VDC (Virtual Device Contexts)

Cisco Mar 24, 2013

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.


	(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


Rob Edwards

Northern (UK) chap focusing on platforms, automation, cloud and cloud native applications. Recovering network engineer, although it turns out networking is as important, if not more, now than before!