Configuring Layer 3 Interfaces; Information About Layer 3 Interfaces; Routed Interfaces - Cisco Nexus 3548 Configuration Manual

Configuring Layer 3 Interfaces

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Information About Layer 3 Interfaces

Layer 3 interfaces forward 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.

Routed Interfaces

You can configure a port as a Layer 2 interface or a Layer 3 interface. A routed interface is a physical port
that can route IP traffic to another device. A routed interface is a Layer 3 interface only and does not support
Layer 2 protocols, such as the Spanning Tree Protocol (STP).
All Ethernet ports are Layer 2 (switchports) by default. You can change this default behavior using the no
switchport command from interface configuration mode. To change multiple ports at one time, you can
specify a range of interfaces and then apply the no switchport command.
You can assign an IP address to the port, enable routing, and assign routing protocol characteristics to this
routed interface.
You can also create a Layer 3 port channel from routed interfaces.
Routed interfaces and subinterfaces support exponentially decayed rate counters. Cisco NX-OS tracks the
following statistics with these averaging counters:
• Input packets/sec
Information About Layer 3 Interfaces, on page 25
Licensing Requirements for Layer 3 Interfaces, on page 27
Guidelines and Limitations for Layer 3 Interfaces, on page 27
Default Settings for Layer 3 Interfaces, on page 28
Configuring Layer 3 Interfaces, on page 28
Verifying the Layer 3 Interfaces Configuration, on page 34
Monitoring Layer 3 Interfaces, on page 35
Configuration Examples for Layer 3 Interfaces, on page 35
Related Documents for Layer 3 Interfaces, on page 36
MIBs for Layer 3 Interfaces, on page 36
Standards for Layer 3 Interfaces, on page 37
Cisco Nexus 3548 Switch NX-OS Interfaces Configuration Guide, Release 9x
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