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•
This limitation becomes relevant if you enable the port as a multi-purpose port (carrying single-tagged
and double-tagged traffic).
•
When the LP ports are present in RPM 10 and 11, VLAN stacking is supported.
•
VLAN stacking is supported on C9010 ports but not on peGigE ports.
Configure VLAN Stacking
Configuring VLAN-Stacking is a three-step process.
1
Creating Access and Trunk Ports
2
Assign access and trunk ports to a VLAN
3
Enabling VLAN-Stacking for a
Related Configuration Tasks
•
Configuring the Protocol Type Value for the Outer VLAN Tag
•
Configuring Options for Trunk Ports
•
Debugging VLAN Stacking
•
VLAN Stacking in Multi-Vendor Networks
Creating Access and Trunk Ports
To create access and trunk ports, use the following commands.
•
Access port — a port on the service provider edge that directly connects to the customer. An access
port may belong to only one service provider VLAN.
•
Trunk port — a port on a service provider bridge that connects to another service provider bridge and is
a member of multiple service provider VLANs.
Physical ports and port-channels can be access or trunk ports.
1
Assign the role of access port to a Layer 2 port on a provider bridge that is connected to a customer.
INTERFACE mode
vlan-stack access
2
Assign the role of trunk port to a Layer 2 port on a provider bridge that is connected to another provider
bridge.
INTERFACE mode
vlan-stack trunk
3
Assign all access ports and trunk ports to service provider VLANs.
INTERFACE VLAN mode
member
Example of Displaying the VLAN-Stack Configuration for a Switchport
To display the VLAN-Stacking configuration for a switchport, use the show config command from
INTERFACE mode.
(Creating Access and Trunk
VLAN.
Ports).
Service Provider Bridging
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Troubleshooting
