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Configuring VLAN Stacking
Interaction With Other Features
This section contains important information about VLAN Stacking interaction with other OmniSwitch
features. Refer to the specific chapter for each feature to get more detailed information about how to
configure and use the feature.
Link Aggregation
•
Both static and dynamic link aggregation are supported with VLAN Stacking.
•
Note that a link aggregate must consist of all UNI or all NNI ports. VLAN Stacking functionality is not
supported on link aggregates that consist of a mixture of VLAN Stacking ports and conventional
switch ports.
Quality of Service (QoS)
The QoS application has the following interactions with VLAN Stacking:
•
QoS allocates switch resources for VLAN Stacking Service attributes, even though such attributes are
not configurable via the QoS CLI.
•
VLAN Stacking ports are trusted and use 802.1p classification.
•
If there is a conflict between VLAN Stacking Service attributes and the QoS configuration, the VLAN
Stacking attributes are given precedence over QoS policies.
•
QoS applies the inner source vlan and inner 802.1p policy conditions to the CVLAN (inner) tag of
VLAN Stacking packets.
•
QoS applies the source vlan and 802.1p policy conditions to the SVLAN (outer) tag of VLAN Stack-
ing packets.
•
Quarantine Manager and Remediation (QMR) is not available if VLAN Stacking services or QoS
inner source vlan and inner 802.1p policies are configured on the switch.
Spanning Tree
•
Spanning Tree is automatically enabled for VLAN Stacking SVLANs. The Spanning Tree status for an
SVLAN is configurable through VLAN Stacking commands. Note that the SVLAN Spanning Tree
status applies only to the service provider network topology.
•
BPDU frames are tunneled by default. See
about configuring VLAN Stacking to tunnel or discard Spanning Tree BPDU.
•
See
"Configuring VLAN Stacking Network Ports" on page 27-13
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.
OmniSwitch AOS Release 7 Network Configuration Guide
"Configuring a UNI Profile" on page 27-19
for information about configuring
March 2011
Interaction With Other Features
for information
page 27-7
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