SNMP: Find out if interface is a trunk

[khuysmans]

Hi,

Does anybody know the OID of a table that tells me whether the interfaces on a switch are configured as trunks?

So I want SNMP to poll the list of interfaces and tell me which are trunks and which are access ports.

Thanks in advance.

regards,

Kevin

[nhabib]

If switch is running CatOS, then you may poll the following object:

vlanPortIslOperStatus (.1.3.6.1.4.1.9.5.1.9.3.1.8)

The response would be: trunking(1) or notTrunking(2)

[khuysmans]

Thanks a lot nhabib, but I am running Cisco IOS on all my switches and the OID you suggest does not work on those.

Does anyone know of an equivalent for IOS?

[kka · Accepted solution]

You could try vlanTrunkPortDynamicStatus from the CISCO-VTP-MIB

(1.3.6.1.4.1.9.9.46.1.6.1.1.14):

CISCO-VTP-MIB::vlanTrunkPortDynamicStatus.47 = notTrunking(2)

CISCO-VTP-MIB::vlanTrunkPortDynamicStatus.48 = notTrunking(2)

CISCO-VTP-MIB::vlanTrunkPortDynamicStatus.49 = trunking(1)

CISCO-VTP-MIB::vlanTrunkPortDynamicStatus.50 = trunking(1)

On older Switches (3524-XL IOS 12.0) there are only rows

for trunk interfaces in the table.

[khuysmans]

Thanks kka, that is exactly what I was looking for!

[medaliesprit]

Hi,

In what place I have to put this MIB in WinSCP?

knowing that Nagios is installed on EyesOfNetwork

/srv/eyesofnetwork/nagios/mibscisco/

What changes do I need in the script of this MIB that will be associated with where nagios is installed on EyesOfNetwork?

Thanks.

regards,

Medali

[Drey Tee]

Both OIDs from other answers give me error: "No Such Object available on this agent at this OID" on my Small Business SF300-24 switch. SO I managed to find proper OID:
1.3.6.1.4.1.9.6.1.101.48.22.1.1
It gives INT 2 for access port and INT 3 for trunk port.