[mrtg] help with monitoring PIX 520 CPU and Memory Usage

Ed Grant ed.grant at raremedium.net
Mon Nov 18 16:35:07 MET 2002

Hello All,

I am trying to monitor CPU and Memory usage on my PIX 520 with 3
interfaces(internal, external, dmz) and running PIX version 6.2(2). I have
gone through the archives and found some OID's for the PIX but they didn't
work for me? I am able to monitor the three interfaces on my PIX just fine,
but when I try to configure CPU and Memory monitoring, I can't seem to get
the correct OID string.

Here is what I added to my cfg file for Memory usage. A graph was created
with these OID's(unlike before with the incorrect OID's), but there is no
data in the graph, it just says 0 and has been running for days. If I use
getif, I am able to query the PIX and return the current memory in use and
current memory free, using the OID's that I used in my cfg file. So I know
that I have the correct OID's for Memory usage, but MRTG is for some reason
not graphing the data?
(for this email i spaced between line wraps)
Target[pix_memory]: at 0.0.0.

Title[pix_memory]: Memory Utilization for -- pix
YLegend[pix_memory]: Memory
LegendI[pix_memory]: Memory Used
LegendO[pix_memory]: Memory Free
ShortLegend[pix_memory]: %
Options[pix_memory]: growright, gauge, integer, nopercent
MaxBytes[pix_memory]: 100
PageTop[pix_memory]: <H1>Memory Utilization for -- pix</H1>

According to the "reference.html" doc, I can specify my own OID values to
monitor a object, but need two values. I came across this post for the CPU
monitoring, but it only had the one OID value and did not work for me.

I read up on Cisco's SNMP implementation on the PIX here:

Can someone shed some light on this for me?   TIA

Ed Grant  |  Director of Information Technology
rare Medium Atlanta, LLC.
ed.grant at raremedium.net
(w) 770-576-4397  |  (f) 770-576-4200

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