Quick Reference Guide

344 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
VLAN names
12
VLAN names
The show vlans command lists VLANs created by GVRP as “GVRP_VLAN_<vlan-id>”. VLAN names
for statically configured VLANs are not affected. To distinguish between statically-configured VLANs
that you add to the device and VLANs that you convert from GVRP-configured VLANs into
statically-configured VLANs, the show vlans command displays a converted VLAN name as
“STATIC_VLAN_<vlan-id>”.
Configuration notes
• If you disable GVRP, all GVRP configuration information is lost if you save the configuration
change (write memory command) and then reload the software. However, if you reload the
software without first saving the configuration change, the GVRP configuration is restored
following a software reload.
• The maximum number of VLANS supported on a device enabled for GVRP is the same as the
maximum number on a device that is not enabled for GVRP.
• To display the maximum number of VLANs allowed on your device, enter the show default
values command. See the “vlan” row in the System Parameters section. Make sure you
allow for the default VLAN (1), the GVRP base VLAN (4093), and the Single STP VLAN
(4094). These VLANs are maintained as “Registration Forbidden” in the GVRP database.
Registration Forbidden VLANs cannot be advertised or learned by GVRP.
• To increase the maximum number of VLANs supported on the device, enter the
system-max vlan <num> command at the global CONFIG level of the CLI, then save the
configuration and reload the software. The maximum number you can specify is listed in
the Maximum column of the show default values display.
• The default VLAN (VLAN 1) is not advertised by the Dell implementation of GVRP. The default
VLAN contains all ports that are not members of statically configured VLANs or VLANs enabled
for GVRP.
NOTE
The default VLAN has ID 1 by default. You can change the VLAN ID of the default VLAN, but only
before GVRP is enabled. You cannot change the ID of the default VLAN after GVRP is enabled.
• Single STP must be enabled on the device. The Dell implementation of GVRP requires Single
STP. If you do not have any statically configured VLANs on the device, you can enable Single
STP as follows.
PowerConnect(config)# vlan 1
PowerConnect(config-vlan-1)# exit
PowerConnect(config)# span
PowerConnect(config)# span single
These commands enable configuration of the default VLAN (VLAN 1), which contains all the
device ports, and enable STP and Single STP.
• All VLANs that are learned dynamically through GVRP are added to the single spanning tree.
• All ports that are enabled for GVRP become tagged members of the GVRP base VLAN (4093). If
you need to use this VLAN ID for another VLAN, you can change the GVRP VLAN ID. Refer to
“Changing the GVRP base VLAN ID” on page 345. The software adds the GVRP base VLAN to
the single spanning tree.
• All VLAN ports added by GVRP are tagged.