check_snmp critical but interface displayed status is ok

[amerikarno]

Used check_snmp to monitor firewall interface.

by running check_snmp command it's seem to be ok as below

# ./libexec/check_snmp --hostname=192.168.170.1 --community=public --oid=ifOperStatus.2 -m IF-MIB -s 'up(1)'
SNMP OK - up(1) |
# ./libexec/check_snmp --hostname=192.168.170.1 --community=public --oid=ifOperStatus.3 -m IF-MIB -s 'up(1)'
SNMP CRITICAL - *down(2)* |

but on web interface the status of wan2 is wrong as attach