Hi guys,
the following updates / changes for IPv6 have been commited to OpenWrt
in the last days. Most of these affect RFC 6204 CE-compliance, some are
convenience changes.
Feel free to merge and test CeroWrt.
* Detect and delegate IPv6-specific MTU from upstream interfaces (e.g.
tunnels, pppoe, etc.) and propagate them to downstream interfaces
(supporting cases where IPv4-MTU and IPv6-MTU differ, e.g. 6in4, 6rd,
6to4, ...)
* Add a default null-route for delegated prefixes (CE-requirement WPD-6)
This fixes routing loops in case packets with a destination within an
unused / unassigned part of a delegated prefix are received.
* Added support for site-borders (interfaces which ULA-traffic might not
cross) as specified in CE-requirement ULA-4
* Added support to override CE-requirement ULA-5 for NPT-setups (iirc
not relevant if dnsmasq is used, as it does not follow ULA-5).
Documentation on http://wiki.openwrt.org/doc/uci/network6 has been updated.
Btw. Simon Kelley released 2.66-test4 which fixes some bugs related to
stateful DHCPv6 and should make it usable finally. Also the new
MTU-propagation mentioned above is now supported by dnsmasq as well.
I haven't tested it myself yet but you can try if you are brave.
I will try to make a table about the RFC requirements for Customer Edge
(CE)-Routers soon which sums up which requirements are fulfilled and
which are still not implemented both for CeroWrt / OpenWrt with 6relayd
and with dnsmasq as RA/DHCPv6-server.
Cheers,
Steven
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