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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!harvard!seismo!rochester!ritcv!ccivax!crp
From: crp@ccivax.UUCP (Chuck Privitera)
Newsgroups: net.bugs.4bsd,net.unix-wizards
Subject: FYI rwhod problems
Message-ID: <221@ccivax.UUCP>
Date: Tue, 13-Nov-84 16:01:25 EST
Article-I.D.: ccivax.221
Posted: Tue Nov 13 16:01:25 1984
Date-Received: Sat, 17-Nov-84 04:28:57 EST
Distribution: net
Organization: CCI Telephony Systems Group,  Rochester NY
Lines: 12


	Just FYI. Since I saw one complaint about something not
working right with the itt interface from harvard (and because I
spent some time on it). Those of you using the itt driver (does
TCP/IP over tty lines for those that don't know), you may also
see seemingly catatonic behaviour from rwhod. The problem is that
when a system has > ~11 users, the structure that rwhod broadcasts
becomes larger than the defined MTU (maximum transmission unit) for
the itt interface. This causes the sendto() in rwhod to fail with
EMSGSIZE (the write failed because it could not be atomic). For the
rest of you with REAL network interfaces, you can expect to see this
seemingly catatonic behaviour from rwhod after ~59-60 users.