Alpha Technologies AlphaNet IDH4 for XM2 and XM2-300HP Series - Technical Manual - Manual (Page 11)

11 746-257-B2-001, Rev. B (01/2014)
The IDH4 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 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 insure network integrity, but common
considerations are:
• MAC filtering may have to be modified to allow RF MAC registration of addresses starting with
00:26:97.
• 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 the “System Overview” Sections.
IDH4 Series 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 IDH4 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, while IDH4 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 transponder and power supply parameters.
3. Field Installation of the IDH4 Series into the power supply, connecting the battery sense wire
harnesses 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