Lots of input errors...

[Shawn Ramsey]

> netstat -I xl0 -w 1
           input          (xl0)           output
  packets  errs      bytes    packets  errs      bytes colls
     6918    22    8525822       5631     0    2770466     0
     7317    21    9262852       6041     0    2696855     0
     7839    26   10090955       6426     0    2686936     0
     7260    14    9318261       5789     0    2407180     0
     6653    14    8255322       5552     0    2693452     0
     7818    17    9966908       6323     0    2693943     0
     7003    12    9056270       5406     0    2250436     0
     7104    17    8904400       5963     0    2815142     0
     7287    12    9185995       5937     0    2747249     0

This seems excessive. What are the likely causes of this other than say a bad cable or switch ? I believe the same thing was happening on our other interface when we had this much traffic going into it, and its plug into a different switch entirely. I suppose its possible both cables are bad, but seems unlikely. Before enableing "polling" in the kernel, I was seeing 90+% usage on interupts in top, which also seems excessive given we are moving less than FE traffic.