged and fails to transmit data. Try to see which switch is you are connected to. Go to that switch. This should look like a modem which a power plugged at the back and a few ports (ports of the ones which are the other end of the plugs to your PC's network cards). Take off the power plug, wait for some time - maybe a minute - and plug it back in. This will reset your switch and you should get your connection back. Now there are times where your switch is connected to another switch and that switch might be hanged. In this case this wont work, but this is worth a try. Best call your CTO - the ones who have installed the cables - and they will do the rest. However, they will not be able to help you in case of slow browsing speeds. For this, you might have to call the Customer Care guys (of course if they can help).