[Dibbler] DHCPv6 server decline - failure

Jyrki Soini Jyrki.Soini at iki.fi
Tue Jan 17 18:36:18 CET 2012


On Sun, Jan 15, 2012 at 4:24 PM, Ron, Omer1 <omer1.ron at intel.com> wrote:
> Hi,
>
>
>
> Failing when performing DHCPv6 server decline test:
>
>     step 1. Initiate a DHCPv6 Decline for the client current IPv6 address
>
>     step 2. Verify that the server sends a Reply message with status code of
> 0 'Success'
>
>     step 3. Client sends DHCPv6 solicit to server.
>
>     step 4. Verify that the server assigns an address to client
>
>     step 5. Verify that the address assigned by the server is not the same
> as the client's original address
>
>
>
> ·        all solicit messages from clients are send without IA_NA-options
> meaning there is no IPv6 hint.
>

RFC3315 Section 17.1.1. Creation of Solicit Messages states:

   The client uses IA_NA options to request the assignment of non-
   temporary addresses and uses IA_TA options to request the assignment
   of temporary addresses.  Either IA_NA or IA_TA options, or a
   combination of both, can be included in DHCP messages.

So, if there is no IA_NA option, the server is not requested to give
the address.

Hint is IA address option (section 22.6) embedded in IA_NA (22.4) or
IA_TA (22.5)
option. Client may omit the hint.

Besides, server may give the client every time the same address. That is totally
upon the server implementation or configuration policy issue. For
instance, server may
assign the client address that has the same interface identifier part
as the clients
link-local address has.



> ·        The advertise send from server does not include IPv6 address.
> (failing the test)
>
> ·        When sending solicit message with IPv6 hint a new IPv6 address is
> assigned to client.
>
>
>
> Appreciate your help solving this issue.
>
> Thanks,
>
> Omer
>

--
Jyrki


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