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QOS of Telnet Traffic

I have a business with 512k frame connections at all the remote sites. In most cases this bandwidth is excessive as the primary application is a telnet app that uses vert little bandwidth. The problem is that when a user starts downloading a file from the internet and/or other source accross this frame connection, our telnet application lags and the telnet print jobs that our server sends out times out before being printed.

Question 1: What commands can I give our core router, a 2600, and/or the 1700s at the remote location to ensure that NO lag is encountered on port 23 traffic. Internet traffic is important, but their needs to be NO lag on our telnet app.

Question 2: Our SCO Unix server, the server that runs our telnet app, uses a program called VisionFS to send print jobs to shared printers on our network. I need to ensure that their is bandwidth and no delay for these jobs as well. What ports/protocols does this use to communcate and can I use the same infro from question one to apply to this QOS.

Thanx for any help in advance,

Dennis Burgess


Re: QOS of Telnet Traffic

You can prioritise your Telnet traffic, TCP port 23, with either Custom or priority queuing.

This is explained in the following URL -

You can prioritise VisionFS in the same way. Apparantly it just uses the standard UDP ports for Netbios over TCP, ie 137, 138 and 139. I got this from the following URL -