Francis,
In section 4, you tried giving names to the various option
headers and i think it can be a bit more clearer. How about
the following :
1) The option header before routing header (called as
destination options (1) in rfc2460) can be called
as routing option header as this appears only with
routing header.
2) The new place that occurs between routing header and
fragment header can be called as Intermediate option
header.
3) The final one that appears after IPsec can be called
as Destination option header.
They all can have different types assigned by IANA to
keep it simple.
In section (5), you have argued that mutable options
existing after the routing header does not make sense.
But with tunnel encapsulation limit present in the
intrmediate position, the limit needs change as it
passes through tunnels. So, it is mutable. Could
you clarify ?
-mohan
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