I've got a problem with a fastethernet on a 7206 VXR router. On the show int of the affected interface, you can see the drops and flushes I'm getting:
Input queue: 0/200/14/4199 (size/max/drops/flushes); Total output drops: 0
As you can see, I have increased the input buffer from the default of 75 to 200. Flushes and drops are still increasing. I have also changed to fast switching on the interface but I am still getting the same issues. This doesn't seem to be service impacting, I would just like to get to the bottom of the issue and see if it can be rectified. If anyone could offer any advice, it would be much appreciated. Many thanks.
It's difficult to find out exactly what might be causing this without knowing a whole lot more about the topology and traffic, but a good starting point is the following document (troubleshooting I/O queue drops):
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