DHCPv6 and prefix length

David W. Hankins dhankins at isc.org
Wed Sep 1 20:21:05 UTC 2010

On Mon, Aug 23, 2010 at 12:23:58AM +0200, "Petr Morávek [Xificurk]" wrote:
> the information on its own. As I understand it, there are currently no
> plans for fixing this issue systematically in the main tree of dhclient.

This is not true.  The plan is to use a VSIO option advertised by
compatible DHCPv6 servers, which the client can apply to the
allocated address.  In its absence, the client will use a /128 prefix
for the address, so that it will rely upon the RA-advertised covering

The original plan was to advertise an IETF-standardized prefix option
in-band with DHCPv6.

But if people are already having problems with non-64 prefix lengths,
then we cannot wait for that.

David W. Hankins	BIND 10 needs more DHCP voices.
Software Engineer		There just aren't enough in our heads.
Internet Systems Consortium, Inc.		http://bind10.isc.org/
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