On Fri, Feb 09, 2007 at 01:49:08PM -0800, Jeremy Chadwick wrote: > On Fri, Feb 09, 2007 at 04:06:56PM -0500, Kevin Way wrote: > > I recently ran into a bug in the jail startup scripts that caused this > > command to be executed: > > > > ifconfig bce0 -alias > > > > It turns out that this command eliminated the primary IP for the device. > > > > man ifconfig defines the behavior of -alias to be: > > > > -alias Remove the network address specified. This would be used > > if you > > incorrectly specified an alias, or it was no longer needed. If > > you have incorrectly set an NS address having the side > > effect of > > specifying the host portion, removing all NS addresses will > > allow > > you to respecify the host portion. > > > > > > I can't help but wonder if it would be better behavior to throw an error > > when no > > argument is supplied. > > > > The only discussion I found of this in a quick search of the archives > > was a post in > > 2004 which noted that the fxp driver actually deletes all IP addresses, > > but there was > > no significant follow-up. > > > > Should ifconfig throw an error if no address is supplied? > > My vote is for either 1) an error, or 2) delete all of the aliases > associated with that interface. If I had a preference, I'd choose #1. > > I'd argue that -alias doing what you described (removing the non-aliased > IP bound to the iface) when no inet/inet6 arguments are suppied is > indeed a bug.
It's way to late to make this change. This is known behavior and has been for ages. If there's a bug it's in the documentation. -- Brooks
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