438 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
VLAN overview
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If you want the device to be able to send Layer 3 traffic from one protocol VLAN to another, you
must configure a virtual routing interface on each protocol VLAN, then configure routing
parameters on the virtual routing interfaces. For example, to enable a Layer 3 Switch to route IP
traffic from one IP subnet VLAN to another, you must configure a virtual routing interface on each IP
subnet VLAN, then configure the appropriate IP routing parameters on each of the virtual routing
interfaces.
Figure 91 shows an example of Layer 3 protocol VLANs that use virtual routing interfaces for
routing.
FIGURE 91 Use virtual routing interfaces for routing between Layer 3 protocol VLANs
User-configured port-based VLAN
User-configured protocol VLAN, IP sub-net VLAN,
IPX network VLAN, or AppleTalk cable VLAN
VE = virtual interface
(“VE” stands for “Virtual Ethernet”)
VE 1
VE 2
VE 3
VE 4
Layer 2 and Layer 3 traffic within a VLAN
is bridged at Layer 2.
Layer 3 traffic between protocol VLANs
is routed using virtual interfaces (VE).
To route to one another, each protocol
VLAN must have a virtual interface.
