Upleveling for a minute, why are we even including Link Layers in the Node *Requirements* doc?
Clearly, we aren't *requiring* any of them, since choice of appropriate L2s depends on the environment. Indeed, draft-ietf-6man-node-req-bis-02.txt says: 4. Sub-IP Layer An IPv6 node must include support for one or more IPv6 link-layer specifications. Which link-layer specifications are included will depend upon what link-layers are supported by the hardware available on the system. It is possible for a conformant IPv6 node to support IPv6 on some of its interfaces and not on others. As IPv6 is run over new layer 2 technologies, it is expected that new specifications will be issued. This section highlights some major layer 2 technologies and is not intended to be complete. And then goes on to say things like: 4.1. Transmission of IPv6 Packets over Ethernet Networks - RFC 2464 Nodes supporting IPv6 over Ethernet interfaces MUST implement Transmission of IPv6 Packets over Ethernet Networks [RFC2464]. 4.2. IP version 6 over PPP - RFC 5072 Nodes supporting IPv6 over PPP MUST implement IPv6 over PPP [RFC5072]. 4.3. IPv6 over ATM Networks - RFC 2492 Nodes supporting IPv6 over ATM Networks MUST implement IPv6 over ATM Networks [RFC2492]. Additionally, RFC 2492 states: A minimally conforming IPv6/ATM driver SHALL support the PVC mode of operation. An IPv6/ATM driver that supports the full SVC mode SHALL also support PVC mode of operation. So, as Pekka points out, the list is incomplete as is. And one might wonder why ATM is listed over any other number of other L2s... That said, I would suggest that having (in one place) a list of link layers that IPv6 is defined to work over is useful. Not to require any of them, but just to have a list of them all in one place. How about removing all of the individual subections (4.1 - 4.3) and add a simple table that lists the IPv6 over Foo documents that folk might want to be aware of. I agree with others that this document shouldn't be giving stronger/different advice than is being given in other documents already, so just providing pointers to those other documents seems reasonable. Thomas -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------