Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 42)

28 Brocade Virtual ADX Switch and Router Guide
53-1003246-01
Overview
3
FIGURE 4 VLANs configured across multiple devices
Virtual routing interfaces
A virtual routing interface is a logical routing interface that Brocade Layer 3 Switches use to route
Layer 3 protocol traffic between protocol VLANs.
Brocade devices send Layer 3 traffic at Layer 2 within a VLAN. However, Layer 3 traffic from one
VLAN to another must be routed.
If you want the device to be able to send Layer 3 traffic from one VLAN to another, you must
configure a virtual routing interface on each VLAN, then configure routing parameters on the virtual
routing interfaces. For example, to enable a Layer 3 Switch to route IP traffic from one VLAN to
another, you must configure a virtual routing interface on each VLAN, then configure the
appropriate IP routing parameters on each of the virtual routing interfaces.
Figure 5 shows an example of IP subnet VLANs that use virtual routing interfaces for routing.