Library /sys$common/syshlp/ess$lastcphelp.hlb START TRANSPORT, /CHECKSUM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 	Format:	START TRANSPORT /CHECKSUM

 Establish mandatory data checksumming for all messages exchanged
 between the current node and any remote node.  LASTDRIVER  computes a
 checksum for all messages, and verifies the checksum on all received
 messages.