Cisco Nexus 7000 Series - CHAPTER 14 Configuring Layer 3 Virtualization; Layer 3 Virtualization; Overview of Layer 3 Virtualization

CHAPTER
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Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
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Configuring Layer 3 Virtualization
This chapter describes how to configure Layer 3 virtualization.
This chapter includes the following sections:
• Layer 3 Virtualization, page 14-1
• Licensing Requirements for VRFs, page 14-5
• Prerequisites for VRF, page 14-6
• Guidelines and Limitations, page 14-6
• Configuring VRFs, page 14-6
• Verifying VRF Configuration, page 14-13
• VRF Example Configuration, page 14-13
• Related Topics, page 14-14
• Default Settings, page 14-14
• Default Settings, page 14-14
• Additional References, page 14-15
• Feature History for VRF, page 14-15
Layer 3 Virtualization
This section contains the following topics:
• Overview of Layer 3 Virtualization, page 14-1
• VRF and Routing, page 14-2
• VRF-Aware Services, page 14-3
Overview of Layer 3 Virtualization
Cisco NX-OS supports a hierarchy of virtualization that can divide the physical system resources into multi-
ple virtual device contexts (VDCs). Each VDC acts as a standalone device with both Layer 2 and Layer 3
services available. You can configure up to 4 VDCs, including the default VDC. See the Cisco NX-OS Virtu-
alization Configuration Guide for more information on VDCs.