Which logical interface is able to forward IP traffic?

The ability of logical interfaces to forward IP traffic in a Junos device is contingent on their configuration, typically involving proper assignment to a routing instance or their association with a Layer 2 or Layer 3 interface.

In this context, Ge-0/0/2.0 is a logical interface that is designated for IP traffic forwarding, which means it is configured to handle IP packets. This may involve it being part of the network's Layer 3 configuration, allowing it to participate in routing. Ge-0/0/2.0 being set up this way enables it to route traffic based on IP addresses, making it integral for devices that must manage and forward IP packets between different networks or subnets.

The other logical interfaces may not necessarily be configured for Layer 3 operation or IP forwarding in the same context, meaning they might serve different functions or belong to another type of configuration that does not involve direct IP traffic handling. Thus, understanding the specific configurations and the intended use of these interfaces is vital in identifying which one can effectively manage and forward IP traffic in a networking environment.