Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Performance problems with 2950 switches and 1721/2610 routers

We've just installed several Cisco 2950-24 switches in our office with a Cisco 1721 router attached via a leased line (256k) at this end to a 2610 at the other end to our mainframe.

The switches are not in a cluster, and are connected to a 2950c-24 via cross-over cables in which the 1721 router is also attached. The IP addresses of all the switches are manually set with no other parameters changed on the switches.

A large number of our users are having major response problems accessing data from the mainframe especially email (Lotus Notes) and the data extraction tools.

Apart from the most obvious solution of upgrading the line speed at extra costs, is there any tool or are there any settings that I could look at or change on either the switches or router which could solve the problem.

  • Other Network Infrastructure Subjects

Re: Performance problems with 2950 switches and 1721/2610 router

Please check the following details:

Serial lines:

- Make sure that the bandwitdh parameter is set correctly on the serial lines.

In your case this should state: bandwidth 256

- Turn off compression (if any)

- Try to set ip tcp header-compression on and off, and keep the setting that performs best.


- Check for any duplex mismatches between the devices.