Configuring VLAN Stacking Interaction With Other Features
OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008 page 6-11
Spanning Tree
• Spanning Tree is enabled by default for VLAN Stacking SVLANs. The Spanning Tree status for an
SVLAN is configurable in both the service-based and port-based VLAN Stacking modes. Note that the
SVLAN Spanning Tree status applies only to the service provider network topology.
• BPDU frames are tunneled by default. See “Configuring a UNI Profile” on page 6-24 and “Configur-
ing VLAN Stacking Ports” on page 6-27 for information about configuring service-based and port-
based VLAN Stacking to tunnel or discard Spanning Tree BPDU.
• See “Configuring VLAN Stacking Network Ports” on page 6-19 and “Configuring VLAN Stacking
Ports” on page 6-27 for information about configuring service-based and port-based VLAN Stacking
interoperability with legacy Spanning Tree BPDU systems.
• A back door link configuration is not supported. This occurs when there is a link between two
customer sites that are both connected to a VLAN Stacking provider edge switch.
• A dual home configuration is not supported. This type of configuration consists of a single customer
site connected to two different VLAN Stacking switches or two switches at a customer site connect to
two different VLAN Stacking switches.
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