| S.N. | VDC | VRF |
| 1 | Cisco Nexus has a feature of VDC (Virtual Device Context), by which you can divide a single physical Nexus Switch into two or more logical switches. These logical switches will perform as independent switches. |
It allows multiple instance of routing table in a single Layer 3 device (Router or Layer 3 Switch). |
| 2 | VDC has more feature than VRF and VLANs - There will be separate VRFs, Vlans, STP, HSRP, RIB Data Plane, configuration, administration functionality on each VDC. | There are only Logical separation of Routing Tables. |
| 3 | We can manage multiple logical devices in a single physical device. These logical switch behaves same like physical switch. Each logical switches have separate administration and operational capability. | There are no separate administrative and Management domain for each VRF. |
| 4 | You can reuse same VLAN in each VDC. | You cannot reuse same VLAN ID in each VRF. |
| 5 | Only Nexus 7K platform support the VDC. | All L3 devices support VRF. |
| 6 | If you want to enable VDC, then you will need Advance Services License. | IP base License in Routers and IP services in Catalyst Switches are enough to start VRF. |
| 7 | To perform internal VDC communication, we required an external connection need to be made between ports of VDC. | To perform internal VRF communication, we do not required an external connection. Internal VRF communication possible via route leaking. |
Hello and welcome to networktopic Blog. My name is Anubhav. I am a Senior Network Egineer. I have created this blog specially to serve interview questions and answer on Network Routing and Switching, I will try my best to serve correct and updated networking knowledge for you as per my corporate experience.
Thnx for this content its very useful for me thnx alot
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