SatX/SE300—
Modem Connectivity Use Cases Examples
Proprietary and Confidential
166
16.2.2
L2 VLAN Switching Mode
L2 VLAN switching mode is used in both point-to-point and point-to-multipoint configurations. In this
mode, each remote is assigned with one or more 802.1Q VLAN tags, so the data LAN interface (GigE
connector) in the modulator will be sent to its designated remote over the satellite link and exit at the
other end in the demodulator LAN interface (GigE connector) only at the remotes configured as part of
this VLAN tag.
Let us now, explore the functionality of this mode, and see the difference in the behavior of the
network. With this mode, the user needs to define the remotes, and then assign a different tagged
VLAN per remote. Several VLANs may be assigned to a single remote, however only one remote can be
assigned to a certain VLAN.
F
IGURE
155:
T
YPICAL
P-
T
-MP
A
PPLICATION
With this configuration, as remotes can be distinguished we can set each remote to a different ModCod,
thus optimizing the space segment, and also make sure that each modem on the remote filters out only
the allowed VLANs. Thus we have solved the issues of using L2 transparent mode.
Since the hub consists of modulator and demodulators an additional aggregation setup is required at
the hub Ethernet switch to ensure correct port allocation for data transmission and data gathering to a
single port. This requirement is shown in the Figure 156.