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From: RAF@CU.NIH.GOV (Roger Fajman)
Newsgroups: comp.dcom.sys.cisco
Subject: Re:  SLIP on STS-10X terminal servers
Message-ID: <34214@boulder.Colorado.EDU>
Date: 16 Apr 91 02:20:22 GMT
Sender: daemon@boulder.Colorado.EDU
Lines: 15

> But for SLIP/PPP that's just fine, that how's we do congestion control
> in datagram networks................
>
> Marty

That's true, of course, for SLIP/PPP (although it's more common to drop
whole packets rather than pieces of packets), but dropping data out of
terminal sessions where there is no provision for retransmission is not
so fine.  With MNP or V.42 modems there is error detection and
correction on the phone lines.  In that case, the weak link is that
short RS-232 cable between the modem and the terminal server.  Genuine
errors due to noise on the RS-232 cable are not terribly likely, so if
there is an error it will probably be the terminal server dropping
bytes due to overload.  I don't want to have to explain that to our
users.