Figure syntax – Brocade TurboIron 24X Series Configuration Guide User Manual

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Brocade TurboIron 24X Series Configuration Guide

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Routing between VLANs using virtual routing interfaces (Layer 3 Switches only)

4. To permanently assign ports 1 – 12 and port 25 to IPX network 1 VLAN, enter the following

commands.

TurboIron(config-ip-subnet)#ipx-network 1 ethernet_802.3 name Blue

TurboIron(config-ipx-network)#no dynamic

TurboIron(config-ipx-network)#static ethernet 1 to 12 ethernet 25

TurboIron(config-ipx-network)#

5. To permanently assign ports 12 – 25 to Appletalk VLAN, enter the following commands.

TurboIron(config-ipx-proto)#atalk-proto name Red

TurboIron(config-atalk-proto)#no dynamic

TurboIron(config-atalk-proto)#static ethernet 13 to 25

TurboIron(config-atalk-proto)#end

TurboIron#write memory

TurboIron#

Syntax: ip-subnet [name ]

Syntax: ipx-network netbios-allow |

netbios-disallow
[name ]

exclude | dynamic ethernet [to ] [name ]

Routing between VLANs using virtual routing
interfaces (Layer 3 Switches only)

Layer 3 Switches offer the ability to create a virtual routing interface within a Layer 2 STP
port-based VLAN or within each Layer 3 protocol, IP subnet, or IPX network VLAN. This combination
of multiple Layer 2 or Layer 3 broadcast domains, or both, and virtual routing interfaces are the
basis for a very powerful Integrated Switch Routing (ISR) technology. ISR is very flexible and can
solve many networking problems. The following example is meant to provide ideas by
demonstrating some of the concepts of ISR.

Example

Suppose you want to move routing out to each of three buildings in a network. Remember that the
only protocols present on VLAN 2 and VLAN 3 are IP and IPX. Therefore, you can eliminate tagged
ports 25 and 26 from both VLAN 2 and VLAN 3 and create new tagged port-based VLANs to
support separate IP subnets and IPX networks for each backbone link.

You also need to create unique IP subnets and IPX networks within VLAN 2 and VLAN 3 at each
building. This will create a fully routed IP and IPX backbone for VLAN 2 and VLAN 3. However, VLAN
4 has no protocol restrictions across the backbone. In fact there are requirements for NetBIOS and
DecNet to be bridged among the three building locations. The IP subnet and IPX network that exists
within VLAN 4 must remain a flat Layer 2 switched STP domain. You enable routing for IP and IPX
on a virtual routing interface only on device-A. This will provide the flat IP and IPX segment with
connectivity to the rest of the network. Within VLAN 4 IP and IPX will follow the STP topology. All
other IP subnets and IPX networks will be fully routed and have use of all paths at all times during
normal operation.

Figure 45

shows the configuration described above.