Operation Manual – VLAN-VPN
H3C S3100 Series Ethernet Switches Chapter 4
BPDU Tunnel Configuration
4-5
 Note:
z If BPDU tunnel transparent transmission is enabled for packets of a protocol, the
protocol cannot be enabled on the port. For example, if you execute the
bpdu-tunnel lacp command, the lacp enable command cannot be executed on the
port.
z The bpdu-tunnel stp command is mutually exclusive with the vlan-vpn tunnel
command. Refer to MSTP part of this manual for details.
z To enable BPDU tunnel transmission for PAGP packets, LACP packets and UDLD
packets, make sure that the links the service provider provides are point-to-point
links. Otherwise, these protocols cannot operate properly.
z Because the NDP configuration and NTDP configuration cannot be synchronized to
ports in an aggregation group, make sure that NDP and NTDP are not enabled on
any port in an aggregation group before enabling the service provider network to
use aggregation group to transmit HGMP packets 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 occur in the network and the tunnel packet will be dropped directly.
4.3 Displaying and Maintaining BPDU Tunnel Configuration
To do... Use the command... Remarks
Display the private
multicast MAC address
used by the tunnel
packets
display bpdu-tunnel
Available in any view
4.4 BPDU Tunnel Configuration Example
4.4.1 Transmitting STP Packets Through a Tunnel
I. Network requirements
z Customer1 and Customer2 are devices operating in a customer network;
Provider1 and Provider2 are edge devices operating in the service provider
network. The two devices receive data from the customer 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.
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