JiH> Date: Thu, 27 Nov 2003 06:09:55 +0900 (JST)
JiH> From: Jun-ichiro itojun Hagino

[ CC list trimmed ]
[ somewhat snipped, but lines not rewrapped ]


JiH> 	where in RFC791 can i find statement that TTL field has to be used for
JiH> 	reassembly buffer management?  i don't see any, therefore i understand

"Some higher level reliable connection protocols are based on
assumptions that old duplicate datagrams will not arrive after a
certain time elapses.  The TTL is a way for such protocols to
have an assurance that their assumption is met."


JiH> 	TTL field as the lifetime during transit (defined as "seconds" in the
JiH> 	past, used as "hop count" in reality).  "internet system" in the
JiH> 	following statement does not include the reass buffer in the
JiH> 	destination node, i assume.

As others have stated, TTL _still_ means time to live.  Each hop
rounds TTL up to the next second; what you observe is a special
case for when all hops are < 1 sec, _not_ the strict definition.

Please show RFCs updating or obsoleting 791.


Eddy
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