Path: utzoo!mnetor!uunet!husc6!hao!ames!ucbcad!ucbvax!SUN.COM!melohn
From: melohn@SUN.COM (Bill Melohn)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Response to Long Distance NFS Query
Message-ID: <8712220701.AA02500@sluggo.sun.com>
Date: 22 Dec 87 07:01:57 GMT
References: <8712202159.AA13986@ucbvax.Berkeley.EDU> <1649@faline.bellcore.com>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 9

You can corrupt an NFS file system invisably by sending NFS/UDP
packets over an unreliable datalink (like the current version of SLIP)
without first turning on UDP checksums, which has been possible since
SunOS 3.2. With our point to point IP router, we do a CRC at the
serial chip level, making it act like an ethernet. Other people have
done NFS over SLIP using error-detecting modems like the Telebit
Trailblazer. In any case, the trend is towards error-free or at least
error correcting hardware/networks, so the NFS/UDP default seems even
more reasonable in a high-fibre future.