thanks
james
At 11:34 PM 7/4/2009, geopriv issue tracker wrote:
>#10: Server Version Support
>---------------------------------------+------------------------------------
> Reporter: martin.thomson@andrew.com | Owner:
>
> Type: enhancement | Status: new
>
> Priority: major | Milestone:
> draft-ietf-geopriv-3825bis
>Component: rfc3825bis | Version:
>
> Severity: - | Resolution:
>
> Keywords: |
>---------------------------------------+------------------------------------
>
>Comment(by bernard_aboba@hotmail.com):
>
> Incorporating suggestions from James.
>
> Client Version Support
>
> Clients implementing this specification MUST support receiving responses
> of versions 0 and 1. Since this specification utilizes the same DHCP
> option code as [RFC3825], the option format does not provide a means for
> the client to indicate the highest version that it supports to the server.
>
> Server Version Selection
>
> A DHCP server that provides location information cannot provide options
> with both v0 and v1 formats in the same response. This is not useful since
> receiving two copies of the same Option (either in the same response or a
> separate response) causes a DHCP client to replace the information in the
> old Option with the information in the new Option.
>
> A server uses configuration to determine which version to send in a
> response. For example, where a mixture of v0 and v1 clients are expected,
> the server could be configured to send v0 or v1 depending on configuration
> (possibly making the choice based on information such as the client MAC
> address). Where few v0 clients are expected, the server could be
> configured to send only v1 responses.
>
> Servers that opt to send location in v1 format are likely to cause clients
> that support only v0 to reject the Option. This results in a v0-only
> client not obtaining location information, with no ability to indicate to
> the server that v1 was unsupported. Therefore, in situations where some
> clients are known to support only v0, by default the server SHOULD send a
> v0 response.
>
>--
>Ticket URL: <http://trac.tools.ietf.org/wg/geopriv/trac/ticket/10#comment:4>
>geopriv <http://tools.ietf.org/geopriv/>
>
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