RFC 22 Host-Host Control Message Formats October 1969 Please stop transmitting over link number L. This is called the CEASE directive. We are CLOSING our output link number L. You may get this message before the last message arrives over this link since control messages are higher priority than regular data messages. UNCEASE: that is, you may resume transmitting over output link number L. Each control message is embedded in the appropriate message structure e.g.: | HEADER | |____________________________________| | | | | | | mark | l | | | |______|_______|___________|_________| | | | | checksum | Padding | |_________________|__________________| typical control message (please establish auxiliary link #L2 parallel to our primary link #l) The header for all HOST-HOST control messages is given below: 0 3 4 7 8 9 10 14 LINK# 24 31 _______________________________________________________________ | | | | | |////////////////| | FLAGS | TYPE | H | SITE | 00000001 |////////////////| |_______|______|_____|_______|_______________|________________| where FLAGS - 0000 TYPE - 0000 (regular message) H - host #(0-3) at SITE (usually 0 for single HOST sites) SITE - Site # LINK# - 00000001 (HOST-HOST control link) [ This RFC was put into machine readable form for entry ] [ into the online RFC archives by Alison De La Cruz 12/00 ] Cerf