Bridge Auto-Vlan-Containment - Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual

Alcatel-lucent omniswitch 6850-48: reference guide

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bridge auto-vlan-containment

Enables or disables Auto VLAN Containment (AVC). When enabled, AVC prevents a port that has no

VLANs mapped to an Multiple Spanning Tree Instance (MSTI) from becoming the root port for that

instance. Such ports are automatically assigned an infinite path cost value to make them an inferior choice

for root port.

bridge [msti msti_id] auto-vlan-containment {enable | disable}

Syntax Definitions

By default, automatic VLAN containment is disabled.

Platforms Supported

OmniSwitch 6400, 6850, 6850E, 6855, 9000E

Usage Guidelines

The AVC feature is not active for any MSTI until it is globally enabled. To globally enable this feature,

use the bridge auto-vlan-containment command but do not specify an msti_ id.

When AVC is globally enabled, it is active for all MSTIs. To disable AVC for a single instance, use the

disable form of this command and specify the msti_id for the instance.

Use the enable form of this command and specify an msti_id to enable AVC for an instance that was

previously disabled.

An administratively set port path cost takes precedence and prevents AVC configuration of the path

cost. The exception to this is if the port path cost is administratively set to zero, which resets the path

cost to the default value.

Note that when AVC is disabled that a port assigned to a VLAN not mapped to a specific instance can

become the root port for that instance and cause a loss of connectivity between other VLANs.

AVC does not have any effect on root bridges.

-> bridge auto-vlan-containment enable

-> bridge auto-vlan-containment disable

-> bridge msti 1 auto-vlan-containment disable

-> bridge msti 1 auto-vlan containment enable

Release History

Release 6.1.1; command introduced.

An existing MSTI ID number (0–4094).

Enables automatic VLAN containment.

Disables automatic VLAN containment.

Distributed Spanning Tree Commands

OmniSwitch CLI Reference Guide