John,
I was hoping for something a little more specific, helping to clear up just
what an implementation needs in order to be conformant. How does something
like the following sound?
4.4.5 Stateful Address Autoconfiguration
Stateful Address Autoconfiguration is conditionally mandatory. For those
IPv6 Nodes that implement a stateful configuration mechanism such as
[DHCPv6], those nodes SHOULD/MUST initiatiate stateful address
autoconfiguration upon the reciept of a Router Advertisement with the
Managed address flag set. In addition, as defined in [RFC2462], in the
absence of a router, hosts that implement a stateful configuration
mechanism such as [DHCPv6] MUST attempt to use stateful address
autoconfiguration.
For IPv6 Nodes that do not implement the optional stateful configuration
mechanisms such as [DHCPv6], the Managed Address flag of a Router
Advertisement can be ignored. Furthermore, in the absensce of a router,
this type of node is not required to initiate stateful address
autoconfiguration as specified in [RFC2462].
Adam Machalek
<john.loughney@no
kia.com> To: <[EMAIL PROTECTED]>,
<[EMAIL PROTECTED]>
cc:
06/28/2002 05:54 Subject: RE: Stateful Address Config -
I-D
AM
ACTION:draft-ietf-ipv6-node-requirements-00.txt
Hi Adam,
Very good point.� I have added the following text:
4.5.5 Stateful Address Autoconfiguration
IPv6 Stateless Address Autoconfiguration [RFC2462] defines stateless
address autoconfiguation.� However, it does state that in the absence of
routers, hosts must perform host MUST attempt to use stateful
autoconfiguration. �There is also reference to stateful address
autoconfiguration being defined elsewhere. Additionally, DHCP [DHCP]
states that it is on option for stateful address autoconfiguation.
>From the current set of specification, it is not clear the level of
support that is needed for statefull Address Autoconfiguration.
-----Original Message-----
From: ext Adam Machalek [mailto:[EMAIL PROTECTED]]
Sent: 21 June, 2002 18:52
To: [EMAIL PROTECTED]
Subject: Stateful Address Config - I-D
ACTION:draft-ietf-ipv6-node-requirements-00.txt
John,
Section 5.4 on DHCPv6 states that DHCPv6 is unconditionally optional,
which today implicitly makes Stateful Address config optional.
However, I'd like to see some direct clarification in this document on
Stateful Address config, probably directly after Section 4.5.2 discussing
Stateless Address config.
RFC2462 has some ambiguities, in particular, it states "a managed address
configuration flag indicates whether hosts should use stateful
autoconfiguration", not SHOULD. � Later in 2462 in section 5.2 it
continues this ambiguity by never explicitly using MAY/SHOULD/MUST
anywhere.
Still later in section RFC2462 5.5.2 Absence of Router Advertisements, it
finally states that in the absence of a router, a host MUST attempt to use
stateful autoconfiguration.
And lastly, the DHCPv6 draft states "DHCP is one vehicle to perform
stateful autoconfiguration", implying that there may be others.
So in the end, even with DHCPv6 optional, this doesn't clarify exactly
what a host should do about Stateful Address autoconfiguration.
Adam Machalek
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