Re: [mif] I-D draft-ietf-mif-dhcpv6-route-option-03 published

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 13 September 2011 01:22 UTC

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Date: Tue, 13 Sep 2011 13:24:44 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Subject: Re: [mif] I-D draft-ietf-mif-dhcpv6-route-option-03 published
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On 2011-09-13 02:14, Simon Perreault wrote:
> On 2011-09-12 10:02, Alexandru Petrescu wrote:
>>> I don't see the use case. Can't the DHCP client on the very small
>>> platform just install the default route first, then whatever other
>>> routes it can support, and ignore the rest?
>> Do you think there exist a DHCP way to say: "install the default route
>> first and, if you have enough memory, install these specific routes"?
> 
> Maybe it can be written in the draft. For example:
> 
> Hosts MUST install routes in the order they are listed. If any routes
> cannot be installed due to resource constraints, routes MAY be dropped
> starting from the end.
> 
> With this, the operator can put the default route first and obtain the
> behaviour you're describing.

That won't work if the host also gets a default route from RA. There's
nothing to stop DHCPv6 and RA being used simultaneously, for different
prefixes, and providing different default routers.

   Brian