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SatX/SE300—Modem Connectivity Use Cases Examples
L2 VLAN switching
L3 IP routing
16.2.1
L2 Transparent Bridging Mode
L2 transparent bridging mode is used for any type of data transmission for both point-to-point and
point-to-multipoint configurations. In this mode, any data entering the LAN interface (GigE connector)
in the modulator will be send transparently over the satellite link, and exit at the other end in the
demodulator LAN interface (GigE connector).
When working in point-to-point configuration, no additional considerations are required. When shifting
to a point-to-multipoint application, several aspects should be considered as explained below.
Let us consider a 1-to-3 application where 250Mbps are transmitted from the hub to three different
remotes, receiving 100Mbps, 80Mbps and 70Mbps respectively. Each remote transmit back 25Mbps to
the hub, as shown in Figure 154.
In this case, we may encounter the following issues:
Security breach: All remotes will receive the complete 250Mbps data, though each remote should
only see its own data.
Higher Data Rates at the Modem GigE: 250Mbps instead of 100Mbps (80Mbps or 70Mbps), so a
switch/router with 1Gbps must be used.
All remotes must use the same ModCod: The data stream cannot distinguished between remotes,
and this may cause a lower utilization of the space segment, as the remote with lowest reception
conditions will be the bottleneck and will determine a lower ModCod for all remotes.
An alternative mode, which enables overcoming these issues with the use of L2 VLAN switching or L3 IP
routing is provided.
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154: S
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ONFIGURATION
XAMPLE
Proprietary and Confidential
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