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Network Setup

By Houston_texan2002 ·
I have a network set up in my home office and two remote offices with users that connect to my network Via Termina server. They have no servers at all. The home office has over over 10 Windows 2000 servers and two cisco 2600 routers and a pix firewal. All the remote offices have T1 lines with one cisco 2600 firewalls. Th rempote offices always complain of slow network connections. What is the best secure way of setting up my network so that all users can login to my network and avoid the slow connection speeds. There are about 6 users in each of the two remopte offices. Please assist.

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by CG IT In reply to Network Setup

Terminal services in application server mode takes a huge chunk of overhead. Even if you have the bandwidth to support huge amounts of data transfers, the server themselves might not be able to handle the load of a lot of users. You say there's 10 servers, but you don't say how many are clustered and whether you use nodes. If you do cluster nodes, then it might be that you have to create a couple more nodes to balance out the load.

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by Oldefar In reply to Network Setup

D.R. is right, and what you need to do is to first identify where the "slow" connection really is. Users consider eveything past the keyboard as network.

Hang a sniffer on the LAN segment and filter on the user IP and the server he is attaching to. Use a local workstation using Terminal server connectivity. Have a use step through a task and look at the traffic and delays from hitting enter until ready to begin the next step. From this you will have several key pieces of data.

1) Actual traffic transmitted (volume and content)
2) Server time
3) Client time
4) LAN transmission time

If the bulk of the time is on the server, this is where you apply your efforts. The volume and content of the packets are useful here as well. Often the transmission is more overhead than data and this can often be cleaned up with a little thought.

If the bulk of the time is on the client, then look at your CPU and memory. You may very well have resource issues resolved with hardware upgrades.

If the bulk of the time is transmission on the LAN, you have network issues. On the LAN, congestion and volume of this particular task are the likely problems. Congestion is resolved through reducing collission domains. Volume is back to the application.

A T1 should easily support upwards of 60 plus users of network centric designed applications. You pay for circuits forever, so your best value is in good application design, not more bandwidth.

If the application smokes on the LAN, you may need to look at latency issues between sites. Divide your volume by bandwidth to see how long your wire time should be. Subtract that, server time, and client time from total time remote users experience and you will have a good approximation of how much time latency is adding.

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by Kinetechs In reply to Network Setup

Questions:

1) Are the T1s point-to-point with the home office or Internet T1s?
2) Are the T1s full or frac? Any channels dropped to a phone system?

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by Houston_texan2002 In reply to Network Setup

The T1s are full point to point with no phones.

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by supern0t In reply to Network Setup

Yes Terminal services takes a lot of overhead both network to network and server side. Also true we have no idea where exacly the "slow network" issue is. One sollution for reducing both server overutilization and T-1 bandwidth overhead is seting up VPN tunnels between the routers and dumping the Terminal Server solution all together. Unfortunatly this requires a lot of reconfiguration and also a big change for the users.

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by Houston_texan2002 In reply to Network Setup

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