[Linux-ha-dev] problem shutting down first created aliasinterfaces on linux

[Dejan Muhamedagic]

Hi,

On Fri, Jan 11, 2008 at 04:56:46PM +0100, Sebastian Reitenbach wrote:
> Dejan Muhamedagic <dejanmm at fastmail.fm> wrote: 
> > Hi,
> > 
> > On Fri, Jan 11, 2008 at 01:39:28PM +0100, Sebastian Reitenbach wrote:
> > > Hi,
> > > 
> > > I stumbled across a strange behavior of ifconfig/ip, regarding alias IP 
> > > addresses on linux. I found this behaviour on suse 10.1, 10.2, 10.3 and 
> > > SLES10SP1.
> > > 
> > > When you configure multiple aliases on an single interface, and you 
> specify 
> > > netmasks and broadcasts, and then try to shutdown just the first created 
> > > alias then all IP aliases for that interface will be gone. Removing one 
> of 
> > > the later created aliases works as expected.
> > > 
> > > As I think virtual IP aliases are used often in HA environments, it 
> might be 
> > > of interest to you. 
> > > 
> > > here is more information:
> > > https://bugzilla.novell.com/show_bug.cgi?id=352841
> > 
> > A strange and frightening bug. I wonder how it went unnoticed
> > this long.
> yeah, me too. I uploaded a testscript to the bugreport, You can test whether 
> it happens to you too. at least I have it seen on any suse version I have 
> around here... 

It does on the openSUSE 10.3 as well as on Debian Etch. But, as
Lars pointed out, only if a new netmask is defined.

BTW, looking a bit around, it seems like there were similar
problems in the past.

Thanks,

Dejan

> 
> > 
> > Thanks for the info.
> no problem.
> 
> Sebastian
> 
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