Installation guide

The screenmode command is the same on DIGITAL UNIX and
ULTRIX systems. This command enables or disables packet screening
by the kernel.
• screenstat
The screenstat command is the same on DIGITAL UNIX and
ULTRIX systems. This command displays statistics about kernel packet
screening.
4.11.2 Simple Network Management Protocol Agent
The DIGITAL UNIX system employs the snmpd daemon as a Simple
Network Management Protocol (SNMP) Agent. Like an ULTRIX system,
the DIGITAL UNIX system can be managed by a Network Management
Station (NMS) using SNMP. No changes are required for the NMS software
to manage a DIGITAL UNIX system.
The DIGITAL UNIX system does not include the ULTRIX Extended SNMP
Agent. Because this software is unavailable, you cannot define a private
Management Information Base (MIB) on a DIGITAL UNIX system.
In addition, the MIB on the DIGITAL UNIX system is an extended version
of the MIB on an ULTRIX system. The MIB contains all the variables that
are defined on an ULTRIX system and some new variables. The DIGITAL
UNIX MIB implements the Internet MIB-II standard and the proposed
Fiber Distributed Data Interface (FDDI) MIB Version 1.1 standard.
You set up SNMP on a DIGITAL UNIX system by using the snmpsetup
command, just as you do on an ULTRIX system. This command creates the
snmpd.conf and the inet_momd.conf files. The contents of these files
differ between DIGITAL UNIX and ULTRIX systems. The DIGITAL UNIX
/etc/netman/snmpd.conf file contains only community information.
SNMP reads other information, such as interface speed and interface type,
from the DIGITAL UNIX kernel. The /etc/netman/inet_momd.conf file
is a new file that contains the system location and system contact variables
for the Internet MIB-II standard.
4.12 Local Area Transport
Like an ULTRIX system, the DIGITAL UNIX system uses the local area
transport (LAT) protocol.
The following list compares the LAT on the DIGITAL UNIX system and
LAT on an ULTRIX system:
Overview of DIGITAL UNIX System and Network Administration 4–21