Re: [v6ops] new draft: draft-vyncke-v6ops-ipv6-only-thin-clients

Alexandru Petrescu <alexandru.petrescu@gmail.com> Mon, 29 June 2015 08:32 UTC

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Date: Mon, 29 Jun 2015 10:31:58 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] new draft: draft-vyncke-v6ops-ipv6-only-thin-clients
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> IPv6-Only for Wired Thin-Clients

Examples of recent wired thin clients please?  I am left at the point 
where HP's Apollo workstation and Sun's network computers disappeared 
from the market?

The initial issues presented - "Wake-on-LAN" and "PXE" - are valid in my 
thick laptop as well.

draft says:
>    In IPv6, there is no directed broadcast for good reason.  Only a
>    link-local multicast group such as ff02::1 for all link-local hosts.
>    So, the magic packet for a single host could be sent to this
>    multicast group, reaching all link-local hosts (as switches and
>    routers will forward this packet to all ports/interfaces) and waking
>    up the sleeping node.  But, there is no solution for a remote
>    operator to send this magic packet...

A 'directed broadcast' in IPv4 parlance RFC2644, that needs to reach 
across-the-subnet groups, would mean a classical IPv6 multicast group 
with global scope.  The thin clients on a subnet would join this 
multicast group before going to sleep.

I guess this would work.

I guess this would benefit from a registration of particular multicast 
group.

Or otherwise is there a problem in that the magic packet is a non-IP 
packet?  If yes then either we make the magic packet an IP packet (IPv4 
and IPv6) or we request IEEE to implement link-layer across-the-subnet 
multicast, if such a thing could exist.

Other issues to be suggested to an IPv6-only draft: a recent SDN 
implementation absolutely needs IPv4 to make IPv6 work, details on the 
web.  But this may be too high level?

Alex


Le 27/06/2015 13:47, fred@cisco.com a écrit :
> A new draft has been posted, at http://tools.ietf.org/html/draft-vyncke-v6ops-ipv6-only-thin-clients. Please take a look at it and comment.
>
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