Users Guide

Layer 3 Routing Commands 1519
Enable IPv4 routing on a VLAN by entering interface vlan mode for the
desired VLAN and assigning an IP address to the VLAN. Use the no interface
vlan command to disable routing on an interface. Ensure that statically
assigned addresses do not conflict with any configured subnets. Subnet
overlap is not allowed.
Virtual Router Configuration mode is only available on the
N3000/N3100/N4000 switches.
Example
The following example enables IPv4 routing for VLAN 15
console(config)#vlan 15
console(config-vlan15)#interface vlan 15
console(config-if-vlan15)#ip address 10.0.3.2 /8
console(config-if-vlan15)#exit
console(config)#ip routing
ip unnumbered
This command is used to identify an interface as an unnumbered interface
and specify the numbered interface providing the borrowed address. The
numbered interface must be a loopback interface. To stop borrowing an
address, use the no form of the command.
Syntax
ip unnumbered loopback loopback-id
no ip unnumbered
• loopback-id—The loopback identifier (Range 0–7)
Default Configuration
The are no ip unnumbered interfaces by default.
Command Mode
Interface (VLAN) Configuration
User Guidelines
IP unnumbered interfaces are supported in the default VRF only.