CDM-840 Remote Router MN-CDM840
Appendix E Revision 3
E–4
E.2.3 VLAN Trunking
In a VLAN Trunking topology (Figure E-4), the Hub side equipment functions as a VLAN trunking
interface. You can map Outbound packets (Hub to Remote) to the desired QoS Group (see Sect.
E.6).
By default, the CDM-840 Remote Router equipment functions as a VLAN trunk and passes all
traffic received on the WAN and Traffic LAN ports. In this mode, you should have a VLAN-
enabled Ethernet Switch at each remote to properly break out the VLAN into the desired
network topology.
In addition, you can optionally configure the CDM-840 in Access Mode with a user assigned
VLAN ID (see Sect. E.4).
Figure E-4. BPM with VLANs
E.3 Packet Processing
E.3.1 Traffic Network / Ethernet Switch Behavior
The Advanced VSAT BPM feature functions as a Learning Ethernet Switch when you set the
“Working Mode” to BPM. BPM has the following basic functionality:
• MAC addresses associated with each segment/port are learned by inspecting the source
MAC for packets arriving at each Ethernet port.
• Once the port association for a MAC address is learned, an Ethernet Switch will not transmit
Ethernet packets with that MAC address to other segments/ports.
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