STATUS_MESSAGES - E1.20 RDM (Remote Device Management) Protocol Forums

ericthegeek · October 19th, 2009

> An "ACK_BUSY" (with a timer) would be rather
> useful in that instance

NACK w/ NR_BUFFER_FULL is not exactly what you're looking for, but is close enough to probably work.

RDM is not a reliable transport protocol, so any device is free to drop any packet at any time for any reason (or no reason). A well designed controller will re-try any critical requests. Still, it's generally a bad practice to design-in dropping packets. You'll see enough dropped packets in the field due to noise, bad cables, etc.; If you start deliberately dropping packets, it just makes things that much more difficult.

October 19th, 2009	#10
ericthegeek Task Group Member Join Date: Aug 2008 Posts: 390	> An "ACK_BUSY" (with a timer) would be rather > useful in that instance NACK w/ NR_BUFFER_FULL is not exactly what you're looking for, but is close enough to probably work. RDM is not a reliable transport protocol, so any device is free to drop any packet at any time for any reason (or no reason). A well designed controller will re-try any critical requests. Still, it's generally a bad practice to design-in dropping packets. You'll see enough dropped packets in the field due to noise, bad cables, etc.; If you start deliberately dropping packets, it just makes things that much more difficult.