Dell Networking OS Behavior: In Dell Networking OS versions prior to 8.2.1.0, the MAC address that Dell Networking systems use tooverwrite the Bridge Group Address on ingress was non-configurable. The value of the L2PT MAC address was the Dell Networking-uniqueMAC address, 01-01-e8-00-00-00. As such, with these Dell Networking OS versions, Dell Networking systems are required at the egressedge of the intermediate network because only Dell Networking OS could recognize the significance of the destination MAC address andrewrite it to the original Bridge Group Address. In Dell Networking OS version 8.2.1.0 and later, the L2PT MAC address is user-configurable,so you can specify an address that non-Dell Networking systems can recognize and rewrite the address at egress edge.Figure 120. VLAN Stacking with L2PTImplementation Information• L2PT is available for STP, RSTP, MSTP, and PVST+ BPDUs.• No protocol packets are tunneled when you enable VLAN stacking.• L2PT requires the default CAM profile.Service Provider Bridging 849
