3Com PathBuilder S200 Series Owner's Manual page 48

Configuring the PathBuilder S200 Series Switch for Bridging Operation
PC
44
5) The PathBuilder S200 series switch transfers a copy of the ARE frame from the
LAN Port across LAN Bridge Link number 1 to the Bridge (Figure 24). Since the
frame is an All Routes Explorer, the Bridge broadcasts the frame across each of
the existing WAN Bridge Links (32 max) to the WAN Adapter module.
6) The WAN Adapter transmits each ARE frame to a separate, already established
SVC which connects it across the WAN to a remote node (Figure 25). Note that
in the node attached to LAN AAA, three bridge links (5, 6, and 7) to the WAN
side are necessary because they go to the three remote LANs to establish
complete bridges to those LANs. The three right-hand nodes really need only one
WAN Bridge Link each, but two additional ones are shown; they could be
attached to other bridges in other nodes not shown.
Port
55
LAN
AAA
Figure 24. PathBuilder S200 Series Switch Transfers a Copy of ARE
Frame to the Bridge Module
LAN Bridge Link
WAN
Bridge
5
Adaptor
ARE Frame
1
6
ARE Frame
7
ARE Frame
WAN Bridge Links
WAN
Port
SVCs
(PVCs for Frame Relay)
Bridging