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This chapter describes the Cisco NX-OS Fibre Channel, virtual Fibre Channel, and Fibre Channel over Ethernet (FCoE) commands that begin with N.
To enable N Port Virtualization (NPV) disruptive load balancing, use the npv auto-load-balance disruptive command. To disable this feature, use the no form of this command.
npv auto-load-balance disruptive
no npv auto-load-balance disruptive
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Disruptive load balancing can be configured only in NPV mode.
When disruptive load balancing is enabled, NPV redistributes the server interfaces across all available NP uplinks when a new NP uplink becomes operational. To move a server interface from one NP uplink to another NP uplink, NPV forces reinitialization of the server interface so that the server performs a new login to the core switch. This action causes traffic disruption on the attached end devices.
To avoid disruption of server traffic, enable this feature only after adding a new NP uplink, and then disable it again after the server interfaces have been redistributed.
This example shows how to enable disruptive load balancing:
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To configure an N Port Virtualization (NPV) traffic map, use the npv traffic-map command. To disable this feature, use the no form of this command.
npv traffic-map server-interface { fc slot / port | vfc vfc-id } external-interface fc slot / port
no npv traffic-map server-interface { fc slot / port | vfc vfc-id } external-interface fc slot / port
No traffic map. The switch uses automatic uplink selection to select an NP uplink for the server interface.
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This command is only available when the switch is operating in NPV mode.
This example shows how to create a mapping between server interface vfc1 and NP uplink fc 3/1:
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