Monitoring a Cisco 2960G switch with Nagios

I am monitoring a Cisco 2960G switch with Nagios. I am getting green (OK) for ping, port 1 link status and uptime. Port 3 link status is orange with the error: SNMP problem  No data received from host. If I unplug the network cable in port 1 on the switch the port stays green in Nagios so it is not monitoring port 1.  The switch has an IP address on the vlan and SNMP is enabled read only. What do I have configured wrong?
define host{
	use		generic-switch		; Inherit default values from a template
	host_name	switch			; The name we're giving to this switch
	alias		Cisco Switch		; A longer name associated with the switch
	address		10.100.10.8		; IP address of the switch
	hostgroups	switches		; Host groups this switch is associated with
 
	}
 
define hostgroup{
	hostgroup_name		switches
	alias			Network Switches
	members			netware1,netware2,netware3,netware4
	}
 
 
define service{
 
	use			generic-service	; Inherit values from a template
	host_name		switch		; The name of the host the service is associated with
	service_description	PING		; The service description
	check_command		check_ping!200.0,20%!600.0,60%	; 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
 
	}
 
 
define service{
 
	use			generic-service	; Inherit values from a template
	host_name		switch
	service_description	Uptime	
	check_command		check_snmp!-C public -o sysUpTime.0
 
	}
 
 
define service{
 
	use			generic-service	; Inherit values from a template
	host_name		switch
	service_description	Port 1 Link Status
	check_command		check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB
 
	}
 
define service{
 
	use			generic-service	; Inherit values from a template
	host_name		switch
	service_description	Port 2 Link Status
	check_command		check_snmp!-C public -o ifOperStatus.2 -r 1 -m RFC1213-MIB
 
	}

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CAKNVAsked:
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CAKNVAuthor Commented:
Used snmpwalk to find out correct interface. Command should be ifOperStatus.10101, ifOperStatus.10102, ifOperStatus.10103.
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