beautypg.com

0 dual ip mode, 1 overview – Alpha Technologies AlphaNet IDH4 for XM2 and XM2-300HP Series - Technical Manual User Manual

Page 76

background image

76

746-257-B2-001, Rev. B (01/2014)

11.0 Dual IP Mode

11.1 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 Communications Module 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 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 Communications Module 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 Communications

Module is limited to the private LAN network,

and is very secure.

Since the Communications Module 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 Communications Module

a CPE IP address. Only one (1) IP Address is

required for the cable modem of the IDH4x or

IDH4L.

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

Communications Module.

Data Management

Access to the Communications Module is

limited to the private LAN network making data

management less versatile, especially for field

personnel.

The Communications Module is accessible on the

public (CPE) network. This makes data management

more versatile for field personnel.

Table 11-1, Single IP Mode versus Dual IP Mode

One CM IP address only accessible on the private (LAN)

network with access to both CM and Communications

Module data.

Cable Modem

Communications Module

MIB Tables

IDH4

Fig. 11-1, Simplified Block Diagram

Single IP Mode

Cable Modem

Communications Module (CPE)

MIB Tables

IDH4

One CM IP address, CM and Communications Module

data; accessible on the private (LAN) network.

One CPE IP address, Communications

Module data only; accessible on the public

(CPE) network.

Fig 11-2, Simplified Block Diagram

Dual IP Mode