User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD ATSC SNMP Ethernet
Transmitter/Regenerative Translator Interface Description
Instruction Manual, Rev. 2 106
SNMP Interfaces
The Innovator CX Ethernet Controller implements Simple Network Management Protocol
(SNMP). SNMP is a standardized method of transferring information from one electronic
device to another. SNMP is typically used to remotely control and monitor several
transmitter devices from a centralized network management system (NMS). SNMP is a
communication method between two applications and is not a graphical user interface.
Therefore, SNMP functionality is included along with web page server functionality.
SNMP is used to gather information or set control states but it requires additional
computer applications for operator monitoring and control.
The Innovator CX Ethernet Controller implements SNMP version 2 (SNMP v2), using a
Management Information Base (MIB). The MIB file defines all SNMP parameters of the
transmitter, specifies the format of data, and orders the presentation of the parameters
using a hierarchical namespace containing object identifiers (OID). Each OID identifies a
variable that can be read, read and set, or only set via SNMP commands.
SNMP functionality also provides for alert messages that are issued from the Ethernet
Controller to one or two network computers. A SNMP trap message is sent only once
and is not acknowledged by the receiving device. The Ethernet Controller issues a trap
message when data is added to the transmitter Event log (either activation of a fault or
when a fault is cleared), or when the transmitter operate/standby status changes.
SNMP Configuration
The Ethernet Controller's TCP/IP Address, Subnet Mask, and Gateway must be
configured with static values that are valid within your network. Dynamic Host
Configuration Protocol (DHCP) is not implemented; however access to these
configuration parameters is available through the front panel setup menus of the
Innovator CX drawer.
The Innovator CX drawer’s SNMP MIB allows up to two SNMP trap destinations. The trap
destination values can be set through WEB pages. The TCP/IP address of a trap
processing computer can also be configured through the SNMP parameters called
'site_trap_adr1' and 'site_trap_adr2'. To clear a previously configured trap destination
and cause the system not to issue traps to a specific address, set the value to
'000.000.000.000'.
Reading of SNMP values is done with the message's community access set to 'public'.
When setting SNMP values, a default community access level of 'private' is used. Future
implementations of the Ethernet SNMP agent may allow for the set community access
level to be defined through the device's web server.