Extension Header
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... node when processing destination
options and other extension headers, and hence are sent end-to-end
between unicast addresses ...
... (usually the destination) is unable to process a correctly formed
extension header or option. If these messages are not returned to
the source, communication cannot be established, as the source would
need to adapt its choice of options probably because the destination ...
...
Code 0 (Erroneous Header) messages indicate a malformed extension
header generally as a result of incorrectly generated packets.
Hence, these messages are useful for debugging purposes, but it is
unlikely that a node ...
... probe or scan a network by
deliberately generating packets with unknown extension headers or
options or with faulty headers. If nodes ...
... nodes in the network support all legitimate
extension headers, then it would be reasonable to drop all outgoing
Parameter Problem messages. Note that this is not a major
vulnerability ...