Dell PowerConnect FCS624S Configuration Guide - Page 511

Configuring the same IP subnet address on multiple port-based VLANs 13 Configuring the same IP subnet address on multiple port-based VLANs For a Dell PowerConnect device to route between port-based VLANs, you must add a virtual routing interface to each VLAN. Generally, you also configure a unique IP subnet address on each virtual routing interface. For example, if you have three port-based VLANs, you add a virtual routing interface to each VLAN, then add a separate IP subnet address to each virtual routing interface. The IP address on each of the virtual routing interfaces must be in a separate subnet. The Dell PowerConnect device routes Layer 3 traffic between the subnets using the subnet addresses. NOTE This feature applies only to Layer 3 Switches. NOTE Before using the method described in this section, refer to "Configuring VLAN groups and virtual routing interface groups" on page 472. You might be able to achieve the results you want using the methods in that section instead. Figure 99 shows an example of this type of configuration. FIGURE 99 Multiple port-based VLANs with separate protocol addresses VLAN 2 VLAN 3 VLAN 4 Switch VLAN 2 VE 1 -IP 10.0.0.1/24 VLAN 3 VE 2 -IP 10.0.1.1/24 VLAN 4 VE 3 -IP 10.0.2.1/24 As shown in this example, each VLAN has a separate IP subnet address. If you need to conserve IP subnet addresses, you can configure multiple VLANs with the same IP subnet address, as shown in Figure 100. PowerConnect B-Series FCX Configuration Guide 469 53-1002266-01