I've set the "Server Address" to "amsterdam.freenet6.net" instead of the default "authenticated.freenet6.net" to be sure to always get the same IPv6 address range.
After a reboot i get this:
2012:03:07-17:17:28 whity ipv6_watchdog[3839]: Starting IPv6 address watchdog
2012:03:07-17:17:31 whity tspc[4112]: gogoCLIENT v1.2-RELEASE build Oct 26 2011-19:23:39
2012:03:07-17:17:31 whity tspc[4112]: Built on ///Linux axgbuild 2.6.32.46-0.3-default #1 SMP 2011-09-29 17:49:31 +0200 i686 i686 i386 GNU/Linux///
2012:03:07-17:17:32 whity tspc[4112]: Failed to connect to server amsterdam.freenet6.net on port 3653.
2012:03:07-17:17:32 whity tspc[4112]: Disconnected. Retrying in 64392 seconds.
2012:03:07-17:17:46 whity radvd[5435]: version 1.8.3 started
2012:03:07-17:49:47 whity radvd[5438]: attempting to reread config file
2012:03:07-17:49:47 whity radvd[5438]: resuming normal operation
2012:03:07-17:49:50 whity radvd[5438]: attempting to reread config file
2012:03:07-17:49:50 whity radvd[5438]: resuming normal operation
But if i disable the tunnel broker and enable it again (without changing anything else) it reconnects correctly:
2012:03:08-08:33:10 whity tspc[4112]: Last status context is: Network connection.
2012:03:08-08:33:10 whity tspc[4112]: Finished.
2012:03:08-08:33:19 whity tspc[12742]: gogoCLIENT v1.2-RELEASE build Oct 26 2011-19:23:39
2012:03:08-08:33:19 whity tspc[12742]: Built on ///Linux axgbuild 2.6.32.46-0.3-default #1 SMP 2011-09-29 17:49:31 +0200 i686 i686 i386 GNU/Linux///
2012:03:08-08:33:19 whity tspc[12742]: Failed to contact TSP listener at amsterdam.freenet6.net.
2012:03:08-08:33:19 whity tspc[12742]: Disconnected. Retrying in 30 seconds.
2012:03:08-08:33:49 whity radvd[5438]: attempting to reread config file
2012:03:08-08:33:49 whity radvd[5438]: resuming normal operation
2012:03:08-08:33:49 whity radvd[5438]: attempting to reread config file
2012:03:08-08:33:49 whity radvd[5438]: resuming normal operation
2012:03:08-08:33:49 whity radvd[5438]: attempting to reread config file
2012:03:08-08:33:49 whity radvd[5438]: resuming normal operation
2012:03:08-08:33:50 whity tspc[12940]: Your IPv6 address is 2001:05c0:x:x:0000:0000:0000:6555.
2012:03:08-08:33:50 whity tspc[12940]: Your IPv6 prefix is 2001:05c0:x:x:0000:0000:0000:0000/56.
2012:03:08-08:33:50 whity tspc[12940]: Your IPv6 DNS address is 2001:05c0:x:x:0000:0000:0000:0002.
