Figure 5. Architecture of the Source-Routing/Transparent (SRT) Bridge
Figure 5 shows an architectural model of the SRT bridge. When the SRT
bridge receives a frame, it examines the Routing Information Indicator (RII).
Frames with RII=1 are processed using source routing (SR) logic. Frames
with RII=0 are processed using transparent bridge (TB) logic. The RII is the
first bit transmitted of the source station address (MAC address). This bit
occupies the same position in the source address as does the
individual/group bit in the destination station address.
Source-Routing/Transparent Bridge Versus Source-Routing Bridge
A source-routing (only) bridge provides inter-ring communication only for
systems that support source routing. Systems that do not support source
routing can communicate only with systems on the same token ring. An SRT
bridge, in contrast, provides inter-ring communication for systems that
support source routing as well as those that do not support source routing.
Higher-Layer Entities
(Bridge Managment, etc.)
LLC Entity
LLC Entity
SR LOGIC
TB LOGIC
RII = 1
MAC Entity
MAC Entity
Yes
No
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N
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2
Bridging Service
Token Ring Solutions
2-13
Содержание 600 Series
Страница 1: ...Hewlett Packard Series 200 400 and 600 Routers HP Routing Services and Applications ...
Страница 4: ......
Страница 5: ...1 Product Notes ...
Страница 6: ...Features of HP Routers Architecture and Technology Branch Office Routing Product Notes 1 2 ...
Страница 38: ...Architecture and Technology Software Control Path Architecture 1 34 ...
Страница 52: ...Branch Office Routing Future Directions 1 48 ...
Страница 53: ...2 Routing Services Notes ...
Страница 106: ...Bridging Service Traffic Prioritization 2 54 ...
Страница 158: ...Novell IPX Routing Service NetBIOS Protocol Support 2 106 ...
Страница 194: ...Data Compression for WAN Links Conclusion 2 142 ...
Страница 195: ...3 Application Notes and Case Studies ...
Страница 224: ...Improving Network Availability Application Recovery 3 30 ...
Страница 234: ...ISDN Wide Area Network Design Dry Creek Joint Elem School District Performance 3 40 ...
Страница 316: ......