Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!panda!talcott!harvard!seismo!brl-tgr!tgr!ron@BRL-TGR From: ron@BRL-TGR (Ron Natalie) Newsgroups: net.unix-wizards Subject: Re: Time to live values for IP networks. Message-ID: <8829@brl-tgr.ARPA> Date: Fri, 1-Mar-85 13:03:58 EST Article-I.D.: brl-tgr.8829 Posted: Fri Mar 1 13:03:58 1985 Date-Received: Mon, 4-Mar-85 06:21:45 EST Sender: news@brl-tgr.ARPA Lines: 12 Every module that processes a packet should decrement time to live by the number of seconds that it has the packet (minimum of 1 if less than one second). What a counts as a module is unclear. In the gateways we use, I decrement it once on the way in, and if the packet is not for the gateway itself, once on the way out. You just pick a time to live value that you think is reasonable to get it to the destination. Note that the old 4.1 TCP code used to decrement ttl by 5 on input and output. This seemed a little excessive. -Ron