Layer 2 Protocol Transparent Transmission Features Supported By The S7700 - Huawei Quidway S7700 Configuration Manual - Ethernet

Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet
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A Layer 2 protocol packet is transparently transmitted as follows:
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11.2 Layer 2 Protocol Transparent Transmission Features
Supported by the S7700
This section describes the Layer 2 protocol transparent transmission features supported by the
S7700.
Based on application scenarios, the S7700 supports the following Layer 2 protocol transparent
transmission features:
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Currently, the S7700 can transparently transmit packets of the following Layer 2 protocols:
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Issue 01 (2011-07-15)
Each site on a user network can receive Layer 2 protocol packets from other sites.
Layer 2 protocol packets sent from a user network are not processed by CPUs of devices
on the backbone network.
Layer 2 protocol packets of different user networks are separated from each other.
A user-side device on the backbone network replaces the multicast destination MAC
address of Layer 2 protocol packets with a specified multicast MAC address.
Devices on the backbone network determine whether to add an outer VLAN tag to the
packet according to the transparent transmission mode.
The egress device on the backbone network restores the original multicast destination MAC
address of the packet according to the mappings between multicast destination MAC
addresses and Layer 2 protocols. The egress device also determines whether to remove the
outer VLAN tag, and then forwards the packet to the user network.
Interface-based Layer 2 protocol transparent transmission
VLAN-based Layer 2 protocol transparent transmission
QinQ-based Layer 2 protocol transparent transmission
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 Multicast Registration Protocol (GMRP)
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)
User-defined protocols
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11 Layer 2 Protocol Transparent Transmission Configuration
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