[HECnet] "Dropped by adjacent node" ....

[Paul_Koning at Dell.com]

On May 27, 2014, at 3:17 PM, Bob Armstrong <bob at jfcl.com> wrote:

in Phase IV the hello timer value is sent in the hello message
and that value times 3 (or 2) is used for the listen timer

That would explain why having LEGATO send hello messages more often
doesn't make any difference   

If you send hellos more often, you time out sooner; either way, you time out if you lose 3 hellos in a row (or, probably just barely, if you lose two in a row).   The assumption is that no LAN is that badly broken.

The way to run DECnet over a flaky long distance network is to use point to point mode with a data link layer that deals with packet loss.   DDCMP is an example of such a data link layer; X.25 is also (after a fashion).   That   s what the DECnet design intended.

	paul