Open Stack

Ha yes, I completely forget IPv6 case.
Sorry and forget that thread.

Édouard.


On Thu, Feb 20, 2014 at 3:34 PM, Veiga, Anthony <
Anthony_Veiga at cable.comcast.com> wrote:

>  This would break IPv6.  The gateway address, according to RFC 4861[1]
> Section 4.2 regarding Router Advertisements: "Source Address MUST be the
> link-local address assigned to the interface from which this message is
> sent".  This means that if you configure a subnet with a Globally Unique
> Address scope, the gateway by definition cannot be in the configured
> subnet.  Please don't force this option, as it will break work going on in
> the Neutron IPv6 sub-team.
> -Anthony
>
>  [1] http://tools.ietf.org/html/rfc4861
>
>   Hi,
>
>  Neutron permits to set a gateway IP outside of the subnet cidr by
> default. And, thanks to the garyk's patch [1], it's possible to change this
> default behavior with config flag 'force_gateway_on_subnet'.
>
>  This flag was added to keep the backward compatibility for people who
> need to set the gateway outside of the subnet.
>
>  I think this behavior does not reflect the classic usage of subnets. So
> I propose to update the default value of the flag 'force_gateway_on_subnet'
> to True.
>
>  Any thought?
>
>  [1] https://review.openstack.org/#/c/19048/
>
>  Regards,
> Édouard.
>
>
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