The interface is connected to a switch and has the no shutdown command applied. The interface at the switch is already up/up, but ASA's interface is still down/down. Another ASA also has the same behavior. What is the reason for this?

  • 1
    Have you replaced the cable?
    – Ron Trunk
    Commented Oct 20, 2015 at 1:20
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide your own answer and accept it.
    – Ron Maupin
    Commented Aug 6, 2017 at 23:39

2 Answers 2


You need to assign name for the interface, like below example : Configure t Interface gigaethernet 0/0 Name inside Security-level 100


Configure below commands in the Interface that you want to bring up

nameif inside

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