Customer Bridge Mode

The default mode for bridging and routing of external (customer) VLANs through an Extreme Networks S- K- and 7100-Series switch is called Customer Bridging. In a customer bridge, all packets are bridged and routed based on the VLAN identified in the C-TAG. Routing through and egress from the network must be configured on a per-VLAN basis, so there must be a VLAN configured for each VLAN passing through the switch.