[nv-l] packet errors -- how do you monitor?

[netview@toddh.net (Todd H.)]

Howdy, 

I've got a best practices/survey question for the masses.   How are
you monitoring interface error rates? 

Given my (possibly incorrect) assumptions:
        o all the MIB2 variables you need are are COUNTER's (absolute from
          when box booted): ifInErrors ifOutErrors ifInUcastPkts
          ifInNUcastPkts ifOutUcastPkts ifOutNUcastPkts

        o you need to make a calculation of the current datapoint
          subtracted from the last polled sample for 6 different
          variables 

        o and NetView can't combine the functionality of mib.coerce
          and mibExpr.conf....

..I don't see how you can do it with NetView. 


The equation I think needs to be solved is:

  "%errors_over_past_polling_period= delta total error / delta total  traffic" 

or specifically, 

 ((ifInErrors(t2)+ifOutErrors(t2)) -
 (ifInErrors(t1)+ifOutErrors(t1)))  
 /  divided by the quantity
 (
 (ifInUcastPkts(t2)+ifInNUcastPkts(t2)+ifOutUcastPkts(t2)+ifOutNUcastPkts(t2)) -
 (ifInUcastPkts(t1)+ifInNUcastPkts(t1)+ifOutUcastPkts(t1)+ifOutNUcastPkts(t1))
 )


Can anyone elighten, debunk, confirm or provide another way to monitor
a percentage of packet errors in NetView? 

-- 
Todd H.
http://www.toddh.net/