[Solved] How to modify internal dhcp ( IPv6 to IPv4 ) ??

[newpublic]

How to modify internal dhcp to IPv4 ??

I want to simulate a IPv4 internal environment, but vbox's internal dhcp is IPv6 default ......
And in the VirtualBox Menu, File --> Prefernces --> Network --> ...... Only "Host-only Networks ", no "Internal Networks" ......
Can't modify internal dhcp to IPv4 ???

[newpublic]

OK
I got it

1? append a dhcp server ( ip v4 )
2? internal netname --> created just now

[Sasquatch]

VB does not provide a direct IPv6 DHCP, unless you specify a range manually, just like IPv4. Your interfaces get a default Link-Local address, that starts with fe80. Check http://en.wikipedia.org/wiki/IPv6 for more IPv6 info.

[newpublic]

boot with internal 's default intnet
then the default ip is ipv6
and ping6 with each other is alive

Isn't it ip v6 default ???

[Sasquatch]

No, it's not. IPv6 is only available because you have the proper modules loaded on the systems. If you blacklist the IPv6 module, you don't have IPv6 connectivity. And like I said, check that Wikipedia link. Every NIC gets a Link-Local address. It's perfectly normal and has nothing to do with VB. Sure you can ping6 both systems, because they are connected to each other, in the same way a normal ping4 would work if the NICs have an IPv4 address on them.

Now, what do you not understand about this? VB does NOTHING with the Link-Local addresses, the OS itself does it all.