Newbie SNMP Question
Vernon A. Fort
vfort at provident-solutions.com
Fri Jan 17 22:26:39 CET 2003
Thanks to everyone who has replied. I have gotten a Linux server's smnp
going ( which should I use, udc-snmp or net-snmp - or are they the same?)
and successfully walked the snmp tree and on our primary cisco router. Can
the check_snmp handle any OID either numeric or non numeric...?
I really only want to monitor: CPU load
Inferfaces UP/DOWN status
Alarms signals
Analyze Traffic to detect bottle necks
Use mrtg to graph over a period of time - to detect trends.
Does anyone have any sample check_snmp command strings for any of the above?
I had no idea there was soooo much information available from a simple
snmpwalk - wow....
Vernon
-----------------------------------
Vernon A. Fort (Andy)
Provident Solutions, LLC
(615) 427-4016 http://www.provident-solutions.com
-----Original Message-----
From: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of
setzer at placemark.com
Sent: Friday, January 17, 2003 2:36 PM
To: nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] Newbie SNMP Question
> From: "Vernon A. Fort" <vfort at provident-solutions.com>
> To: <nagios-users at lists.sourceforge.net>
> Date: Fri, 17 Jan 2003 11:22:29 -0600
>
> I have managed to get nagios running very well, works like a champ - great
> software. I now need to start the snmp setup and have very little
> experience with snmp. Can anyone point me do basic documentation,
> "Snmp-for-dummies" so to speak?
>
> I am wanting to monitor my 45 cisco routers as well and some unix server
vi
> snmp (specifically network traffic monitoring as well as real-time router
1) Make sure SNMP is enabled on your routers. Quick and dirty (and
unsafe):
router#conf t
router(config)#snmp-server community public ro
router(config)#^Z
2) Make sure snmpd is installed on your linux boxes. If you have
solaris, disable the snmpd master agent as well as dmi. Install
net-snmp from http://www.net-snmp.org/ per the instructions.
3) Edit your /etc/snmp/snmpd.conf. You will need to have disk and
load entries in order for the snmpd to report those. You will also
need to allow access for your nagios server. Quick, dirty, unsafe:
# /etc/snmp/snmpd.conf
rocommunity public 192.168.1.3 # nagios server IP
syslocation Somewhere
syscontact Me
disk / 10000
disk /var 55
load 5 5 5
4) From the nagios server (which has snmp installed, right?), test the
above with:
snmpwalk -m ALL -v 1 -c public myserver.mydomain.com laLoad.1
For your unix servers, you'll want:
laLoad.1 # Load now
laLoad.2 # Load over 5m
laLoad.3 # Load over 15m
dskPercent.1 # Percent used of first disk in snmpd.conf
dskPercent.2 # Percent used of second disk in snmpd.conf
5) The checkcommands.cfg that comes with nagios already has a
check_snmp command built in. So, you can go ahead and make a service
definition using it.
6) Rather than fooling around with Cisco MIBs, I found it simpler to
use the numeric OIDs for monitoring cisco gear. These should get you
started.
ether0 traffic in bits/sec .1.3.6.1.4.1.9.2.2.1.1.6.1
serial0 traffic in bits/sec .1.3.6.1.4.1.9.2.2.1.1.6.2
serial1 traffic in bits/sec .1.3.6.1.4.1.9.2.2.1.1.6.3
ether0 traffic out bits/sec .1.3.6.1.4.1.9.2.2.1.1.8.1
serial0 traffic out bits/sec .1.3.6.1.4.1.9.2.2.1.1.8.2
serial1 traffic out bits/sec .1.3.6.1.4.1.9.2.2.1.1.8.3
ether0 traffic in pkts/sec .1.3.6.1.4.1.9.2.2.1.1.7.1
serial0 traffic in pkts/sec .1.3.6.1.4.1.9.2.2.1.1.7.2
serial1 traffic in pkts/sec .1.3.6.1.4.1.9.2.2.1.1.7.3
ether0 traffic out pkts/sec .1.3.6.1.4.1.9.2.2.1.1.9.1
serial0 traffic out pkts/sec .1.3.6.1.4.1.9.2.2.1.1.9.2
serial1 traffic out pkts/sec .1.3.6.1.4.1.9.2.2.1.1.9.3
avgBusy0 CPU-load sampled over 5s .1.3.6.1.4.1.9.2.1.56.0
avgBusy1 CPU-load sampled over 1m .1.3.6.1.4.1.9.2.1.57.0
avgBusy5 CPU-load sampled over 5m .1.3.6.1.4.1.9.2.1.58.0
> monitoring), looking for bottle-necks and telco line errors and such.
From
> what I have read, snmp is the way to go so any suggestions would be most
> helpful.
The cisco gear has all kinds of interesting snmp capabilities (e.g.,
copying configs). In order to go further, you may need to install
the cisco mibs. http://www.mibdepot.com is a good place to start.
Cisco's official mib download site is:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
> -----------------------------------
> Vernon A. Fort (Andy)
> Provident Solutions, LLC
> (615) 427-4016 http://www.provident-solutions.com
>
>
> ------=_NextPart_000_0094_01C2BE1A.B8BA27F0
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> name="winmail.dat"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment;
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winmail.dat
yuck.
Kelly
--
Kelly Setzer, System Administrator/Architect - Placemark Investments
14180 Dallas Pkwy, Suite 200, Dallas, TX 75240
kelly.setzer at placemark.com http://www.placemark.com
(972)404-8100x41 (work) (214) 287-3464 (cell)
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