Cisco N7K-C7010 Configuration Guide - Page 113
Virtualization Support, Licensing Requirements for Layer 3 Interfaces
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Chapter 4 Configuring Layer 3 Interfaces Licensing Requirements for Layer 3 Interfaces Send document comments to [email protected] Virtualization Support Layer 3 interfaces support Virtual Routing and Forwarding instances (VRFs). VRFs exist within virtual device contexts (VDCs). By default, Cisco NX-OS places you in the default VDC and default VRF unless you specifically configure another VDC and VRF. A Layer 3 logical interface (VLAN interface, loopback) configured in one VDC is isolated from a Layer 3 logical interface with the same number configured in another VDC. For example, loopback 0 in VDC 1 is independent of loopback 0 in VDC 2. You can configure up to 1024 loopback interfaces per VDC. You can associate the interface with a VRF. For VLAN interfaces, you must configure the VLAN interface in the same VDC as the VLAN. See the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide, Release 5.x, for information about VDCs and see the Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 5.x, for information about configuring an interface in a VRF. Note You must assign an interface to a VRF before you configure the IP address for that interface. Licensing Requirements for Layer 3 Interfaces The following table shows the licensing requirements for this feature: Product Cisco NX-OS License Requirement Layer 3 interfaces require no license. Any feature not included in a license package is bundled with the Cisco NX-OS system images and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide. Prerequisites for Layer 3 Interfaces Layer 3 interfaces have the following prerequisites: • You have installed the Advanced Services license and entered the desired VDC (see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide, Release 5.x, if you are configuring VDCs. • You are familiar with IP addressing and basic configuration. See the Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 5.x, for more information on IP addressing. Guidelines and Limitations Layer 3 interfaces have the following configuration guidelines and limitations: • If you change a Layer 3 interface to a Layer 2 interface, Cisco NX-OS shuts down the interface, reenables the interface, and removes all configuration specific to Layer 3. • If you change a Layer 2 interface to a Layer 3 interface, Cisco NX-OS shuts down the interface, reenables the interface, and deletes all configuration specific to Layer 2. OL-23435-03 Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x 4-5