2.0 Overview, continued
11
704-939-B10-001 Rev. A5 (06/2019)
2.2 Network Connectivity
The transponder’s cable modem must be provisioned to be recognized by the CMTS as a valid device to be assigned an
IP address from the DHCP server, to locate the TFTP and TOD servers and to communicate with the SNMP management
server (trap receiver). The DM3X Transponder must be provisioned in the cable system to allow it to be recognized by the
CMTS, receive an IP address, TOD, TFTP files and communicate with the SNMP management system.
In single IP configured devices, data from both the cable modem and power supply are accessed and managed through
the modem’s IP address on the secure private modem network. The transponder is not accessible from the public
Customer Premises Equipment (CPE) network. Consequently, the Network Management System (NMS) that monitors the
power supplies must have access to the same private modem network.
CMTS and system vendors use different security methods to ensure network integrity, but common considerations are:
• Network MAC filtering may have to be modified to allow the cable modem OUI of 00:90:EA for North America, and
00:03:08 for European models.
• For SNMP access, UDP ports 161 and 162 must not be blocked.
• For TFTP access, port 69 must not be blocked.
• For HTTP access, port 80 must not be blocked.
• For TOD access, port 37 must not be blocked.
• Firewalls must allow TFTP, DHCP, SNMP and TOD communication to the cable modem.
• If the address of the TFTP or TOD server is different than the DHCP server, the response from the DHCP server
must contain the TFTP and TOD addresses.
2.3 System Configuration and Installation
DM3X Transponder installation and setup is comprised of three basic steps:
1. Configuring the Network: Provisioning the DHCP Server with the transponder’s MAC address and assigning it a
DOCSIS Configuration File.
2. Setting Options: The DM3X Transponder is designed for out-of-the-box, “plug and play” operation, but non-default
settings such as SNMP trap destination addresses may be required for the Network Management System (NMS).
SNMP trap addresses can be set automatically via the DOCSIS Configuration File per RFC 4639 (IPv4), or
through SNMPv3 Notification settings (IPv6), while proprietary options may be set through type-11 TLV entries.
3. Field Installation of the DM3X Transponder into the power supply, connecting the battery string wire harnesses,
Tamper, Environmental Control (as applicable), RF drop cable and verifying operation.
These steps can be performed independently of one another. However, configuring the network prior to field installation
will allow the installation to be verified while personnel are still on-site. Performing field installation before network
configuration and before the installation can be verified, might result in additional field service calls to correct mistakes.
Carefully read the following section in order to understand the dependencies within the system before performing system
configuration or hardware installation.
Before installation, read all of
Section 2.0, Overview.
NOTICE
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