Vadim Antonov <avg@titan.sprintlink.net> Wed, 12 January 1994 23:49 UTC
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From: Vadim Antonov <avg@titan.sprintlink.net>
Message-Id: <199401122213.RAA17983@titan.sprintlink.net>
To: catnip@world.std.com
TTL: >We still want a nominal time associated with it, for when a router >hangs onto a datagram for a longer than usual time (typically waiting >for some kind of subnetwork setup). Probably 1/10 second is good; it >must be less than IP's (1 sec) and less than CLNP (500 msec) >It also seems that 8 bits is really sufficient. Not at 1/10 seconds! The problem is that there are links which can delay a packet for up to a minute while establishing a connection. We'll see more and more of them with the proliferation of dial-up IP and the real cheap 19.2Kbps modems. [Discarding a packet which initiated the connection is also not a good idea because it's most likely a TCP init packet which will be retransmitted with large delays and user is already irritated :-)] I would propose "logarithmic" time -> TTL translation; i.e. 1/16 sec delay equals 1 hop 1/8 sec == 2 hops 1/4 sec == 3 hops etc. I'm not sure what the implications of that scheme are. --vadim
- Vadim Antonov
- tracym
- Re: (it must be lost) Matt Crawford