[Observium] Alert check on custom IOD / Customers and L2TP

Hello,

Observium is a great tool and I'm still getting my hands on it.

I've encountered the following issues and hope somebody can help me :

1) I'm trying to do an alert check on custom IOD but haven't found how to specify this in the check conditions. Is there's any way to do this ?

2) I activate the Customers and L2TP in the config.php file and I'm trying to make it work. Do you have any more informations about how to configure my equipments ? I manage to configure Transit by specifying "transit" on the port and it works great. A colleague of mine told me that there used to be a wiki page about this before but it seems it's not online anymore.

Thank you for taking the time to help me.