Understanding Nexus -- Part 10 -- L3 Interface Configs

Its time to have a glance at L3 interfaces now. You will see the configuration is same just like any L3 interface in IOS.

Routed Interface

All Ethernet ports are routed interfaces by default. You can assign an IP address to the port, enable routing, and assign routing protocol characteristics to this routed interface.

switch# configure terminal 

switch(config)# interface ethernet 2/1 

switch(config-if)# no switchport 

switch(config-if)# ip address 192.0.2.1/8 

Subinterfaces

 

Cisco NX-OS enables subinterfaces when the parent interface is enabled. You can shut down a subinterface independent of shutting down the parent interface. If you shut down the parent interface, Cisco NX-OS shuts down all associated subinterfaces as well.

The subinterface range is from 1 to 4094.

switch# configure terminal 

switch(config)# interface ethernet 2/1.1 

switch(config-if)# ip address 192.0.2.1/8 

switch(config-if)# encapsulation dot1Q 33 

Loopback Interfaces

You can configure up to 1024 loopback interfaces per VDC, numbered from 0 to 1023.

switch# configure terminal 

switch(config)# interface loopback 0 

switch(config-if)# ip address 192.0.2.100/8 

VLAN interface 

You must enable the VLAN network interface feature before you configure it.

switch# configure terminal

switch(config)# feature interface-vlan

switch(config)# interface vlan 10

switch(config-if)# ip address 192.0.2.1/8