Configuring A Port-Based Bpdu Tunnel; Establishing The Configuration Task - Huawei Quidway S9300 Configuration Manual

9 BPDU Tunnel Configuration

9.3 Configuring a Port-based BPDU Tunnel

This section describes how to configure a port-based BPDU tunnel.

9.3.1 Establishing the Configuration Task

9.3.2 Enabling Spanning Tree Calculation on the PE and CE
Do as follows on the PE and CE devices.
9.3.3 Adding a PE Interface to a VLAN
Do as follows on the PE devices.
9.3.4 Configuring a Port-based BPDU Tunnel
9.3.5 Configuring a PE Interface at the PSN Side to Forward BPDUs with the Specified VLAN
Tags
Do as follows on the PE devices.
9.3.6 Checking the Configuration
9.3.1 Establishing the Configuration Task
Applicable Environment
If each user-side PE interface is connected to only one CE device and if BPDUs sent from user
networks do not contain VLAN tags, you can configure port-based BPDU tunnels to realize
9-8
BPDU tunnel. To save VLAN IDs, you can configure the QinQ-based BPDU tunnel to
forward BPDUs on the ISP network.
As shown in Figure 9-6, VLAN-based BPDU tunnels are configured on the convergence
ports of the PE devices. The PE devices add an outer tag to each BPDU sent from a CE
device according to the VLAN ID of the CE device.
1. Add CE interfaces connected to PE devices to VLANs and configure the BPDUs sent
from each CE interface to contain the VLAN tag of this port.
2. Enable the BPDU tunnel function and the QinQ function on the incoming ports (on
the PE or UPE devices) of the Layer 2 switching network.
3. The convergence incoming port of the PE adds an outer tag, that is, the VLAN ID of
the public network, to a BPDU sent from a user network according to the VLAN ID
of the user network.
4. The PE devices select different BPDU tunnels according to outer tags of BPDUs to
transmit BPDUs on the public network.
5. Enable the BPDU tunnel function and the QinQ function on the outgoing ports (on
the PE or UPE devices) of the Layer 2 switching network.
6. The convergence outgoing port of a PE device removes the outer tags of BPDUs, and
selects the user networks to which BPDUs are transmitted according to the inner
VLAN ID.
As shown in Figure 9-6, when a PE device receives BPDUs with inner tags 100-199, the
PE device adds outer tag 20 to the BPDUs, and then forwards the BPDUs on the ISP
network. When the PE device receives BPDUs with inner tags 200-299, the PE devices add
outer tag 30 to the BPDUs, and then forwards the BPDUs on the ISP network. In this
manner, BPDUs of different user networks are transparently transmitted on the ISP network
and VLAN IDs of the ISP are saved.
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Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet
Issue 03 (2009-08-20)