VN-Tag Overview
The Cisco Nexus 2000 Series fabric extender acts as a remote line card to a parent switch, as stated earlier. All control and management functions are performed by the parent switch. Forwarding is performed by the parent switch. The physical ports on the Nexus 2000 fabric extender appear as logical ports on the parent switch, and the hosts connected to the Nexus 2000 fabric extender appear as if they are directly connected to the parent switch.
A frame exchanged between the Nexus 2000 fabric extender and the parent switch will have an information tag inserted in it called VN-Tag, which enables advanced functions and policies to be applied to it. The host connected to the Nexus 2000 fabric extender is unaware of any tags.
At the ...
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