Fabric Extender; Cisco Nexus 2000 Series - Cisco WS-C3750G-48PS-S Switch Manual

Notes
Cisco Fabric Extender Architecture
Cisco Nexus 2000 Series Fabric Extenders logically behave like a
remote line card, and together with the Cisco Nexus parent switch it
forms a distributed modular system. The Cisco Nexus 2000 Series
Fabric Extenders forwards all traffic to the parent Cisco Nexus 5000
or 7000 Series Switch over 10 Gigabit Ethernet uplinks. Passing all
traffic to the parent switch allows traffic to be shaped according to
policies established on the parent Cisco Nexus 5000 or 7000 Series
Switch with a single point of management.
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