It seems to me that we do not need the X-bit even
in the Login PDU.
"Connection reinstatement"/"implicit connection
logout" can be implicitly
signaled by using an active ISID-TSID-CID
combination to request the
target to implicitly logout the connection state
machine for the CID. This is
conceptually nothing but the "option A" choice
we made for implicit
session logout sometime ago (remember the "reusing ISID for recovery"
thread?), albeit at
the connection level. As far as I can tell, the current
X-bit in Login PDU is similar to the C-bit that we considered
for "implicit" session logout. I suggest we apply the same design principle
I propose that the draft should continue to
formally define the notion of
"connection reinstatement" with the existing rules
on its usage, but retire
the X-bit to make that bit position reserved. Leaving the X-bit in would only
lead to needless error cases.
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