Reference Guide

Interfaces

You can congure and monitor physical interfaces (Ethernet), port-channels, and VLANs in L2 or L3 modes.

Table 1. Interface types

Interface type Supported / default mode Requires creation / default status

Ethernet (PHY) L2, L3 / unset No / no shutdown (enabled)

Management N/A No / no shutdown (enabled)

Loopback L3 / L3 Yes / no shutdown (enabled)

Port-channel L2, L3 / unset Yes / shutdown (disabled)

VLAN L2, L3 / L3 Yes (except default) / shutdown (disabled)

Enable Ethernet interfaces

Although all Ethernet port interfaces are enabled by default, you must use the no shutdown command to enable trac for a specic

congured Ethernet port interface. The shutdown command prevents all trac from passing through an Ethernet interface.

1 Enter an Ethernet port interface in CONFIGURATION mode.

interface ethernet node/slot/port[:subport]

2 Enable the Ethernet port interface in INTERFACE mode.

no shutdown

3 Save the conguration.

do commit

Enable Ethernet port interface

OS10(config)# interface ethernet 1/1/1

OS10(conf-if-eth1/1/1)# no shutdown

OS10(conf-if-eth1/1/1)# do commit

Disable Ethernet port interface

OS10(config)# interface ethernet 1/1/1

OS10(conf-if-eth1/1/1)# shutdown

OS10(conf-if-eth1/1/1)# do commit

L2 mode conguration

All physical, Ethernet and port-channel interfaces use a single MAC address and, by default, operate in L2 mode. From L2 mode, you can

congure switching and L2 protocols, such as VLANs and spanning-tree protocol (STP) on an interface.

You can enable L2 switching on a port interface in access or trunk mode. By default, an interface is enabled in access mode. Access mode

allows L2 switching of untagged trac on a single VLAN (VLAN 1 is the default). Trunk mode enables L2 switching of untagged trac on

the access VLAN, and tagged trac on multiple (two or more) VLANs.

64 Interfaces