Brocade TurboIron 24X Series Configuration Guide - Manual (Page 410)

376 Brocade TurboIron 24X Series Configuration Guide
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Routing between VLANs
There is a separate STP domain for each port-based VLAN. Routing occurs independently across
port-based VLANs or STP domains. You can define each end of each backbone link as a separate
tagged port-based VLAN. Routing will occur independently across the port-based VLANs. Because
each port-based VLAN STP domain is a single point-to-point backbone connection, you are
guaranteed to never have an STP loop. STP will never block the virtual router interfaces within the
tagged port-based VLAN, and you will have a fully routed backbone.
Dynamic port assignment (Layer 2 Switches
and Layer 3 Switches)
All Switch ports are dynamically assigned to any Layer 3 VLAN on Layer 2 Switches and any
non-routable VLAN on Layer 3 Switches. To maintain explicit control of the VLAN, you can explicitly
exclude ports when configuring any Layer 3 VLAN on a Layer 2 Switch or any non-routable Layer 3
VLAN on a Layer 3 Switch.
If you do not want the ports to have dynamic membership, you can add them statically. This
eliminates the need to explicitly exclude the ports that you do not want to participate in a particular
Layer 3 VLAN.
Assigning a different VLAN ID to the default VLAN
When you enable port-based VLANs, all ports in the system are added to the default VLAN. By
default, the default VLAN ID is “VLAN 1”. The default VLAN is not configurable. If you want to use
the VLAN ID “VLAN 1” as a configurable VLAN, you can assign a different VLAN ID to the default
VLAN.
To reassign the default VLAN to a different VLAN ID, enter the following command.
TurboIron(config)#default-vlan-id 4095
Syntax: [no] default-vlan-d <vlan-id>
You must specify a valid VLAN ID that is not already in use. For example, if you have already defined
VLAN 10, do not try to use “10” as the new VLAN ID for the default VLAN. Valid VLAN IDs are
numbers from 1 – 4095.
NOTE
Changing the default VLAN name does not change the properties of the default VLAN. Changing the
name allows you to use the VLAN ID “1” as a configurable VLAN.
Assigning different VLAN IDs to reserved VLANs 4091 and 4092
VLAN 4094 is reserved for use by Single STP. If you want to use VLANs 4091 and 4092 as
configurable VLANs, you can assign them to different VLAN IDs.
For example, to reassign reserved VLAN 4091 to VLAN 10, enter the following commands.
TurboIron(config)#reserved-vlan-map vlan 4091 new-vlan 10
Reload required. Please write memory and then reload or power cycle.
TurboIron(config)#write mem
TurboIron(config)#exit
TurboIron#reload