System information

Chapter 4. ATM LAN backbone interoperability and migration 73

Figure 46. Ethernet backbone

Such replacement can now happen since we now have a solid Ethernet

backbone capable of handling heavy volumes of traffic and we also have the

functionality to prioritize and handle Quality of Service. In cases where it will

not be cost effective to upgrade older equipment, keep the ATM backbone

while the old, existing video equipment and switchboards are still in

operation.

Technology develops continuously and changes over time. Ethernet will

continue to change providing better functionality and services. This may well

push our scenario towards what is shown in Figure 46.

4.2 Interoperability testing

In December 1999, IBM and Cisco commenced extensive testing of

interoperability between IBM and Cisco ATM LAN switches. Phase 1 of these

tests has been completed. Please contact your IBM or Cisco representative

Cisco

Switch

8270

2900

Future

Video

Telephony

Special

7200

2900

WAN