Re: [PATCH] Add ip route {save,restore}

[Stephen Hemminger <shemminger@vyatta.com>]

On Fri, 21 May 2010 09:45:11 -0700
Dan Smith <danms@us.ibm.com> wrote:

> This patch adds save and restore commands to "ip route". Save dumps
> the RTNL stream to stdout which can then be passed to restore later.
> This may be helpful in some normal situations, and will allow C/R to
> migrate the routing information in userspace.  Tweaking of the stream
> can be done by userspace helpers to convert between versions and adjust
> things like device indexes when restoring routes in a different
> environment.
> 
> By factoring out some of the common bits of print_route() into
> filter_nlmsg(), the "save" command can use the same selection logic
> as "list," allowing the caller to save only specific routes as
> necessary.
> 
> The only change since the RFC is the addition of manpage and doc
> material.
> 
> Signed-off-by: Dan Smith <danms@us.ibm.com>

I think Jamal/Alexey original intent was that output of show
command could be piped back in, allowing the same kind of
save/restore without special format.

But probably over the intervening time, the output format diverged
and that isn't possible.