Avaya Configuring Bridging Services Manual de usuario Pagina 152

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Configuring Bridging Services
4-4 114060 Rev. A
-- If the source address is in the RIF table, updates its routing information.
-- If the destination address is in the RIF table, discards the frame since it is
intended for an SR station.
-- If the destination address is not in the RIF table or the forwarding table,
converts the frame and sends it out all other TB ports.
Routing of Specific-Route Frames
Once an endstation on the SR network determines the route between itself and
another endstation by sending out explorer frames, it can send a frame destined
for that other endstation. This frame is a specifically routed frame (SRF). If the SR
bridge receives an SRF that includes the ring ID of the TB network in its routing
information, the SR bridge forwards the frame to the translation bridge. The
translation bridge completes these steps:
If the destination address exists in the forwarding table, the translation bridge
converts the frame and forwards it to the appropriate TB network interface. If
the destination address is not in the forwarding table, the translation bridge
converts the frame and floods it to all TB network interfaces.
If the SRF’s source address is not already in the RIF table, the translation
bridge adds it to the database and stores its routing information.
TB Operations
When the transparent bridge receives a frame from a TB network, it determines
what to do based on the frame’s source and destination address, as follows:
If the source address is not in the forwarding table, the transparent bridge adds
it.
If the destination address is in the forwarding table as a station on a TB
network, the transparent bridge sends the frame to the appropriate TB port.
If the destination address is in the forwarding table as a station on an SR
network, the transparent bridge forwards the frame to the translation bridge.
The translation bridge then converts the frame, adds its routing information
from the RIF table, and forwards the frame to the appropriate SR port.
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