Cisco SR224T Administration Guide - Page 157

VLAN Management VLANs 12 • Management VLAN: For more information refer to the Configuring IP Information section. QinQ QinQ provides isolation between service provider networks and customers' networks. The switch is a provider bridge that supports port-based c-tagged service interface. With QinQ, the switch adds an ID tag known as Service Tag (S-tag) to forward traffic over the network. The S-tag is used to segregate traffic between various customers, while preserving the customer VLAN tags. Customer traffic is encapsulated with an S-tag with TPID 0x8100, regardless of whether it was originally c-tagged or untagged. The S-tag allows this traffic to be treated as an aggregate within a provider bridge network, where the bridging is based on the S-tag VID (S-VID) only. The S-Tag is preserved while traffic is forwarded through the network service provider's infrastructure, and is later removed by an egress device. An additional benefit of QinQ is that there is no need to configure customers' edge devices. QinQ is enabled in the VLAN Management > Interface Settings page. VLAN Configuration Workflow To configure VLANs: 1. If required, change the default VLAN by using the Configuring Default VLAN Settings section. 2. Create the required VLANs by using the Creating VLANs section. 3. Set the desired VLAN-related configuration for ports and enable QinQ on an interface using the Configuring VLAN Interface Settings section. 4. Assign interfaces to VLANs by using the Configuring Port to VLAN section or the Configuring VLAN Membership section. 5. View the current VLAN port membership for all the interfaces in the Configuring VLAN Membership section. Cisco Small Business 200 Series Smart Switch Administration Guide 158