Bpdu Tunnel Features Supported By The S9300; Figure 9-3 Networking Of Port-Based Bpdu Tunnels - Huawei Quidway S9300 Configuration Manual

9 BPDU Tunnel Configuration
To meet the preceding conditions, you can configure BPDU tunnels on the network devices on
the PSN of the ISP. The BPDU tunnels then transparently transmit BPDUs between branches
of different user networks.

9.2 BPDU Tunnel Features Supported by the S9300

This section describes the BPDU tunnel features supported by the S9300.
The S9300 supports the following BPDU tunnels:
l
l
l
This section describes the preceding BPDU tunnels.
Port-based BPDU Tunnel

Figure 9-3 Networking of port-based BPDU tunnels

As shown in
networks connected to the same PE belong to different LANs, namely, LAN-A and LAN-B.
BPDUs sent from user networks are not tagged. A PE device needs to identify the LAN that a
received BPDU belongs to. BPDUs of a user network in LAN-A must be forwarded to other
user networks in LAN-A, but cannot be forwarded to user networks in LAN-B. In addition,
BPDUs cannot be processed by the network devices of the ISP.
One solution to the port-based BPDU tunnel is to configure different roles for the devices of the
ISP and user networks.
9-4
Port-based BPDU tunnel
VLAN-based BPDU tunnel
QinQ-based BPDU tunnel
LAN-B
MSTP
PE1
Port based
VLAN 300
LAN-A
MSTP
Figure 9-3, each port of a PE device is connected to one user network. The user
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Port based
VLAN 200
ISP Network
BPDU Tunnel 200
BPDU Tunnel 300
PE3
LAN-B
MSTP
Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet
Port based
VLAN 200
PE2
Port based
VLAN 300
Port based
VLAN 200
Issue 03 (2009-08-20)
LAN-B
MSTP
LAN-A
MSTP