Cisco 8540 - Catalyst Campus Switch Router Modular Expansion Base Informations techniques Page 78

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68 IBM and Cisco LAN Switching: Interoperability and Migration Guide
physical Ethernet and token-ring LANs, and not only attached to the ATM
backbone. This does not affect the principles of our scenario.
Figure 44. ATM LAN backbone before migration
The solutions this network provides for its users include:
High-capacity backbone for token-ring LAN
High-speed server connections
Managing broadcasts
Integration of Ethernet and token-ring
Interfacing multimedia equipment
Sharing bandwidth between data and telephony transports
Bridging special-purpose ATM equipment to legacy LAN
It is likely that this network started as pure token-ring. Then the traffic on the
backbone ring grew and the servers needed more bandwidth. Technical
applications on UNIX workstations demanded Ethernet. The server
connections support both emulated Ethernet and emulated token-ring, but
IBM 8265
8270
8271
8270
8270
Before
MPEG,H.320
CES,CAS
Video
Telephony
Special
WAN
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