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Re: [netcf-devel] [libvirt] [RFC] Reporting host interface status/statistics via netcf/libvirt, and listing active vs. inactive interfaces



On Thu, Jun 18, 2009 at 10:56:44PM +0000, David Lutterkort wrote:
> On Thu, 2009-06-18 at 18:10 +0100, Daniel P. Berrange wrote:
> > > I don't see that that buys us anything that we wouldn't have with
> > > 
> > >         <ip type='ipv4' address='122.0.0.3' prefix='24'/>
> > >         <ip type='ipv4' address='24.24.224.4' prefix='24'/>
> > >         <ip type='ipv6' address='2001:23::2' prefix='48'/>
> > >         <ip type='ipv6' address='fe:33:55::33' prefix='64'/>
> > >         <ipx address='2423.4521.66.3.252.'/>
> > 
> > If you do this, then you'll need an explicit element to turn on / off
> > IPv4 or IPv6 addressing for the inteface as whole. ie to stop the
> > automatic addition of a link-local address.
> 
> That should be stated explicitly, not implied by having an empty
> <address/> tag.

IMHO that results in a bad structure, because its anot associating
the related info together, eg having an separate element to turn
on/off IPV6, and then listing addresses:

   <address family='ipv6'/>
   <ip type='ipv6' address='2001:23::2' prefix='48'/>
   <ip type='ipv6' address='fe:33:55::33' prefix='64'/>

vs having the direct association

   <address family='ipv6'>
      <ip address='2001:23::2' prefix='48'/>
      <ip address='fe:33:55::33' prefix='64'/>
   </address>

the latter removes the redundancy from specifying address family in
multiple places

> > By having the container, for each family, the prescense or not of the
> > container can define whether that address family is enabled for that
> > inteface. 
> 
> What would 'enabling an address family for an interface' do ? Whatever
> it does should probably be stated explicitly.

That's really protocol specific, but it will typically enable some local
address auto-config by the kernel.

Daniel
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