A.set interfaces fe-0/0/0 address 10.1.1.1/24 B.set interfaces fe-0/0/0.0 family inet address 10.1.1.1/24 C.set interfaces fe-0/0/0.0 address 10.1.1.1/24 D.set interfaces fe-0/0/0 unit 0 family inet address 10.1.1.1/24
A.Units in JUNOS are always required for any interface configured with logical addresses such as IP and IPv6. B.Units in JUNOS are only required when you are configuring sub-interfaces for inter-VLAN routing. C.Unit numbers must match the DLCI or VCI numbers configured on the interface. D.Unit 0 is the only value allowed on interfaces running HDLC, PPP, or for Ethernet interfaces not doing VLAN-tagging.
A.set interfaces fe-0/0/0 unit 0 ethernet-options mtu 1200 B.set interfaces fe-0/0/0 mtu 1200 C.set interfaces fe-0/0/0 unit 0 mtu 1200 D.set interfaces fe-0/0/0.0 mtu 1200