HP 600 Series, Services And Applications

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Figure 26. Transparent WAN Backbone Topology
Figure 26 illustrates a common WAN topology that can use TRNSB. In this
case, the primary bridging technology is transparent bridging. Thus, the
WAN circuit group is not configured for source-routing bridging. Most traffic
crossing the WAN is TB traffic going to and from the Ethernets. The user
also has a need to print to the HP LaserJet printer on the Ethernet at site 2
from the client PC at site 1. The HP Router TR at site 1 will convert the
NetBEUI/SRB/802.5 frames to NetBEUI/TB/802.3 frames.
Figure 27. Token Ring Backbone Topology
Figure 27 shows an example of a 16 Mbit/s token ring SRB backbone, used to
interconnect two distributed Ethernets. This topology is often found in envi-
ronments where many departments have installed their own LANs, while the
site services organization (often in coordination with the information tech-
nology organization) has specified token ring as the backbone technology.
Token
Ring
HP Router
TR
HP Router
ER
Ethernet
Client
PC
Site 1
Transparent
Site 2
Server
Token
Ring
HP Router
TR
Ethernet
Client PC
PC
Server
Token
Ring
Ethernet
IBM
SRB HP Router
TR
Bridging Service
Source-Routing Bridging
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