Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 374)

For vlan-id , enter a valid VLAN ID that is not already in use. For example, if you have already defined
VLAN 20, do not try to use "20 as the new VLAN ID. Valid VLAN IDs are numbers from 1 - 4090, 4093,
and 4095. VLAN ID 4094 is reserved for use by the Single Spanning Tree feature.
Viewing reassigned VLAN IDs for reserved VLANs 4091 and 4092
To view the assigned VLAN IDs for reserved VLANs 4091 and 4092, use the show reserved-vlan-
map command. The reassigned VLAN IDs also display in the output of the show running-config and
show config commands.
The following shows example output for the show reserved-vlan-map command.
device # show reserved-vlan-map
Reserved Purpose Default Re-assign Current
CPU VLAN 4091 10 10
All Ports VLAN 4092 33 33
Syntax: show reserved-vlan-map
The following table defines the fields in the output of the show reserved-vlan-map command.
Output of the show reserved-vlan-map command TABLE 54
Field Description
Reserved Purpose Describes for what the VLAN is reserved. Note that the description is for Brocade internal
VLAN management.
Default The default VLAN ID of the reserved VLAN.
Re-assign The VLAN ID to which the reserved VLAN was reassigned. 1
Current The current VLAN ID for the reserved VLAN. 1
1. If you reassign a reserved VLAN without saving the configuration and reloading the software, the reassigned VLAN ID will display in
the Re-assign column. However, the previously configured or default VLAN ID will display in the Current column until the configuration is
saved and the device reloaded.
Assigning trunk group ports
When a "lead" trunk group port is assigned to a VLAN, all other members of the trunk group are
automatically added to that VLAN. A lead port is the first port of a trunk group port range; for example,
"1" in 1 - 4 or "5" in 5 - 8.
Enable spanning tree on a VLAN
The spanning tree bridge and port parameters are configurable using one CLI command set at the
Global Configuration Level of each Port-based VLAN. Suppose you want to enable the IEEE 802.1D
STP across VLAN 3. To do so, use the following method.
NOTE
When port-based VLANs are not operating on the system, STP is set on a system-wide level at the
global CONFIG level of the CLI.
Viewing reassigned VLAN IDs for reserved VLANs 4091 and 4092
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