DELL N3000 User Manual

Configuring Routing Interfaces

This chapter describes the routing (layer 3) interfaces the Dell Networking 

series switches support, which includes VLAN routing interfaces, loopback 

interfaces, and tunnel interfaces.
The topics covered in this chapter are:

• Routing Interface Overview
• Default Routing Interface Values
• Configuring Routing Interfaces (Web)
• Configuring Routing Interfaces (CLI)

For information about configuring IPv6 characteristics on routing interfaces, 

see "Configuring IPv6 Routing" on page 1241.
For configuration examples that configure VLAN routing interfaces, see "IP 

Routing Configuration Example" on page 1084 in the Configuring IP Routing 

chapter. For a configuration example that includes tunnel and loopback 

interface creation, see "Interconnecting an IPv4 Backbone and Local IPv6 

Network" on page 1187.

Routing interfaces are logical interfaces that can be configured with an IP 

address. Routing interfaces provide a means of transmitting IP packets 

between subnets on the network.

VLANs divide a single physical network (broadcast domain) into separate 

logical networks. To forward traffic across VLAN boundaries, a layer 3 device, 

such as router, is required. Dell Networking series switches can act as layer 3 

devices when you configure VLAN routing interfaces. VLAN routing 

interfaces make it possible to transmit traffic between VLANs while still 

containing broadcast traffic within VLAN boundaries. The configuration of 

VLAN routing interfaces makes inter-VLAN routing possible.