Re: [v6ops] Please review the No IPv4 draft

["Dale W. Carder" <[e-mail]>]

Thus spake Simon Perreault ([e-mail]) on Mon, Apr 14, 2014 at 10:50:13AM -0400:
> Dearest V6OPS,
> 
> We are soliciting reviews for this SUNSET4 draft:
> 
> http://tools.ietf.org/html/draft-ietf-sunset4-noipv4-00
> 
> In a nutshell, it defines DHCPv6 and RA options indicating to the host
> that IPv4 is not available. Reviews from operations-minded people in
> V6OPS would be of tremendous help.

I guess I am still confused by your use cases.  In looking at our dhcpv4 
servers, I don't have No-IPX nor No-AppleTalk options sent to clients,
so I am confused why this is needed for IPv4.

3.1:  Turn off the dhcpv4 relay feature per router (sub)interface.  No more 
load on the dhcpv4 server.

3.2:  At the edge of your network, filter packets containing ethertypes you 
do not support.  

3.3:  Mobile device vendors have an incentive in fixing their code so
they do not chew up their battery more than their competitors.

3.4:  At the edge of your network, filter packets containing ethertypes you 
do not support.

I think I understand 5.3 however I think you made a much better argument for 
turning off dhcp relay and ethertype filtering.  The v4-level just says
where the filter would best be configured.

Since not every host would understand the No_IPv4 option, you are probably 
just going to have to filter in your network anyway if Section 3 is truly 
a problem.

Dale