Date: Tue, 5 Jun 2001 12:04:36 EDT From: Bsdguru@aol.com To: louie@transsys.com Cc: hackers@freebsd.org Subject: Re: How to disable software TCP checksumming? Message-ID: <94.150764fd.284e5d14@aol.com>
next in thread | raw e-mail | index | archive | help
In a message dated 06/05/2001 10:25:09 AM Eastern Daylight Time, louie@TransSys.COM writes: > Suspect hardware problem? Of course you should! That's why memory > systems have parity or ECC, and I/O buses are similarlly protected. At > least on real computers. Your view of the world is a bit misguided. I know of a situation a few years back where cascade switches were doing ATM to Frame Relay conversion and sending out mal-formed packets due to a bug in their reassembly procedure. Cisco routers (which pass data without checksuming and dont checksum pings) never saw a problem, but our unix boxes were complaining regularly. A similar situation occurred with cheap ethernet bridges that a service provider was using to colocate to a building across the street to uunet truncated packets with volumes over 2mb/s. Checksumming is there for a reason. You premise that "just because there are no physical errors, the data must be good" is simply defective. Bryan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?94.150764fd.284e5d14>