Operating instructions

User Interfaces DVB3030/DVB3030L Digital Video Broadcast Modulator
4-40 TM052 - Rev. 3.5
6 Twisted Pair Input 1 (TPIN)
7 NC
8 NC
4.4.1 SNMP Overview
The simple Network Management Protocol, SNMP, is used by industry to manage networks. On
a network, a client in one host, an SNMP manager, communicates with a server in another host,
an SNMP agent. The manager requests the agent to read or write information (objects) in a
Management Information Base, MIB, resident in the agent.
4.4.1.1 Object Identifiers
An object identifier is a sequence of integers separated by decimal points. These integers go
through a tree structure, similar to a Unix file system. Figure 4-12 shows the structure of this
tree when used with SNMP. All variables in the standard MIB start with the object identifier
1.3.6.1.2.1. All variables in the Radyne Private MIB start with the object identifier
1.3.6.1.4.1.2591. The Private Enterprise Number 2591 is a unique identifier assigned to Radyne
by the Internet Assigned Numbers Authority (IANA). This number is used to uniquely define
vendor specific information such as private MIBs.
4.4.2 Management Information Base
The MIB is the database of information maintained by the agent that the manager can query or
set. The standard MIB is described in RFC 1213. The Radyne MIB is listed at the end of this
document.
4.4.2.1 Front Panel Control
A top-level sub-menu, titled "Options", is added to the Front Panel ‘System’ Menu. The user has
the capability to disable/enable the SNMP option, and view both the Ethernet and IP Addresses
of the modem and the default router, and the IP Address Mask. The Modem Ethernet Address is
set at the factory to a unique value that can never be changed to avoid
address conflicts with external devices.
4.4.2.2 Terminal Control
A new terminal screen is added to the terminal interface to view and set the modem
Ethernet/SNMP Parameters. The modem can be interactively monitored and controlled in the
Terminal mode, with a full screen presentation of current SNMP settings and status.
Programming is accomplished by selecting the item to be modified and following user prompts.
For example, to change the control mode, press the '2' Key on the terminal. The switch will
respond by presenting the options available and requesting input. Two types of input may be
requested. If the input is multiple choice, the user can scroll through the various choices using
the space bar and then pressing 'Enter'. The other possible input type requires a numerical input
and then pressing 'Enter'. An input can be aborted at any time by pressing the 'ESC' key.
Invalid input keys cause an error message to be displayed on the terminal.
Following a valid input, the switch will place the new setting into the non-volatile RAM making it
available immediately and also automatically the next time the unit is powered up.
The user has the capability to disable/enable the SNMP Option, and view both the Ethernet and
IP Addresses of the modem and the default router, and the IP Address Mask. The Modem