Cisco N7K-C7010 Configuration Guide - Page 109

Send document comments to [email protected] 4 C H A P T E R Configuring Layer 3 Interfaces This chapter describes how to configure Layer 3 interfaces for Cisco NX-OS devices This chapter includes the following sections: • Information About Layer 3 Interfaces, page 4-1 • Licensing Requirements for Layer 3 Interfaces, page 4-5 • Guidelines and Limitations, page 4-5 • Default Settings, page 4-6 • Prerequisites for Layer 3 Interfaces, page 4-5 • Configuring Layer 3 Interfaces, page 4-6 • Verifying the Layer 3 Interfaces Configuration, page 4-16 • Monitoring Layer 3 Interfaces, page 4-17 • Configuration Examples for Layer 3 Interfaces, page 4-18 • Related Topics, page 4-18 • Additional References, page 4-18 • Feature History for Configuring Layer 3 Interfaces, page 4-19 Information About Layer 3 Interfaces Layer 3 interfaces forward IPv4 and IPv6 packets to another device using static or dynamic routing protocols. You can use Layer 3 interfaces for IP routing and inter-VLAN routing of Layer 2 traffic. You cannot configure a shared interface as a Layer 3 interface. See the Cisco NX-OS FCoE Configuration Guide for Cisco Nexus 7000 and Cisco MDS 9500 for information on shared interfaces. Beginning with Cisco Release 5.2(1), you can configure a Fabric Extender (FEX) port as a Layer 3 interface for host connectivity, but not for routing. See the Configuring the Cisco Nexus 2000 Series Fabric Extender for more information on fabric extenders. This section includes the following topics: • Routed Interfaces, page 4-2 • Subinterfaces, page 4-2 • VLAN Interfaces, page 4-3 • Loopback Interfaces, page 4-4 OL-23435-03 Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x 4-1