CDM-570L/570AL Satellite Modem with Optional Packet Processor
Revision 5
Optional High Performance Packet Processor D–14 MN-CDM570A
• Managed Switch Mode also supports VLAN’s and when VLAN Mode is enabled, will
forward traffic as follows:
o If an untagged packet arrives at the Packet Processor, it will egress as a tagged
packet with the defined Native VLAN ID.
o VLAN entries can be added into the VLAN Table and to forward VLAN's over the
satellite. A VLAN entry is also needed on the receiving CDM-570A to receive the
VLAN traffic and they will egress as tagged VLAN's.
o If a tagged packet arrives at the Ethernet port, it will only be forwarded if there is a
matching VLAN entry in the VLAN Table and it will egress as tagged. If there is no
matching VLAN in the VLAN Table, the tagged packet will be dropped.
• VLAN operation in the CDM-570A/570AL-IP also includes full 802.1Q VLAN QoS
support. With the QoS Option enabled, the Packet Processor will read the 802.1Q VLAN
Priority (7 through 0) that is in the VLAN Header in each VLAN frame received and will
prioritize traffic accordingly.
D.1.2.5.2 Combined Working Mode
In order greatly simply the configuration complexity, the working modes operation of modem have
been centralized in the single Working Mode configuration parameter, which in turn offer the
following functional parameters:
Managed Switch
Managed switch with support for VLAN as well as advanced features
such as QoS, Header Compression and Payload Compression.
Primarily intended for operation in a point-to-point topology.
Router – Small Network Mode
Hub side router in a Point-to-Multipoint network. Allows Sat-to-sat.
Router – Large Network Mode
Remote Router in a Point-to-Multipoint network. Packets from the WAN
are not allowed to be sent to the WAN. No longer requires HDLC
receive addresses to be configured.
Point-to-Point router in Point-to-Point configurations.
Hub router in a Vipersat Network.
The Vipersat “Unit Role” and “Expansion Role” parameters are not read-only.
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