Alpha Technologies AlphaNet IDH4 for XM3-HP Series - Technical Manual - Manual (Page 86)

86 746-257-B5-001, Rev. A1 (11/2013)
13.0 Dual IP Mode (Addendum)
13.1 Overview
The IDH4 Series can operate in either Single (default) or Dual IP mode. In Single IP mode, 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. In Dual IP mode, the transponder acts like a CPE device to the cable
modem and registers a second IP address on the public CPE network.
The following table lists some of the common characteristics of the IDH4 Single IP and Dual IP
configurations:
Single IP Dual IP
Network All 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 acts like a CPE device to the cable
modem and registers a second IP address on the public
CPE network.
Data Access The Network Management System requires
access to the same private modem network.
Dual IP mode allows the power supply data to be
accessed and managed from anywhere within the
public (CPE) network.
Security Communication with the transponder is limited
to the private LAN network, and is very secure.
Since the transponder is a CPE on the public network,
access may be less secure.
IP Addresses Where the IP address pool is limited, there is
no need to issue the transponder a CPE IP
address. Only one (1) IP Address is required for
the cable modem of the IDH4.
The CPE requires its own IP address, which may be
in short supply. A total of two (2) IP addresses are
required, one for the cable modem and one for the
transponder.
Data Management Access to the transponder is limited to the
private LAN network making data management
less versatile, especially for field personnel.
The transponder is accessible on the public (CPE)
network. This makes data management more versatile
for field personnel.
Table 13-1, Single IP Mode versus Dual IP Mode
One CM IP address only accessible on the private (LAN)
network with access to both CM and transponder data.
Cable Modem Transponder
MIB Tables
IDH4
Fig. 13-1, Simplified Block Diagram
Single IP Mode
Cable Modem Transponder (CPE)
MIB Tables
IDH4
One CM IP address, CM and transponder data;
accessible on the private (LAN) network.
One CPE IP address, transponder data only;
accessible on the public (CPE) network.
Fig 13-2, Simplified Block Diagram
Dual IP Mode