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+v1.6 2nd Sep 2003, Pekka Savola <pekkas@netcore.fi>
+
+IPv6 CHANGES
+============
+
+This mentions the most important changes (visible to the administrator)
+in IPv6 initscripts.
+
+RHL9 -> CURRENT
+---------------
+
+ - no major functional changes, only bugfixes and cleanups
+
+RHL80 -> RHL9
+-------------
+
+ - 6to4 device MTU is calculated explicitly, IPV6TO4_MTU support added
+ - add route6-<device> static route support
+ - secondary IPv6 addresses are configurable on tunnel interfaces too
+
+RHL73 -> RHL80
+--------------
+
+ - no major functional changes
+
+RHL72 -> RHL73
+--------------
+
+ - 6to4 device changed from sit0 to tun6to4
+ - 6to4 assumes the anycast (closest) 6to4 server is used (192.88.99.1)
+   unless specified with IPV6TO4_RELAY.
+ - 6to4 does not support automatic tunneling *at all* anymore; use
+   IPV6_AUTOTUNNEL if you want to use it.
+ - All support from NBMA tunnels as well as 6to4 using sit0 was removed
+ - IPV6TO4_CONTROL_RADVD and IPV6TO4_RADVD_PIDFILE was changed to
+   IPV6_*, respectively.
+ - IPV6_DEFAULTGW and IPV6_DEFAULTDEV support was introduced;
+   /etc/sysconfig/static-routes-ipv6 must not be used for them anymore.
+
+Rough guide to migration:
+ - Rename IPV6TO4_CONTROL_RADVD to IPV6_CONTROL_RADVD if exists
+ - Rename IPV6TO4_RADVD_PIDFILE to IPV6_RADVD_PIDFILE if exists
+ - Remove "default" route from /etc/sysconfig/static-routes-ipv6 and replace
+   it with something like IPV6_DEFAULTDEV=tun6to4 in /etc/sysconfig/network
+ - If you need autotunneling, use IPV6_AUTOTUNNEL in /etc/sysconfig/network
+
+RHL71 -> RHL72
+--------------
+
+ - 6to4 tunneling support was added using device sit0
+ - Tunneling method was changed from NBMA (now obsolete) to dedicated
+ - Automatic tunneling configured was moved from ifcfg-sit0 to
+   IPV6_AUTOTUNNEL at /etc/sysconfig/network
+
+
+
+Some more information
+---------------------
+
+http://www.bieringer.de/linux/IPv6/IPv6-HOWTO/scripts/current/ ,in particular:
+http://www.bieringer.de/linux/IPv6/IPv6-HOWTO/scripts/current/index.html#migration