Operation Manual – VLAN-VPNH3C S3100 Series Ethernet Switches Chapter 4 BPDU Tunnel Configuration4-5Note:z If BPDU tunnel transparent transmission is enabled for packets of a protocol, theprotocol cannot be enabled on the port. For example, if you execute thebpdu-tunnel lacp command, the lacp enable command cannot be executed on theport.z The bpdu-tunnel stp command is mutually exclusive with the vlan-vpn tunnelcommand. Refer to MSTP part of this manual for details.z To enable BPDU tunnel transmission for PAGP packets, LACP packets and UDLDpackets, make sure that the links the service provider provides are point-to-pointlinks. Otherwise, these protocols cannot operate properly.z Because the NDP configuration and NTDP configuration cannot be synchronized toports in an aggregation group, make sure that NDP and NTDP are not enabled onany port in an aggregation group before enabling the service provider network touse aggregation group to transmit HGMP packets through BPDU tunnels.z The bpdu-tunnel cdp command is mutually exclusive with the voice vlan legacycommand. Refer to Voice VLAN part of this manual for details.z If a BPDU-tunnel-enabled port receives a tunnel packet from the customer’snetwork, errors occur in the network and the tunnel packet will be dropped directly.4.3 Displaying and Maintaining BPDU Tunnel ConfigurationTo do... Use the command... RemarksDisplay the privatemulticast MAC addressused by the tunnelpacketsdisplay bpdu-tunnel Available in any view4.4 BPDU Tunnel Configuration Example4.4.1 Transmitting STP Packets Through a TunnelI. Network requirementsz Customer1 and Customer2 are devices operating in a customer network;Provider1 and Provider2 are edge devices operating in the service providernetwork. The two devices receive data from the customer network by usingEthernet1/0/1 and Ethernet1/0/2 respectively.z Provider1 and Provider2 are connected through trunk links, which permit packetsof all VLANs.
