Ethernet Overview; Interface Architecture; Modes Of Ethernet Operation - Comtech EF Data CDM-425 Installation And Operation Manual

I.2

Ethernet Overview

I.2.1

Interface Architecture

Figure I-1 shows the internal Ethernet architecture for the CDM-425 Advanced Satellite Modem,
which features four built-in 10/100 BaseT Ethernet Ports (port configuration and statistics are
available on a per-port basis) connected to a single internal Ethernet Layer 2 Managed Switch.
I.2.2

Modes of Ethernet Operation

The Ethernet interface is configurable for Managed Switch Mode when the optional IP Packet
Processor is either not installed or installed but disabled; or in Router Mode or Managed Switch
Mode when the optional IP Packet Processor is installed and enabled. This interface design
allows for multiple customer Ethernet interfaces, as well as the convenience of daisy-chaining
together of multiple CDM-425s.
Additionally, because the M&C processor is connected to the internal Ethernet Switch, M&C
traffic is available via all LAN interfaces as well as via the over-the-air WAN interface.
Appendix I
Figure I-1. Ethernet Architecture Design
I–2
CDM-425 Advanced Satellite Modem
MN-CDM-425
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