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2 IBM and Cisco LAN Switching: Interoperability and Migration Guide
1.1 Migration methods
There are several ways to migrate. Most organizations have experience with
one or more of these methods. For reference, we will briefly review the most
common methods for providing growth and additional functions to a network.
1.1.1 Step-by-step box addition or replacement
As requirements for additional ports, capacity, or function arise, new
equipment is inserted into the network. Frequently, this equipment is of a
newer generation, and sometimes of another brand, than the existing
equipment. Over time all the original equipment is replaced. This is illustrated
in Figure 1.
Figure 1. Step-by-step box addition or replacement; some boxes are replaced, some are added
The approach in this scenario is widely used. It is often simple and
straightforward to implement. However, interoperability is an issue that must
be carefully planned.
Most of the networking equipment in the marketplace implement standards
for interoperability. IBM and other manufacturers acknowledge the legitimate
rights of customers to mix and match standards-based equipment and will
provide defect support to solve interoperability issues if necessary. This
redbook is an example of how IBM and Cisco cooperate to assure
interoperability between like products in the interest of the customers.
In this redbook, several scenarios are described in more detail, and examples
are given of Cisco products that interoperate with IBM Ethernet and ATM
switches and may be used to expand capacity and function in a mixed
environment.
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Cisco 3508
Cisco 2924XL
IBM 8275-416
IBM 8275-325
IBM 8275-322
IBM 8275-326
Cisco 2924XL
IBM 8275-325
IBM 8275-325