Monitoring switches via SNMP --

[Mike Saldivar]

On Thu, May 7, 2009 at 5:15 PM, Mike Saldivar <
mike.saldivar at advocatecreditrepair.com> wrote:

> Hi there,
>
> I have a new installation of Nagios, Version 3.0.6, running on Ubuntu
> 8.10.  I followed the Quick Start guide for Ubuntu, and everything went
> swimmingly, installing Nagios, the Plug-ins, Apache, et al.  Nagios started
> up and monitored itself, and following the quick-starts for Linux and
> Windows, I've been able to get it to monitor all my hosts.
>
> So I'm now trying to get it to monitor a Cisco ASA 5510 VPN.  On the ASA, I
> enabled SNMP, and pointed it to the Nagios machine for reporting.
>
> On the Nagios box, I copied up the switch.cfg, changed the IP address and
> hostname, etc, following the instructions:
> http://nagios.sourceforge.net/docs/3_0/monitoring-routers.html
>
> Restarting, I see these errors such as this.  Posting the error, then the
> corresponding portion of the switch.cfg:
>
> Inside Interface   CRITICAL     05-07-2009 16:54:07     0d 2h 53m 31s
> 3/3     (Return code of 127 is out of bounds - plugin may be missing)
>


Ah ha, I've discovered that check_snmp was not installed with the rest of
the Nagios plugins.  Apparently, if net-snmp and net-snmp-utils are not
already installed, the plugins installer skips installing that plugin.

Here's a configure of check_snmp 1.4, freshly downloaded from Nagios
Exchange:

root at dfslit1:~/check_snmp-1.4# ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking whether gcc and cc understand -c and -o together... yes
checking for net-snmp-config... /usr/bin/net-snmp-config
checking for init_snmp in -lnetsnmp... no
configure: error: snmp library not found

I looked through the Ubuntu package website, and tried installing any
package I could find that's related to SNMP, but already have them all
installed.

snmp is already the newest version.
libsnmp-base is already the newest version.
libsnmp15 is already the newest version.
snmpd is already the newest version.
libsnmp-perl is already the newest version.

Is there an inherent incompatibility between Ubuntu 8.10 and the check_snmp
plugin?  Do I need to go the all Perl/CPAN route?  I can perform snmpwalks,
but I don't know of any other way to find out what I'm missing.

nagios at dfslit1:~$ snmpwalk -v1 -c public 10.5.1.2 system
SNMPv2-MIB::sysDescr.0 = STRING: Cisco Adaptive Security Appliance Version
7.0(4)
SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.1.669
[...]

Thanks,
-Mike
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