version
Click on the red underlined text to get to the source
... Some ICMP implementations, produced between 1999 and the time of this
publication, may send a non-compliant version of ICMP extensions
described in this memo. Specifically, these implementations may
...
... Extension Header, it must contain a valid version number and
checksum. If it does not contain a valid ...
... checksum. If it does not contain a valid version number and
checksum, the application correctly determines that the message does
...
... original datagram field represent the
correct values for an extension header version number and
checksum
...
... original datagram"
field. If the application detects a valid version and checksum, it
will treat the octets that follow as an extension structure.
...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| (Reserved) | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
...
... Conta, A., Deering, S., and M. Gupta, Ed., "Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification", RFC 4443draft, March 2006. ...