Hi David, > While I happen to agree with you 2002::/16 SHOULD NOT be filtered, and RFC > 7526 is quite clear that 2002::/16 is still valid. However, it is perfectly > permissible to filter it, if that is the policy a network operator wishes to > enforce.
With the 6to4 anycast relays deprecated the only 6to4 traffic should be src 2002::/16 and dst 2002::/16. Sites that are not using 6to4 themselves can filter 2002::/16. Everybody else will only see IPv4+proto41 traffic, which is not impacted by that filter. Cheers, Sander
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