I don't follow the question.
Loopbacks are a virtual interface inside the SRX.
ge-0/0/x are the physical interfaces on the SRX
There is not such thing as a loopback at the physical interface level.
Are you trying to have ip addresses on a trunk port maybe with multiple vlans then each with a gateway ip address on sub interfaces of the same physical port?
I cannot use this functionality. But I want to do this at a different level.
interfaces -> ge-0/0/x -> gigether-options -> loopback
Simply adding an address somewhere is possible. I cannot. At the interface level.
Should i filter a netmask, what?
Thanks for the clarification.
gigether-options -> loopback is not an interface but a test mode.
The only option here is to have the loopback on or removed.
This is a software version of a physical loopback connector plugged into the physical port. the input is looped to the output of the port.
This is used when the port is the target of a test device on another port or the other end of a service to send traffic generated by a test set back to the test set to validate the configuration.
The logical unit numbers are limited to these ranges:
You can include this statement at the following hierarchy levels:
[edit interfaces interface-name]
[edit logical-systems logical-system-name interfaces interface-name]
The logical unit number can be in the range 0 through 65,535 for demux and PPPoE static interfaces only. The logical unit number can be in the range 0 through 16,385 for all other static interface types.
They are only a label and can be selected within that range via any naming convention you want. A typical one is to name the unit the same as the vlan id of the traffic for a trunk port and to use zero if only one connection is on the port.