Expand Configuration and Management Manual (G06.24+)

Configuring the Network Control Process
Expand Configuration and Management Manual—523347-008
6-5
$NCP Modifiers
ALGORITHM n
Default: 0 (MSH)
Units: Not applicable
Range: 0 or 1
This modifier identifies $NCP routing algorithm to be used. Specify 0 for MSH or 1 for
split horizon (SH). The ALGORITHM modifier must be set to the same value on all
systems in the network.
Modified split horizon (MSH) and split horizon (SH) algorithms are explained in detail in
Routing Algorithms on page 18-28.
AUTOMATICMAPTIMER n
Default: 1 (on)
Units: Not applicable
Range: 0 or 1
This modifier causes $NCP to exchange distance vector (DV) messages at variable
rates, depending on the time factor (TF) of the path involved and the presence or
absence of changes to the network. If you specify 1 (the default), the DV propagation
rate is 8 seconds multiplied by the TF for the path. A value of 0 specifies an algorithm
with a 5-minute propagation interval. The use of DV message exchanges is described
in detail in Regular Maps Exchanges on page 18-27.
CONNECTTIME n
Default: 0
Units: 0.01 seconds
Range: 1,000 through 30,000 (10 seconds to 5 minutes)
This modifier specifies the length of time, in one-hundredth of a second increments,
that $NCP will wait for a response to its connect (CONN) request. If you specify 0 (the
default), $NCP computes the connect request timer independently for each connection
using the following formula:
0.5 * tf_to_destination
tf_to_destination is learned through NETMAPs received from neighboring
systems. You can specify a value in the range 1,000 through 30,000 to set the connect
request timer to a noncomputed number of seconds for all connections.
CONN requests are described in Protocol Packet Types on page 18-13 and TFs are
described in Routing and Time Factors on page 18-22.