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Chapter 8. Cisco routing solutions
Routers provide access to data that is located in a different fabric. The principal
uses for storage routing are:
Storage area network (SAN) extension over Internet Protocol (IP) networks,
not the 9120 and 9140
Lowering connection costs using Small Computer System Interface over IP
(iSCSI), not the 9120 and 9140
Achieving isolation and interoperability between different business units
Managing scalability as your SAN environment grows
Migrating from an older storage environment to a newer one
The latter three features are inherent to the entire Cisco MDS ...