VDC (Virtual Device Contexts)

The Nexus 7000 supports VDC. VDC allows the partitioning of a single physical device into multiple logical devices.The logical separation provides the following benefits;

  • Admin and management separation
  • Change and failure domain isolation from other VDC
  • Address, VLAN, VRF and vPC isolation

Each VDC appears as a unique device and allows for separate Role-Based Access Control (RBAC).

Each VDC maintains an individual high-availability (HA) policy that defines the action that the system will take when a failure occurs within a VDC.

Some components are shared between VDC(s);

  • Single instance of the kernel which supports all of the processes and VDCs
  • Supervisor modules
  • Fabric modules
  • Power supplies
  • Fan trays
  • System fan trays
  • CMP
  • CoPP
  • Hardware SPAN resources

The curent max is 4 (the default and 3 additional)

Once the VDC is created the physical interfaces need to be assigned to it. Depending on the Ethernet modules you may need to allocate on a per-port basis or per-port group baisis.

Resources can also be allocated to an individual VDC including IPv4 route memory, IPv6 route memory, port-channels, and SPAN sessions.

Configuration

	(config)# vdc core 
	Note: Creating VDC, one moment please ...

	vdc core 
		allocate interface Ethernet1/17 
	    allocate interface Ethernet1/18
	show vdc membership 
	show vdc 
	show vdc core detail vdc id: 2

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