dhcpcd-discuss

On 15/03/2018 02:32, jobhunts02@xxxxxxx wrote:
> I have an interface enabled for both DHCPv4 & DHCPv6.  If I change the 
> DHCPv6 pool on the server and then kill/restart dhcpcd, should I get an 
> IPv6 address from the new pool like I do for IPv4 or should I keep my 
> same IPv6 address?
>
> For example, I initially have these addresses assigned by DHCP on my client:
> 192.168.2.180
> 2001:ed8:77b5:0:10:123:105:188/64
> Both of these addresses are from the corresponding pool on the server.
>
> I go to the server and change the IPv4 & IPv6 pools to:
> 192.168.2.130 to 192.168.2.139
> 2001:ed8:77b5:0:10:123:105:130 to 2001:ed8:77b5:0:10:123:105:139
> The addresses on the client remain the same.
>
> Then, I kill/restart dhcpcd on the client.  Now the respective addresses 
> are:
> 192.168.2.130
> 2001:ed8:77b5:0:10:123:105:188/64
>
> Should my IPv6 address have changed to something within 
> 2001:ed8:77b5:0:10:123:105:130 to 2001:ed8:77b5:0:10:123:105:139?

You should have both 2001:ed8:77b5:0:10:123:105:188/64 and an address 
within 2001:ed8:77b5:0:10:123:105:130 to 2001:ed8:77b5:0:10:123:105:139.
The first address is still valid and there is no real way of 
invalidating it from DHCP6 other than setting it's vltime and pltime to 
0 at the server which is quite complicated.

The idea is that the address will expire by itself, unlike an IPv4 address.

Roy