Service Provider Bridging | 953Configure VLAN StackingConfiguring VLAN-Stacking is a three-step process:1. Create access and trunk ports. See page 953.2. Assign access and trunk ports to a VLAN. See page 954.3. Make the VLAN VLAN-stacking capable.Related Configuration Tasks• Configure the Protocol Type Value for the Outer VLAN Tag on page 954• FTOS Options for Trunk Ports on page 955• VLAN Stacking in Multi-vendor Networks on page 956Create Access and Trunk PortsAn access port is a port on the service provider edge that directly connects to the customer. An access portmay belong to only one service provider VLAN.A trunk port is a port on a service provider bridge that connects to another service provider bridge and isa member of multiple service provider VLANs.Physical ports and port-channels can be access or trunk ports.Figure 46-2. Access and Trunk PortsTo create access and trunk ports:Step Task Command Syntax Command Mode1 Assign the role of access port to a Layer 2 port on a providerbridge that is connected to a customer.vlan-stack access INTERFACE2 Assign the role of trunk port to a Layer 2 port on a providerbridge that is connected to another provider bridge.vlan-stack trunk INTERFACE3 Assign all access ports and trunk ports to service providerVLANs.member INTERFACE VLANCustomer 1 - VLAN 10Customer 2 - VLAN 20Customer 3 - VLAN 30Customer 1Customer 2Customer 3Access Ports Trunk Port Access PortsVLAN-Stack TrunkVLANs 10, 20, 30
