Avaya Configuring Frame Relay Services Manual de usuario Pagina 57

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Frame Relay Overview
117376-B Rev. 00 2-31
The router determines whether to route or bridge the packet, and then uses the
corresponding level of address. It uses routing-level addresses for routing traffic,
and the MAC-level addresses for bridging traffic.
Address-based distribution ensures that all outbound traffic travels on the same
path, and that packets arrive in sequence. For protocols that cannot receive packets
out of sequence, use this method. Note, however, that this option does not always
distribute traffic evenly across each line.
Protocol Prioritization and Multiline Incompatibility
You cannot use protocol prioritization with multiline. Protocol prioritization may
change the order of frames arriving over a multiline interface, and frame relay
multiline does not have the ability to correct the sequence.
PVC Pass Through
PVC pass through allows a single frame relay network access link to carry both
conventional network protocol traffic, and otherwise unroutable frame relay
access device (FRAD) traffic. It works with hybrid mode PVCs only. PVC pass
through connects two PVCs on separate interfaces so that the router can transmit
traffic it receives on one PVC out the other with no encapsulation requirements.
F
igure 2-12 illustrates how PVC pass through works.
Figure 2-12. PVC Pass Through
FRAD
DTE
DTE
DCE
DCE's
Router
PVC Passthru
IP Router
IP
IP
DLCI 50
DLCI 30
DLCI 30
Frame
relay
network
DLCI 20
FR0016A
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