HP 200 Series Services And Applications page 89

Bridging Service
Source-Routing Bridging
Source Route Translational Bridging (TRNSB)
Source Route Translational Bridging (TRNSB) translates frames between
source-routing bridging (SRB) circuit groups and transparent bridging (TB)
circuit groups. The router translates frames for protocols such as SNA or
NetBEUI between token ring circuit groups configured for SRB and
Ethernet circuit groups configured for TB. (NetBEUI is the name of the
protocol driver installed as the default protocol for MS LanManager and IBM
LanServer). TRNSB also converts for WAN links configured for SRB or TB,
as appropriate.
N o t e
Before reading on, ensure that you understand the explanation of trans-
parent bridging (TB), source-routing bridging (SRB), and global source
routing, earlier in this section.
Figures 25 through 28 below illustrate some common topologies that can use
TRNSB.
Ethernet
Token
HP Router
Ring
TR
PC
3270
IBM
3174
Mainframe
Figure 25. Simple One-Hop TRNSB Topology
In figure 25, the PC running the PC3270 application is limited to either 802.3
or Ethernet frame format, and transparent bridging. (SRB is not supported
on 802.3 or Ethernet.) The 3174 is limited to 802.5 framing, and only supports
source route bridging. The HP Router TR will provide the necessary conver-
sion for these devices to communicate.
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