NOTE
l For details on how to add an interface to VLANs in tagged mode, see the VLAN configuration in the
S7700 Configuration Guide- Ethernet.
l Before specifying a user-defined protocol in the l2protocol-tunnel vlan command, run the l2protocol-
tunnel user-defined-protocol command to define characteristic information about the Layer 2
protocol. STP packets have a default MAC address for replacing the original destination MAC address.
For packets of other Layer 2 protocols, you need to configure a global MAC address to replace the
destination MAC address. For details, see l2protocol-tunnel group-mac.
l The l2protocol-tunnel vlan and l2protocol-tunnel commands cannot specify the same protocol type
on the same interface; otherwise, the configurations conflict.
----End
11.4.5 Checking the Configuration
Context
Configurations of Layer 2 protocol transparent transmission are complete.
Procedure
l Run the display l2protocol-tunnel group-mac { all | protocol-type | user-defined-
protocol protocol-name } command to check information about transparent transmission
of specified or all Layer 2 protocol packets.
----End
11.5 Configuring QinQ-based Layer 2 Protocol Transparent
Transmission
When each interface of devices on the backbone network is connected to multiple user networks
and Layer 2 protocol packets sent from user network contain VLAN tags, you can configure
QinQ-based Layer 2 protocol transparent transmission so that Layer 2 protocol packets can be
transparently transmitted on the backbone network and that VLAN IDs of the carrier can be
saved.
11.5.1 Establishing the Configuration Task
Applicable Environment
When each interface of devices on the backbone network is connected to multiple user networks
and Layer 2 protocol packets sent from user networks contain VLAN tags, you can configure
QinQ-based Layer 2 protocol transparent transmission to save VLAN IDs of the carrier. In this
way, devices on the backbone network select tunnels for Layer 2 protocol packets according to
outer VLAN IDs of packets so that Layer 2 protocol packets of different VLANs are transmitted
across the backbone network through different tunnels.
Pre-configuration Tasks
Before configuring QinQ-based Layer 2 protocol transparent transmission, complete the
following task:
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 11 Layer 2 Protocol Transparent Transmission Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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