Brocade TurboIron 24X Series Configuration Guide - Manual (Page 428)

394 Brocade TurboIron 24X Series Configuration Guide
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Configuring the same IP subnet address on multiple port-based VLANs
• If the destination is in the same VLAN as the source, the device does not need to perform a
proxy ARP.
To configure multiple VLANs to use the same IP subnet address:
• Configure each VLAN, including adding tagged or untagged ports.
• Configure a separate virtual routing interface for each VLAN, but do not add an IP subnet
address to more than one of the virtual routing interfaces.
• Configure the virtual routing interfaces that do not have the IP subnet address to “follow” the
virtual routing interface that does have the address.
To configure the VLANs shown in Figure 47 , you could enter the following commands.
TurboIron(config)#vlan 1 by port
TurboIron(config-vlan-1)#untag ethernet 1
TurboIron(config-vlan-1)#tag ethernet 8
TurboIron(config-vlan-1)#router-interface ve 1
Syntax: router-interface ve <number>
The commands above configure port-based VLAN 1. The VLAN has one untagged port (1) and a
tagged port (8). In this example, all three VLANs contain port 8 so the port must be tagged to allow
the port to be in multiple VLANs. You can configure VLANs to share a Layer 3 protocol interface
regardless of tagging. A combination of tagged and untagged ports is shown in this example to
demonstrate that sharing the interface does not change other VLAN features.
Notice that each VLAN still requires a unique virtual routing interface.
The following commands configure port-based VLANs 2 and 3.
TurboIron(config-vlan-1)#vlan 2 by port
TurboIron(config-vlan-2)#untag ethernet 2
TurboIron(config-vlan-2)#tag ethernet 8
TurboIron(config-vlan-2)#router-interface ve 2
TurboIron(config-vlan-2)#vlan 3 by port
TurboIron(config-vlan-3)#untag ethernet 5 to 6
TurboIron(config-vlan-3)#tag ethernet 8
TurboIron(config-vlan-3)#router-interface ve 3
The following commands configure an IP subnet address on virtual routing interface 1.
TurboIron(config-vlan-3)#interface ve 1
TurboIron(config-vif-1)#ip address 10.0.0.1/24
The following commands configure virtual routing interfaces 2 and 3 to “follow” the IP subnet
address configured on virtual routing interface 1.
TurboIron(config-vif-1)#interface ve 2
TurboIron(config-vif-2)#ip follow ve 1
TurboIron(config-vif-2)#interface ve 3
TurboIron(config-vif-3)#ip follow ve 1
NOTE
Since virtual routing interfaces 2 and 3 do not have their own IP subnet addresses but instead are
“following” virtual routing interface a IP address, you still can configure an IPX or AppleTalk interface
on virtual routing interfaces 2 and 3.