Re: [dhcwg] RFC 3315 - Dhcpv6 client message retransmission question

[Bud Millwood <budm at weird-solutions.com>]

On Wednesday 21 October 2009, Bud Millwood wrote:
> On Tuesday 20 October 2009, Bernie Volz (volz) wrote:
> > The randomization is +0.1 to -0.1 ... so this impact is small (it does
> > mean that the limit, which is also subject to randomization, could be 33
> > seconds to 27 seconds). I don't think it really changes much of anything
> > in my analysis and the point I was trying to make.
>
> Neither do I. It was a bit of a tongue in cheek comment about DHCPv4
> clients with no randomization whatsoever.
>
> Out of curiosity, why was +-0.1 chosen over DHCPv4's +-1.0 for each
> re-transmission? This is less spread with higher peak volume - what was the
> motivation for it?

We did some quick comparisons between the DHCPv4 and DHCPv6 backoff 
algorithms, and I don't see a *marked* difference in traffic spread, so I'll 
drop this.

- Bud

> > I guess you're predicting that DHCPv6 will hit the big time in 2012?
>
> OK... it's a prediction. Maybe we should start a pool. :)
>
> - Bud
>
> > - Bernie
> >
> > -----Original Message-----
> > From: dhcwg-bounces at ietf.org [mailto:dhcwg-bounces at ietf.org] On Behalf
> > Of Bud Millwood
> > Sent: Monday, October 19, 2009 8:22 AM
> > To: dhcwg at ietf.org
> > Subject: Re: [dhcwg] RFC 3315 - Dhcpv6 client message retransmission
> > question
> >
> > On Saturday 17 October 2009, Bernie Volz (volz) wrote:
> > > ... but as the delay between retransmissions should be
> > > doubled with each attempt up to a maximum of 30 seconds (REQ_MAX_RT),
> > > the difference between 10 and 5 may be as much as 5*30 seconds = 150
> > > seconds.
> >
> > To the guy in 2012 who is going to make our lives miserable because
> > you're too
> > overworked to read the RFC: That is **doubled WITH RANDOMIZATION**!
> >
> > - Bud
> > _______________________________________________
> > dhcwg mailing list
> > dhcwg at ietf.org
> > https://www.ietf.org/mailman/listinfo/dhcwg



-- 
Bud Millwood
Weird Solutions, Inc.
http://www.weird-solutions.com
tel: +46 8 758 3700
fax: +46 8 758 3687