On Fri, 4 Oct 2019, Ole Troan wrote:
Ted,
[top posting]
RFC7084 does not have any support for internal routers.
While this is true, OpenWrt does support DHCPv6-PD within the home, out of
the box. I also have a report of AVN Fritzbox supporting sub-PD without
additional configuration.
In all devices I've looked at the WAN is WAN, it comes up with firewalls
on, requests PD etc, and if it doesn't get it then there is no GUA IPv6 on
LAN.
In my opinion the work in homenet could be leveraged into an operational
document where recommendations on what parts of homenet could be easily
implemented to make it work within a home (without implementing
everything), thinking primarily of "firewall off" and "service discovery
proxy on". If no PD was available, turn ethertype 0x86dd bridging on
between LAN and WAN. I guess we would still need to do NAT44 because
without HNCP there wouldn't be a route to the IPv4 network on LAN of the
"sub-router".
It would however mean that a printer on the sub-router LAN could be
reached over IPv6. In order for this to happen without HNCP then this
sub-router would need to send RAs on its WAN announcing reachability to
its LAN IPv6 prefix (either GUA+ULA if PD is available, otherwise just
ULA). I have never seen RA guard or similar functions in residential
equipment, so I would expect this to work.
--
Mikael Abrahamsson email: swm...@swm.pp.se
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