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My check_snmp command doesn´t work for switch monitoring

https://support.nagios.com/forum/viewtopic.php?t=33193

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Re: My check_snmp command doesn´t work for switch monitoring

Posted: Fri Jun 05, 2015 12:25 pm
by Jessuzz94
when i put the command " snmpget -v 2c public 192.168.1.20 .1.3.6.1.2.1.1.3.0" it shows this :

Code: Select all

No community name specified.
USAGE: snmpget [OPTIONS] AGENT OID [OID]...

  Version:  5.7.2
  Web:      http://www.net-snmp.org/
  Email:    [email protected]

OPTIONS:
  -h, --help            display this help message
  -H                    display configuration file directives understood
  -v 1|2c|3             specifies SNMP version to use
  -V, --version         display package version number
SNMP Version 1 or 2c specific
  -c COMMUNITY          set the community string
SNMP Version 3 specific
  -a PROTOCOL           set authentication protocol (MD5|SHA)
  -A PASSPHRASE         set authentication protocol pass phrase
  -e ENGINE-ID          set security engine ID (e.g. 800000020109840301)
  -E ENGINE-ID          set context engine ID (e.g. 800000020109840301)
  -l LEVEL              set security level (noAuthNoPriv|authNoPriv|authPriv)
  -n CONTEXT            set context name (e.g. bridge1)
  -u USER-NAME          set security name (e.g. bert)
  -x PROTOCOL           set privacy protocol (DES|AES)
  -X PASSPHRASE         set privacy protocol pass phrase
  -Z BOOTS,TIME         set destination engine boots/time
General communication options
  -r RETRIES            set the number of retries
  -t TIMEOUT            set the request timeout (in seconds)
Debugging
  -d                    dump input/output packets in hexadecimal
  -D[TOKEN[,...]]       turn on debugging output for the specified TOKENs
                           (ALL gives extremely verbose debugging output)
General options
  -m MIB[:...]          load given list of MIBs (ALL loads everything)
  -M DIR[:...]          look in given list of directories for MIBs
    (default: /home/c4sonora/.snmp/mibs:/usr/share/snmp/mibs:/usr/share/snmp/mib                                                                                        s/iana:/usr/share/snmp/mibs/ietf:/usr/share/mibs/site:/usr/share/snmp/mibs:/usr/                                                                                        share/mibs/iana:/usr/share/mibs/ietf:/usr/share/mibs/netsnmp)
  -P MIBOPTS            Toggle various defaults controlling MIB parsing:
                          u:  allow the use of underlines in MIB symbols
                          c:  disallow the use of "--" to terminate comments
                          d:  save the DESCRIPTIONs of the MIB objects
                          e:  disable errors when MIB symbols conflict
                          w:  enable warnings when MIB symbols conflict
                          W:  enable detailed warnings when MIB symbols conflict
                          R:  replace MIB symbols from latest module
  -O OUTOPTS            Toggle various defaults controlling output display:
                          0:  print leading 0 for single-digit hex characters
                          a:  print all strings in ascii format
                          b:  do not break OID indexes down
                          e:  print enums numerically
                          E:  escape quotes in string indices
                          f:  print full OIDs on output
                          n:  print OIDs numerically
                          q:  quick print for easier parsing
                          Q:  quick print with equal-signs
                          s:  print only last symbolic element of OID
                          S:  print MIB module-id plus last element
                          t:  print timeticks unparsed as numeric integers
                          T:  print human-readable text along with hex strings
                          u:  print OIDs using UCD-style prefix suppression
                          U:  don't print units
                          v:  print values only (not OID = value)
                          x:  print all strings in hex format
                          X:  extended index format
  -I INOPTS             Toggle various defaults controlling input parsing:
                          b:  do best/regex matching to find a MIB node
                          h:  don't apply DISPLAY-HINTs
                          r:  do not check values for range/type legality
                          R:  do random access to OID labels
                          u:  top-level OIDs must have '.' prefix (UCD-style)
                          s SUFFIX:  Append all textual OIDs with SUFFIX before                                                                                         parsing
                          S PREFIX:  Prepend all textual OIDs with PREFIX before                                                                                         parsing
  -L LOGOPTS            Toggle various defaults controlling logging:
                          e:           log to standard error
                          o:           log to standard output
                          n:           don't log at all
                          f file:      log to the specified file
                          s facility:  log to syslog (via the specified facility     
...

...
...
...                                                                                   )



when i put the command "ll /usr/share/snmp/mibs" it shows this :

Code: Select all

total 296
drwxr-xr-x 2 root     root      4096 Jun  5 09:23 ./
drwxr-xr-x 5 root     root      4096 Jun  4 11:10 ../
-rw-rw-r-- 1 c4sonora c4sonora 68104 May 26  2011 DISMAN-EVENT-MIB.txt
-rw-r--r-- 1 root     root      1913 Apr  8  2014 GNOME-SMI.txt
-rw-r--r-- 1 root     root      5931 Oct  9  2012 LM-SENSORS-MIB.txt
-rw-r--r-- 1 root     root     15901 Oct  9  2012 NET-SNMP-AGENT-MIB.txt
-rw-r--r-- 1 root     root      9160 Oct  9  2012 NET-SNMP-EXAMPLES-MIB.txt
-rw-r--r-- 1 root     root      9326 Oct  9  2012 NET-SNMP-EXTEND-MIB.txt
-rw-r--r-- 1 root     root      2036 Oct  9  2012 NET-SNMP-MIB.txt
-rw-r--r-- 1 root     root      1215 Oct  9  2012 NET-SNMP-MONITOR-MIB.txt
-rw-r--r-- 1 root     root      3350 Oct  9  2012 NET-SNMP-PASS-MIB.txt
-rw-r--r-- 1 root     root      2504 Oct  9  2012 NET-SNMP-PERIODIC-NOTIFY-MIB.t                                                                                        xt
-rw-r--r-- 1 root     root      1226 Oct  9  2012 NET-SNMP-SYSTEM-MIB.txt
-rw-r--r-- 1 root     root      4814 Oct  9  2012 NET-SNMP-TC.txt
-rw-r--r-- 1 root     root      5039 Oct  9  2012 NET-SNMP-VACM-MIB.txt
-rw-rw-r-- 1 c4sonora c4sonora 14565 Jun  4 12:37 SNMPv2-MIB-V1SMI.my
-rw-r--r-- 1 root     root     14565 Jun  4 13:02 SNMPv2-MIB-V1SMI.txt
-rw-r--r-- 1 root     root      2163 Oct  9  2012 UCD-DEMO-MIB.txt
-rw-r--r-- 1 root     root      4613 Oct  9  2012 UCD-DISKIO-MIB.txt
-rw-r--r-- 1 root     root      3087 Oct  9  2012 UCD-DLMOD-MIB.txt
-rw-r--r-- 1 root     root      6476 Oct  9  2012 UCD-IPFILTER-MIB.txt
-rw-r--r-- 1 root     root      8118 Oct  9  2012 UCD-IPFWACC-MIB.txt
-rw-r--r-- 1 root     root     18274 Oct  9  2012 UCD-SNMP-MIB-OLD.txt
-rw-r--r-- 1 root     root     48890 Oct  9  2012 UCD-SNMP-MIB.txt

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Fri Jun 05, 2015 1:57 pm
by Jessuzz94
Now this appears in my nagios web interface

what means the mesagge "External command error: Unknown flag passed to -C: s "?

Port 5 Status
UNKNOWN 06-05-2015 11:48:37 2d 0h 46m 48s 1/1 External command error: Unknown flag passed to -C: i

Uptime
UNKNOWN 06-05-2015 11:50:26 0d 0h 4m 16s 1/1 External command error: Unknown flag passed to -C: s

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Fri Jun 05, 2015 2:12 pm
by jdalrymple
If fixing the MIB problem isn't of interest to you, you can just change your original service to read:

Code: Select all

define service{
     use generic-service
     host_name switchcisco
     service_description Uptime
     check_command check_snmp!-C public -o .1.3.6.1.2.1.1.3.0
}

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Fri Jun 05, 2015 2:36 pm
by Jessuzz94
these numbers is the direct calling of the mibs or the service in specific?, i have this in my switch.cfg

define service{
check_command check_snmp!.1.3.6.1.2.1.1.4.0
}

and it works and says Uptime OK: testcontact, i dont know what means with the "testcontact" but works

but yes i interesting to resolve the problems of the MIBS, because other monitoring services like the ports tatus have include MIBS in the check_command

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Fri Jun 05, 2015 2:39 pm
by Jessuzz94
now i commented the "mibs: " line in /etc/snmp/snmp.conf" and downloaded the snmp-mibs-downloader. and the command

"snmpget -v 2c <CiscoIP> -c public sysUpTimeInstance" works, but still have problems with mibs to monitor uptime or portstatus

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Mon Jun 08, 2015 9:09 am
by jdalrymple
Jessuzz94 wrote:define service{
check_command check_snmp!.1.3.6.1.2.1.1.4.0
}

and it works and says Uptime OK: testcontact, i dont know what means with the "testcontact" but works
.1.3.6.1.2.1.1.4.0 isn't uptime, it's system contact


Jessuzz94 wrote:but still have problems with mibs to monitor uptime or portstatus
Can you be more specific?

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Mon Jun 08, 2015 11:02 am
by Jessuzz94
In the nagios web interface, in the switch monitoring i have 3 services, PING, Port 1 Status and Uptime, the port status and uptime i have UNKNOWN, and the descriptions says :

Port 1 Status | UNKNOWN | External command error: Unknown flag passed to -C: i
Uptime | UNKNOWN | External command error: Unknown flag passed to -C: s

what is the problem?

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Mon Jun 08, 2015 11:29 am
by jdalrymple
If your service definition hasn't changed, then your command definition must have. Something is wrong.

Show us the command definition for check_snmp.

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Mon Jun 08, 2015 12:31 pm
by Jessuzz94
in commands.cfg my check_snmp command is:

command_name: check_snmp
command_line: $USER1$/check_snmp -H $HOSTADDRESS$ -C public -o $ARG1$ $ARG2$ $ARG3$

in mi switch.cfg:

define service{
use generic-service
host_name switchcisco
service_decription Uptime
check_command check_snmp!-C public -o sysUpTime.0
}

define service{
use generic-service
host_name switchcisco
service_description Port 1 Status
check_command check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB
}

Re: My check_snmp command doesn´t work for switch monitoring

Posted: Mon Jun 08, 2015 1:36 pm
by jdalrymple
Jessuzz94 wrote:command_name: check_snmp
command_line: $USER1$/check_snmp -H $HOSTADDRESS$ -C public -o $ARG1$ $ARG2$ $ARG3$
So then services should be:

Code: Select all

define service{
 use generic-service
 host_name switchcisco
 service_decription Uptime
 check_command check_snmp!sysUpTime.0
 }

define service{
 use generic-service
 host_name switchcisco
 service_description Port 1 Status
 check_command check_snmp!ifOperStatus.1
 }
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