Operation Manual - STP
Quidway S3500 Series Ethernet Switches Chapter 2 BPDU Tunnel Configuration
Huawei Technologies Proprietary
2-1
Chapter 2 BPDU Tunnel Configuration
2.1 BPDU Tunnel Overview
Bridge protocol data unit (BPDU) Tunnel enables geographically distributed user
network to transmit BPDU packets transparently over the specified VLAN VPN on the
operator’s network. This allows the user networks to participate in a uniform spanning
tree calculation while maintaining a separate spanning tree from the operator network.
As shown in Figure 2-1, the upper part is the operator’s network, and the lower part is
the user network. The operator’s network comprises packet ingress/egress devices,
and the user network has networks A and B. On the operator’s network, configure the
arriving BPDU packets at the ingress to have MAC addresses in a special format, and
reconvert them back to their original formats at the egress. This is how transparent
transmission is implemented on the operator’s network.
Network BNetwork A
Network
Network BNetwork A
Network
Packet ingress/egress
device
Packet ingress/egress
device
Network BNetwork A
Network
Network BNetwork A
Network
Operator’ s Network
User
Packet ingress/egress
device
Packet ingress/egress
device
Network
Network BNetwork A
Network
Network BNetwork A
Network
Packet ingress/egress
device
Packet ingress/egress
device
Network BNetwork A
Network
Network BNetwork A
Network
Operator’ s Network
User
Packet ingress/egress
device
Packet ingress/egress
device
Network
Figure 2-1 BPDU Tunnel network hierarchy
2.2 BPDU Tunnel Configuration
BPDU Tunnel configuration tasks are described in the following table:
Table 2-1 BPDU Tunnel configuration
Configuration item Command View Description
Enable BPDU Tunnel
of the system.
vlan-vpn
tunnel
System
view
Required in BPDU Tunnel
configuration
Enable VLAN VPN
on the Ethernet port.
vlan-vpn
enable
Ethernet
port view
Required in VLAN VPN
configuration
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