Service Definition

[Dei Bertine]

Hi all, 
Hoping someone can give me guidance on this.
I'm trying to set-up monitoring on our routers in which I already followed this doc:
http://nagios.sourceforge.net/docs/3_0/monitoring-routers.html
I'm doing snmp at this point and trying to define the service to my hosts then I get this error when verifying:
Error: Service check command 'check_snmp' specified in service 'PING-NET' for host 'cisco-router' not defined anywhere!

Here's a sample of my cfg: 
define service{
        use                             local-service           ; Inherit values from a template
        host_name                       cisco-router             ; The name of the host the service is associated with
        service_description             PING-NET             ; The service description
        check_command                   check_snmp!-C public -o sysUpTime.0  ; The command used to monitor the service
        normal_check_interval           5                       ; Check the service every 5 minutes under normal conditions
        retry_check_interval            1                       ; Re-check the service every minute until its final/hard state is determined
        }

Any ideas?
Need expert advise please. 
Thank you! 



      
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