Bridging; Understanding; Configuring; Sdms Interface - GE MDS Master Station Technical Manual

Output - Use for selecting and applying a QoS policy (from the available QoS policies) to
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the outgoing traffic on this interface. See "Quality of Service (QoS)" in the MDS Orbit
MCR Technical Manual (05-6632A01) for more information on creating QoS policies.

5.8 Bridging

Understanding

The unit supports transparent bridging of LAN, and in firmware versions of 3.0.0 and higher,
WiFi and SD networks. The bridge forwards traffic between LAN interfaces and wireless inter-
faces at the layer-2 of OSI model. This allows LAN and wireless clients to be in the same IP
sub-network.
The bridge learns the clients' locations by analyzing the source address of incoming frames from
all attached networks. For example, if a bridge sees a frame arrive on LAN port from Host A, the
bridge concludes that Host A can be reached through the segment connected to LAN port.
Through this process, the bridge builds a forwarding table (the learning process). When a frame
is received on one of the bridge's interfaces, the bridge looks up the frame's destination address
in its forwarding table. If the table contains an association between the destination address and
any of the bridge's ports aside from the one on which the frame was received, the frame is for-
warded out the indicated port. If no association is found, the frame is flooded to all ports except
the inbound port. Broadcasts and multicast also are flooded in this way.
The bridged network is addressable via the 'bridge' interface (a virtual interface). The interfaces
that are in the bridge are called bridged interfaces. The interfaces that are not in the bridge are
called routed interfaces. Bridging is performed between bridged interfaces. Routing is performed
between routed interfaces. The bridge interface itself is a routed interface.
In firmware versions less than 3.0.0, the SD interface is not a bridgeable interface as
there is no packet or packet-with-MAC mode support in these versions of firmware.

Configuring

For full details on configuring bridge interfaces, please see the MDS Orbit MCR Technical
Manual (05-6632A01).

5.9 SDMS Interface

Understanding
The configuring of SD interfaces on the Master Station is performed through a virtual interface
called 'sdms' (SD Master Station). This virtual interface, much like a bridge interface, is com-
prised of one or more sd-nic member physical interfaces. Each installed SDM Radio Module
contains a single sd-nic. All configurations applied to the virtual SDMS interface will be propa-
42 MDS™ Master Station MDS 05-6399A01, Rev. E