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[dhcwg] Re: Renumbering DNS with stateless DHCPv6 - bug?

Iljitsch van Beijnum <iljitsch@muada.com> Thu, 13 November 2003 22:07 UTC

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From: Iljitsch van Beijnum <iljitsch@muada.com>
Date: Thu, 13 Nov 2003 14:05:11 -0600
To: Tim Chown <tjc@ecs.soton.ac.uk>
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Subject: [dhcwg] Re: Renumbering DNS with stateless DHCPv6 - bug?
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On 13-nov-03, at 13:11, Tim Chown wrote:

> With DHCPv6 Light for DNS option configuration, how is the client told
> that DNS options have changed?

Operationally, you'd probably have to support these addresses forever. 
Not just because of DHCP issues but also because users tend to jot down 
dynamic stuff and then hardcode it. (For instance for hosts that don't 
support dynamic DNS discovery (which obviously are almost all of them 
today (in IPv6)).)

> One option for passing the new DNS options from the DHCPv6 Light server
> to the client is a multicast Reconfigure message.

Hm, I can already imagine the posters on the men's room at IETF 63: 
"whoever is sending "reconfigure DNS" multicast messages every second, 
quit it as the 1200 DHCPv6 requests per second are killing the wireless 
performance".

There are DoS issues here.


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