Alpha Technologies DSM3 for XM3 - Technical Manual - Manual (Page 11)

11 745-814-B11-001, Rev. C (03/2014)
The DSM3 Series cable modem must 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).
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 Communications Module 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 insure 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 SNTP 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
NOTE:
Before installation, read all of
Section 2.0, Overview.
DSM3 Series installation and setup is comprised of three basic steps:
1. Configuring the Network: Provisioning the DHCP Server with the Communications Module’s MAC
address and assigning it a DOCSIS Configuration File.
2. Setting Options: The DSM3 Series 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 DSM3
Series proprietary options may be set through type-11 TLV entries. The SCTE-HMS and Alpha MIBs
may need to be compiled into a MIB browser before it can be used to monitor or set Communications
Module and power supply parameters.
3. Field Installation of the DSM3 Series into the power supply, connecting the battery string wire
harnesses, Tamper, and Environmental Control (as applicable) 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.
2.0 Overview
2.2 Network Connectivity