Alcatel-Lucent OmniSwitch 6250, Cli Reference Manual, Page: 804 / 2018

VLAN Management Commands
page 22-4 OmniSwitch 6250 CLI Reference Guide November 2009
vlan stp
Enables or disables the Spanning Tree status for a VLAN.
vlan vid [1x1 | flat] stp {enable | disable}
Syntax Definitions
vid A VLAN ID number (1–4094).
1x1 Specifies that the Spanning Tree status for the VLAN applies when the
switch is running in the 1x1 Spanning Tree mode.
flat Specifies that the Spanning Tree status for the VLAN applies when the
switch is running in the flat Spanning Tree mode.
enable Enables Spanning Tree for the specified VLAN.
disable Disables Spanning Tree for the specified VLAN.
Defaults
By default, the Spanning Tree status is enabled in both the 1x1 and flat mode when the VLAN is created.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
STP is not active until at least one active port is assigned to the VLAN.
•
If the vid specified is that of a VLAN that does not exist, the VLAN is automatically created.
•
Note that specifying multiple VLAN ID entries and/or a range of VLAN IDs on the same command
line is allowed. Use a hyphen to indicate a contiguous range and a space to separate multiple VLAN ID
entries (e.g., vlan 10-15 500-510 850 stp enable).
•
Use the optional 1x1 or flat parameter with this command to configure the Spanning Tree status only
for the Spanning Tree mode specified by the parameter. For example, if the flat parameter is specified
when disabling STP for VLAN 10, then the Spanning Tree status for VLAN 10 is disabled when the
switch is running in the flat mode. However, the current Spanning Tree status for VLAN 10 in the 1x1
mode remains unchanged.
•
If this command is used without specifying the 1x1 or flat parameter, then the Spanning Tree status for
the specified VLAN is changed for both operating modes.
•
Up to 252 Spanning Tree instances per switch are supported in the 1x1 Spanning Tree mode. Since
each VLAN with Spanning Tree enabled uses one of these instances, only 252 VLANs can have an
active Spanning Tree instance at any given time.
•
To create more than 252 VLANs in the 1x1 Spanning Tree mode, use the vlan stp disable , vlan 1x1
stp disable , or vlan flat stp disable command to create a VLAN with Spanning Tree disabled.