3-4Note:z The BPDU Tunnel is unavailable to all the ports of a device if the device has the fabric featureenabled on one of its ports.z If BPDU tunnel transparent transmission is enabled for packets of a protocol, the protocol cannotbe enabled on the port. For example, if you execute the bpdu-tunnel lacp command, the lacpenable command cannot be executed on the port.z The bpdu-tunnel stp command is mutually exclusive with the vlan-vpn tunnel command. Refer toMSTP part of this manual for details.z To enable BPDU tunnel transmission for PAGP packets, LACP packets and UDLD packets, makesure that the links the service provider provides are point-to-point links. Otherwise, these protocolscannot operate properly.z Because the NDP configuration and NTDP configuration cannot be synchronized to ports in anaggregation group, make sure that NDP and NTDP are not enabled on any port in an aggregationgroup before enabling the service provider network to use aggregation group to transmit HGMPpackets through BPDU tunnels.z The bpdu-tunnel cdp command is mutually exclusive with the voice vlan legacy command.Refer to Voice VLAN part of this manual for details.z If a BPDU-tunnel-enabled port receives a tunnel packet from the customer’s network, errors occurin the network and the tunnel packet will be dropped directly.Displaying and Maintaining BPDU Tunnel ConfigurationTo do... Use the command... RemarksDisplay the private multicast MACaddress used by the tunnel packets display bpdu-tunnel Available in any viewBPDU Tunnel Configuration ExampleTransmitting STP Packets Through a TunnelNetwork requirementsz Customer1 and Customer2 are devices operating in a customer network; Provider1 and Provider2are edge devices operating in the service provider network. The two devices receive data from thecustomer network by using Ethernet1/0/1 and Ethernet1/0/2 respectively.z Provider1 and Provider2 are connected through trunk links, which permit packets of all VLANs.z Enable the service provider network to transmit STP packets of the customer network throughBPDU tunnel. The destination MAC address for tunnel packets is 010f-e233-8b22.z Enable the VLAN-VPN feature for the service provider network, and enable the service providernetwork to use VLAN 100 to transmit data packets of the customer network.
