dhcpcd-discuss

On 2016-01-31 12:34, Nick Williams wrote:
> > IPv4 also always static IP assignment, ARP ing profiles and IPv4LL 
> > support - not just dhcp.
> > IPv6 also has RS/RA - not just dhcpv6.
>
> Understood. So “noipv6,” for example, would disable DHCPv6, IPv6RS,
> and IPv6 RA Autoconf. Given that, I think the below configuration
> should effect the narrative following it. Can you confirm that I have
> the right understanding now?
>
> This:
>
> allowinterfaces eth0 eth1
> noipv4
> noipv6
> interface eth0
> ipv4
> interface eth1
> ipv6
> ia_na 1
> ia_pd 2 eth2 eth3 eth4
>
> Does this:
>  - Enable dhcpcd to touch only eth0 and eth1 (except if delegating
> prefixes with PD)
>  - Disables IPv4 / DHCP / ARP / IPv4LL for all interfaces unless
> explicitly enabled
>  - Disables IPv6 / DHCPv6 / IPv6RS / IPv6 RA Autoconf for all
> interfaces unless explicitly enabled
>  - Starts a config for eth0
>  - Re-enables only IPv4 / DHCP / ARP / IPv4LL for eth0
>  - Starts a config for eth1
>  - Re-enables only IPv6 / DHCPv6 / IPv6RS / IPv6 RA Autoconf for eth1
>  - Tells dhcpcd to request a single normal IPv6 address for eth1
>  - Tells dhcpcd to request an appropriately-large prefix on eth1,
> split it up, and delegate /64 prefixes from it to eth2, eth3, and
> eth4.

Yes.
Enabling ipv6 for eth1 should be superfluous as ia_na and ia_pd should 
re-enable it (not tested that though).
Although there is an issue with the latter I think when you delegate >64 
(see my earlier post) - 64 itself should be fine.

Roy