Compatible Systems 5.4 - Manual (Page 102)

96 Chapter 5 - DECnet Routing & Bridging
Hello Timer
DECnet hello messages tell end nodes which routers are available to route
packets. This parameter tells the router how frequently it should send hello
messages on this interface.
The Hello Timer value is also inserted into the hello messages themselves.
Once an end node has received a hello message from a router, it begins to
track the availability of that router. If an end node does not hear an additional
hello message within 3 timer periods, it assumes that this router is no longer
available.
The default value for this parameter is 30 seconds. The maximum value is
8191 seconds (approximately 2 hours and 15 minutes).
v Note: For dial-on-demand links, this parameter should be set to the
longest period practical, since the router will dial the remote end each time
one of these packets is sent.
Routing Timer
DECnet routing messages are exchanged between routers and contain routing
table information including node numbers, hello timer values, hop counts and
costs. This parameter tells the router how frequently it should send routing
messages on this interface.
The default value for this parameter is 120 seconds. The maximum value is
8191 seconds (approximately 2 hours and 15 minutes).
v Note: For dial-on-demand links, this parameter should be set to the
longest period practical, since the router will dial the remote end each time
one of these packets is sent.