Re: [PATCH] [IPV4]: Exclude "All deletion of equal addresses only differing by prefix length."

[Thomas Graf <tgraf@xxxxxxx>]

* Pekka Savola <Pine.LNX.4.61.0503312047110.26294@xxxxxxxxxx> 2005-03-31 20:48
> On Thu, 31 Mar 2005, Thomas Graf wrote:
> >The address deletion fix is no longer needed since a better fix
> >has made it into iproute2. Better in terms of same hack but in
> >userspace so we don't confuse other netlink users.
> 
> So, does that mean that all the users are expected to always run the 
> latest iproute2, so there's no need for backward-compat in the kernel?

The actual challenge in this rather trivial problem is that many scripts
rely on this wrong behaviour by doing ip a a 1.1.1.1/24 dev lo;
ip a d 1.1.1.1 dev lo; and nobody wants to break them. So even with the
kernel fix we had, old iproute2 versions still did it wrong but it gave
newer iproute2 versions a chance to work around the issue.