These are the ones in the current mibExpr.conf, and are what I have been
using for years. They are what was outlined some time ago in a Cisco
document that covered recommended mib monitoring. Both should
usually be thresholded at 1%, depending on your network. I'm presently
using the ErrorRate on WAN links and find that repeated thresholds
exceeded of more than 2% or 3% generally presages a link failure.
DiscardRate \
" (ifinDiscards+ifOutDiscards) * 100 \
\ (ifInUcastPkts + ifInNUcastPkts + \
ifOutUcastPkts + ifOutNUcastPkts)" \
.1.3.6.1.2.1.2.2.1.13. \
.1.3.6.1.2.1.2.2.1.19. + \
.1.3.6.1.2.1.2.2.1.11. \
.1.3.6.1.2.1.2.2.1.12. + \
.1.3.6.1.2.1.2.2.1.17. + \
.1.3.6.1.2.1.2.2.1.18. + / 100 *
ErrorRate \
" (ifinErrors+ifOutErrors) * 100 \
\ (ifInUcastPkts + ifInNUcastPkts + \
ifOutUcastPkts + ifOutNUcastPkts)" \
.1.3.6.1.2.1.2.2.1.14. \
.1.3.6.1.2.1.2.2.1.20. + \
.1.3.6.1.2.1.2.2.1.11. \
.1.3.6.1.2.1.2.2.1.12. + \
.1.3.6.1.2.1.2.2.1.17. + \
.1.3.6.1.2.1.2.2.1.18. + / 100 *
Cordially,
Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit
netview@toddh.net
(Todd H.) To: nv-l@lists.tivoli.com
cc:
05/10/2002 06:27 Subject: [nv-l] packet errors
-- how do you monitor?
PM
Please respond to
nv-l
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/
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