Introduction To The Bpdu Tunnel; Figure 9-1 Format Of Bpdus - Huawei Quidway S9300 Configuration Manual

9 BPDU Tunnel Configuration

9.1 Introduction to the BPDU Tunnel

This section describes the concept of the BPDU tunnel.
Definition of the BPDU Tunnel
BPDUs are Layer 2 protocol packets. As shown in
format defined in IEEE802.3 and are transmitted in multicast mode.
BPDUs are usually used to transmit the STP information. The path used to transparently transmit
BPDUs on an Internet service provider (ISP) network is called a Layer 2 protocol tunnel or a
BPDU tunnel.
The S9300 can transmit packets of the following protocols:
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In this manual, the commonly used STP protocol is used as an example.

Figure 9-1 Format of BPDUs

0
9-2
Spanning Tree Protocol (STP)
Link Aggregation Control Protocol (LACP)
Ethernet Operation, Administration, and Maintenance 802.3ah (EOAM3ah)
Link Layer Discovery Protocol (LLDP)
Generic VLAN Registration Protocol (GVRP)
Generic VLAN Registration Protocol (GVRP)
HUAWEI Group Management Protocol (HGMP)
VLAN Trunking Protocol (VTP)
Unidirectional Link Detection (UDLD)
Port Aggregation Protocol (PAGP)
Cisco Discovery Protocol (CDP)
Per VLAN Spanning Tree Plus (PVST+)
Dynamic Trunking Protocol (DTP)
7
Destination address (0180-C200-0000)
Length
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Quidway S9300 Terabit Routing Switch
Figure 9-1, BPDUs use the encapsulation
15
Source address
BPDU data
Configuration Guide - Ethernet
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Issue 03 (2009-08-20)