[OpenWrt-Devel] DHCPv6 flash renumbering patches with HE tunnel breaks

Steven Barth cyrus at openwrt.org
Fri Mar 27 08:08:10 EDT 2015

On 27.03.2015 10:41, Kevin Darbyshire-Bryant wrote:
> On 26/03/2015 23:51, Steven Barth wrote:
>> Radvd isn't part of OpenWrt for a while. dnsmasq doesn't support
>> downstream delegation and its DHCPv6 features aren't well integrated
>> if you have a dynamic prefix e.g. delegated from your ISP.
> I've been messing with the 'constructor' option for quite a while which
> is supposed to handle dynamic prefix allocation/deprecation, admittedly
> with my HE tunnel things aren't very (at all!) dynamic, but dnsmasq does
> pick up new publicly routable prefixes and start RA & DHCPv6 on them
> automagically for me.  From my /etc/dnsmasq.conf
> dhcp-range=lan,::100, ::F:FFFF:FFFF, constructor:br-lan, ra-names, 64, 12h
> enable-ra
Sure that works, but you can't e.g. number downstream routers with this 
only clients.
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