Monitoring with Nagios, SNMP

Hello all,

I try to add our new FortiGate 200D to our monitoring. Unfortunately I got some confusing output when I did a "snmpwalk" to the firewall. Normally the physical ports 9,10, 12,14 and 15 should be "up". But when I do a snmpwalk on the "ifOperStatus" it is

IF-MIB::ifOperStatus.1 = INTEGER: down(2)
IF-MIB::ifOperStatus.2 = INTEGER: down(2)
IF-MIB::ifOperStatus.3 = INTEGER: down(2)
IF-MIB::ifOperStatus.4 = INTEGER: up(1)
IF-MIB::ifOperStatus.5 = INTEGER: up(1)
IF-MIB::ifOperStatus.6 = INTEGER: down(2)
IF-MIB::ifOperStatus.7 = INTEGER: down(2)
IF-MIB::ifOperStatus.8 = INTEGER: up(1)
IF-MIB::ifOperStatus.9 = INTEGER: up(1)
IF-MIB::ifOperStatus.10 = INTEGER: down(2)
IF-MIB::ifOperStatus.11 = INTEGER: down(2)
IF-MIB::ifOperStatus.12 = INTEGER: down(2)
IF-MIB::ifOperStatus.13 = INTEGER: down(2)
IF-MIB::ifOperStatus.14 = INTEGER: down(2)
IF-MIB::ifOperStatus.15 = INTEGER: down(2)
IF-MIB::ifOperStatus.16 = INTEGER: down(2)
IF-MIB::ifOperStatus.17 = INTEGER: down(2)
IF-MIB::ifOperStatus.18 = INTEGER: up(1)
IF-MIB::ifOperStatus.19 = INTEGER: up(1)
IF-MIB::ifOperStatus.21 = INTEGER: up(1)
IF-MIB::ifOperStatus.22 = INTEGER: up(1)
IF-MIB::ifOperStatus.23 = INTEGER: up(1)
IF-MIB::ifOperStatus.25 = INTEGER: up(1)
IF-MIB::ifOperStatus.26 = INTEGER: up(1)
IF-MIB::ifOperStatus.27 = INTEGER: up(1)
IF-MIB::ifOperStatus.28 = INTEGER: up(1)
IF-MIB::ifOperStatus.29 = INTEGER: down(2)

As you can see this does not fit to the actual state of physical ports. And it outputs more ports that are actually on the machine. Does this output include VLANs, VPN tunnels,.. too?

So maybe the OID SNMP number 1.3.6.1.2.1.2.2.1.7 of the FORTINET-FORTIGATE-MIB.mib is not correct? What OID number is correct to look for the state of the physical ports?

EDIT:

So I found the OID (1.3.6.1.2.1.31.1.1.1.18) where the ports are labeled but this doesn't fit the output from ifOperStatus. Can anyone give me a hint?

IF-MIB::ifAlias.1 = STRING:
IF-MIB::ifAlias.2 = STRING:
IF-MIB::ifAlias.3 = STRING:
IF-MIB::ifAlias.4 = STRING: Network name 1
IF-MIB::ifAlias.5 = STRING: Network name 2
IF-MIB::ifAlias.6 = STRING: Network name 3
IF-MIB::ifAlias.7 = STRING:
IF-MIB::ifAlias.8 = STRING: Network name 4
IF-MIB::ifAlias.9 = STRING:
IF-MIB::ifAlias.10 = STRING:
IF-MIB::ifAlias.11 = STRING:
IF-MIB::ifAlias.12 = STRING:
IF-MIB::ifAlias.13 = STRING:
IF-MIB::ifAlias.14 = STRING:
IF-MIB::ifAlias.15 = STRING:
IF-MIB::ifAlias.16 = STRING:
IF-MIB::ifAlias.17 = STRING:
IF-MIB::ifAlias.18 = STRING: Network name 5
IF-MIB::ifAlias.19 = STRING: Network name 6
IF-MIB::ifAlias.21 = STRING:
IF-MIB::ifAlias.22 = STRING:
IF-MIB::ifAlias.23 = STRING:
IF-MIB::ifAlias.25 = STRING:
IF-MIB::ifAlias.26 = STRING:
IF-MIB::ifAlias.27 = STRING:
IF-MIB::ifAlias.28 = STRING:
IF-MIB::ifAlias.29 = STRING:

Picture of the port state on the web interface is attached.