Configuration Guide User guide

788 FastIron Configuration Guide
53-1002494-02
IP subnet address on multiple port-based VLAN configuration
In this example, 24 ports on a 10/100 module and two Gbps ports on a Gbps module are added to
port-based VLAN 10. The two Gbps ports are then configured as uplink ports.
IP subnet address on multiple port-based VLAN
configuration
For a Brocade 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 Brocade 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 “VLAN groups and virtual routing
interface group” on page 791. You might be able to achieve the results you want using the methods
in that section instead.
Figure 84 shows an example of this type of configuration.
FIGURE 84 Multiple port-based VLANs with separate protocol addresses
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 85.
VLAN 2
VLAN 3
VLAN 4
FSX 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