Does anyone know what the RUNNING flag in ifconfig output means? (I don't know that it matters much, but this is on a Solaris 10 box.)

The only thing I've been able to find on it so far is this forum post.

Even assuming that's accurate, I'd greatly appreciate a more technical explanation, as well as instructions on how to change the RUNNING state of an interface.

2 Answers 2


The running state is typically associated with the UP state of the interface, i.e. is the interface turned on, and is there a link over that interface (ip address, etc)

A good way to word it:


     Indicates that the required resources for  an  interface
     are  allocated.  For some interfaces this also indicates
     that the link is up.

One way to change the running state is to stop it, i.e. down the interface.

Full page here

  • This isnt true, on solaris, if you down an interface it wont effect the running state.
    – Sirch
    May 3, 2012 at 13:50

It means there is a network link to a switch, ie its plugged in.

  • The selected answer is incomplete and incorrect without this answer.
    – Seamus
    Sep 6, 2020 at 22:13

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