Monitoring switches via SNMP --

[Andrew Davis]

You're more likely to get a good response by emailing the entire list 
than you are by emailing me directly...

  A. Davis

Mike Saldivar 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)
>
> ---
> define service{
>         use                     generic-service ; Inherit values from 
> a template
>         host_name               CCLogan-ASA5510-1
>         service_description     Inside Interface
>         check_command           check_snmp!-C public -o 
> ifOperStatus.INSIDE -r 1 -m RFC1213-MIB
>         }
> ---
>
> I changed ifOperStatus.INSIDE from ifOperStatus.1 because an snmpwalk 
> on the device said that's what this port name was, but I can change it 
> back.  But googling the error (Return code of 127 ...) seems to 
> indicate I'm missing net-snmp or net-snmp-util, but I'm not sure how 
> to install them -- can't do a rpm -qa on Ubuntu, and I don't know what 
> the corresponding command is with apt-get.  But searching the Ubuntu 
> repositories, I can' find an equivalent to net-snmp-util, so I think 
> that's the problem.  Snmpwalk works though, so I figure I have 
> something half-working...
>
>
> The other error I see is:
>
> ---
> Port 1 Bandwidth UNKNOWN     05-07-2009 17:02:24     0d 2h 38m 14s     
> 3/3     check_mrtgtraf: Unable to open MRTG log file
>
> ---
> define service{
>         use                     generic-service ; Inherit values from 
> a template
>         host_name               CCLogan-ASA5510-1
>         service_description     Port 1 Bandwidth
>         check_command           
> check_local_mrtgtraf!/var/lib/mrtg/10.5.1.2_1.log!AVG!1000000,1000000!5000000,5000000!10
>         }
> ---
>
> I looked, and /var/lib/mrtg/ didn't exist.  Googling, I saw a tip to 
> change it to /var/www/mrtg/, but that directory didn't exist either.  
> I created /var/lib/mrtg/ and chown'd it to nagios:nagios and restarted 
> Nagios, but still nothing.  Is there a mrtg config file I need to edit?
>
> Should I check into check_cisco.pl, or does that work better for the 
> huge switches than the itty-bitty 4-porters?
>
> Thanks a heap,
> -Mike
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