Comtech EF Data CDD-562AL, Installation And Operation Manual

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CDD-562AL/564A/L Multi-Channel Demodulator Revision 0
IP Module Ethernet Interface MN-CDD562AL564AL
4–7
4.4 Typical IP Module Operational Setups
The CDD-56xA/L has several modes of operation. The typical setup examples that follow serve as a
means to determine the best mode of operation for the appropriate network topology and Ethernet traffic
environment.
4.4.1 IP Module Working Modes
Typical CDM-IP modems support two Working Modes: Managed Switch Mode (formerly
easyConnect

) and Router Mode; however, the demodulator only supports Router Mode, so the CDM-IP
modem that is transmitting to demodulator must be in Router Mode. Non-IP traffic is not supported in
Router Mode.
Router Mode supports three HDLC Addressing Modes: Point-to-Point, Small Network, and Large
Network. Separate HDLC Modes allow the user to minimize the HDLC overhead transmitted over the
satellite based on the size of their network.
In Router/Point-to-Point Mode, no HDLC address is transmitted, Router/Small Network transmits 1 byte,
and Router/Large Network transmits 2 bytes as part of HDLC header for each packet.
In the sections that follow, the functionality of these modes is described in further detail, in order to
optimize the Comtech EF Data IP modems in the network, based upon Network Topology and Ethernet
Traffic requirements.
The demodulator only supports Router Mode, so the CDM-IP modem that is transmitting to demodulator
must be in Router Mode.
The HDLC Address Mode of the Comtech EF Data IP modems must be identical to pass traffic between
the TX modems and the demodulator.
Changing the HDLC Address Mode of the demodulator requires the IP Module to be rebooted. Before the
user can select a different mode, the demodulator will notify the user that changing the mode will require
a reboot.
Working Mode
HDLC Address Mode
Network Topology Ethernet Traffic
Router Mode
Point-to-Point
Point-to-Point only
Both sites on different LAN subnet
IP v4 only
Router Mode
Small Network
Point-to-Point or Point-to-Multipoint (up to 254 sites)
All sites on different LAN subnet
IP v4 only
Router Mode
Large Network
Point-to-Point or Point-to-Multipoint (up to 32766 sites)
All sites on different LAN subnet
IP v4 only
Feature Support - The demodulator also has several standard and optional features to further optimize
security, performance and efficiency.
Standard Features Additional Notes
HDLC Address Mode Point-to-Point, Small Network, or Large Network
Access Lists 4 Clients by IP or IP Subnet