version
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... Increment the EDNS version ...
...
Another possible solution is to increment the EDNS version number as
defined in [RFC2671], on the assumption that all existing
...
... defined in [RFC2671], on the assumption that all existing
implementations will reject higher versions than they support, and
retain the DO bit as the signal for DNSSEC ...
... Unfortunately, without signed zones there's no clear incentive for
operators of resolvers to upgrade their software to support the new
version of DNSSEC, as defined in RFC 3658(-> 4035prop | 4034prop | 4033prop). Historical data suggests
...