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Intermitten Connection Problem

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haxx77

MIS
Joined
Mar 6, 2001
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77
Location
US
My network has 80 nodes through a T1. Our DNS is through the ISP. I have noticed that sometimes a computer cant see the DNS server for a few minutes. The connection will be there, then it is lost only for a few minutes. Then it comes back on and resumes. This can happen on any computer on the network. I can still see the DNS from other computers while this is happening. This problem isn't isolated to any one machine. Is there a limitation for nodes that can access the DNS at one time from a given network? or is the DNS overloaded?
 
Tough to say what the deal is without a better understanding of how your network operates.

What kind of network is it? (ie token ring, ethernet, etc.)

How is your network designed? (ie extended star, ring, etc)

Do you use routers, repeaters, switches, bridges, etc. and is it possible that the problem is occuring on a specific segment and not really the whole network?

My initial guess was that at any given time a segment was experiencing excessive collisions and causing a jam signal. This would explain why after a couple minutes it is back up. In that instance it would be as simple as breaking up some collision domains with additional switches or if the cheapest route is necessary some bridges.

I hope this rambling makes some sense as I am big time tired this morning, where the heck did I leave my coffee?

Jason

 

Ethernet Network.

5 seperate collision domains (3 com super stack 100's)

Fed with a (3com Switch 1000)

5-10 computers per collision domain.

Cisco 2600 - T1

- Internal Network speed is excellent.

 
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