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From: deering@SU-PESCADERO.ARPA.UUCP
Newsgroups: mod.protocols.tcp-ip
Subject: time-to-live
Message-ID: <86.05.29.0248.690@su-pescadero.arpa>
Date: Thu, 29-May-86 05:48:00 EDT
Article-I.D.: su-pesca.86.05.29.0248.690
Posted: Thu May 29 05:48:00 1986
Date-Received: Thu, 29-May-86 23:41:08 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 14
Approved: tcp-ip@sri-nic.arpa

Please excuse me if this has all been discussed to death in the past,
but I'm seeking the answers to the following two questions:

  (1) Do any existing host or gateway implementations of IP ever decrement
      the time-to-live field of a IP datagram by more than 1?  I.e., does
      anyone actually check for datagram holding times of more than one
      second and adjust TTL accordingly?

  (2) The IP spec (RFC791) says "...every module that processes a
      datagram must decrease the TTL by at least one...".  Is this
      normally interpreted as including the originating host IP
      module and/or the final destination host IP module?

							-- Steve Deering