[Babel-users] IPv4 autoconfiguration

[Juliusz Chroboczek]

> This works perfectly well, thank you. Last question:
> what is an "operationnal interface"? Babel warns me that it can't find
> any at startup.

It means two things.  First, that you're using the very last (and
possibly buggy) version of Babel.  And second, that you're starting
Babel before you up any of your interfaces.

The latest versions of Babel check every 30 seconds whether the
interfaces you gave it exist and whether they are up or down.  This
means that you should in principle be able to start Babel very early,
and have it automatically detect interfaces that become available
later in the boot process (for example because they were created by
OpenVPN).

The downside of that is that if you make a typo such as

  babel ::dead:beef etl0

instead of eth0, Babel will accept to run, and wait forever for an
etl0 interface to be created.  Because of that, it will warn you if
none of the interfaces you passed on the command line are usable.

                                        Juliusz