In a message dated 06/05/2001 10:25:09 AM Eastern Daylight Time,
[EMAIL PROTECTED] 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
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