D-Link DGS-3627G Product Manual - Page 74

xStack® DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch Layer 2 Protocol Tunneling Settings The Layer 2 Protocol Tunneling function supports traffic of multiple customers across service provider networks. BPDU Tunneling enables the BPDU's of the same customer's network to be multicast over specific VLANs in the service provider's network, which in turn will ensure the same geographically dispersed customer network can implement consistent spanning tree calculations across the service provider network. To view this window, click Administration > Layer 2 Protocol Tunneling Settings, as shown below: Figure 2- 61. Layer 2 Protocol Tunneling Settings window The following fields can be configured: Parameter Description Layer 2 Protocol Tunneling State Use the drop-down menu to Enable or Disable the Layer 2 Protocol Tunneling state. Unit Select the unit to configure. From/To Specify the ports on which the Layer 2 Protocol Tunneling will be enabled of disabled. Type Use the drop-down menu to select the configuration type. Tunnel - Specifies that the BPDU is received from a tunnel port, this packets DA will be replaced by a reserved multicast address and then sent out to a providers network through the uplink port. Uplink - Specifies that the port is a normal switch port which connects to the network provider. The encapsulated PDU received on the uplink port shall be terminated and the DA is replaced with the STP/GVRP MAC address, the packet is then sent to the tunnel port in the same VLAN. None - When selected an encapsulated PDU is received on a port and the forwarding behavior follows the forwarding of general multicast addresses. None is the default. STP/GVRP Select the type of tunnel multicast address to be applied to the ports either STP or GVRP. An STP enabled port can not be configured as an STP tunnel port. A GVRP enabled port can not be configured as a GVRP tunnel port. Click Apply to implement changes made. 58