Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

162 Chapter8
Additional DTC Configuration
Tuning Your DTC
4. Select one of two predefined sets of values for management timer.
The default is selection 1. The management protocol timers
determine different transmission algorithms.
5. After you have selected the desired timer values, press the
[Save Data] key.
6. Press the
[Prior Screen] key to return to the DTC Configuration
screen, or press
[Validate DTS/LINK] to validate your configuration if
you have completed configuration for your DTCs.
NOTE If you changed your network configuration, you need to validate the
configuration and cross-validate with SYSGEN before you exit
NMMGR. Refer to Chapter 5, “Configuring Serial Devices (for
Host-Based Management),” for information on these steps.
For host-based management, after you invoke dynamic configuration,
both host and DTC values will take effect once you logoff any sessions
or stop and restart the spooler associated with changed devices and
download the DTC. For PC-based management, only the host values
will take effect because the DTCs are managed by the OpenView DTC
Manager on the PC. You must use the OpenView DTC Manager to
configure and download the DTC timer values. In this case, you must
ensure consistency of timer selections between the host and the DTC
during configuration in NMMGR and OpenView DTC Manager.
Fields AFCP Timer
Set 1 Normal timer mode. This selection is appropriate for
most users operating in a normal LAN environment.
AFCP Timer
Set 2 Short retransmission timer mode. This is appropriate
in a LAN environment where there is a high number
(greater than 1%) of packets lost on the LAN. The
values are adapted to provide shorter retransmission
values and higher number of retries.
AFCP Timer
Set 3 Long retransmission timer mode. This is appropriate in
a LAN environment where the LAN is very reliable.
The values are adapted to reduce LAN traffic and host
driver overhead.
AFCP Timer
Set 4 Variable retransmission timer mode. This is
appropriate in exceptional cases where there is a very
high percentage of lost packets on the LAN. The values
are adapted to prevent saturation of the LAN.
AFCP Timer
Set 5 MPE XL release 1.2 timer mode. This is appropriate for
use with HP 3000 MPE XL FOS release 1.2.