IPv6 support with busybox

[David Laight]

I’d check that the script that udhcpc6 runs to configure IPv6 is actually doing something sensible.
Especially if you are also trying to use IPv4 as well.

You’ll need a network that is running (IIRC) radv – otherwise you won’t get a prefix length (aka netmask) or any routes.
So if IPv6 ‘autoconf’ (SLAAS) won’t give you a valid IPv6 config then neither will dhcpc6.

                David

From: busybox <busybox-bounces at busybox.net> On Behalf Of Vijay Khurdiya
Sent: 19 April 2022 13:05
To: busybox at busybox.net
Subject: Re: IPv6 support with busybox

Hi,
I installed busybox 1.29.3. I have tried to run tcpdump on my target to check on issue.
I am running udhcpc6 by command - (udhcpc6 -b -p /var/run/udhcpc.usb0.pid -i usb0)

Below is dump o/p. Please give me hints. Am I missing something?

-------------------------------------------------------------------------------------------------------
17:15:27.615913 IP6 (hlim 1, next-header UDP (17) payload length: 62) fe80::f896:11ff:fe12:1314.dhcpv6-client > ff02::1:2.dhcpv6-server: [udp sum ok] dhcp6 solicit (xid=fdce7c (elapsed-time 65) (IA_NA IAID:986346022 T1:0 T2:0) (option-request DNS-server DNS-search-list) (Client-FQDN) (client-ID hwaddr type 1 fa9611121314))

On Tue, Apr 19, 2022 at 2:30 PM Vijay Khurdiya <vijay.khurdiya at gmail.com<mailto:vijay.khurdiya at gmail.com>> wrote:
Hi,
I would like to know from which version IPv6 support is available under busybox. I learned there is separate dameon  (udhcpc6) for IPv6.

I need to get an IPv6 address for Cellular network (M2M SIM).

Thanks

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