[ipv6hackers] Question on DHCPv6 address assignment

Mark ZZZ Smith markzzzsmith at yahoo.com.au
Sat Feb 1 03:57:42 CET 2014

Scott, what specific DHCPv6 server are you describing? You're using a lot of "believe", "to my knowledge", etc., which sounds a bit second hand. I think Fernando is after first hand experience and details of specific implementations.


----- Original Message -----
> From: Scott Hogg <scott at hoggnet.com>
> To: Fernando Gont <fgont at si6networks.com>; IPv6 Hackers Mailing List <ipv6hackers at lists.si6networks.com>
> Cc: 
> Sent: Saturday, 1 February 2014 11:27 AM
> Subject: Re: [ipv6hackers] Question on DHCPv6 address assignment
> Yes, I believe it works just like DHCP for IPv4 in that respect.
> However, each DHCPv6 server could be configured for different behavior for 
> lease times, renewals, etc.
> The ICMPv6 RA message would dictate that the clients perform stateful 
> address assignment (DHCPv6), but a host could choose to ignore that 
> recommendation and proceed with a static IPv6 address.
> That is why DAD is important in all cases prior to assuming use of an IPv6 
> address.
> Scott
> -----Original Message----- 
> From: Fernando Gont
> Sent: Friday, January 31, 2014 3:33 PM
> To: IPv6 Hackers Mailing List
> Cc: scott at hoggnet.com
> Subject: Re: [ipv6hackers] Question on DHCPv6 address assignment
> Hi, Scott,
> On 01/31/2014 06:46 PM, Scott Hogg wrote:
>>  1) To my knowledge, most DHCPv6 servers hand out randomized interface
>>  identifiers within the scope range.
>>  2) Hosts typically renew their lease at 50% of the lease time.  If the
>>  lease time is one week, then, most hosts that are joined to the network
>>  regularly will renew their least at 3.5 days and keep a fairly stable
>>  address.
> Same thing after boot-strapping? i.e., last-used address is renewed as
> opposed to getting a new randomized address?
> Thanks!
> -- 
> Fernando Gont
> SI6 Networks
> e-mail: fgont at si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
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