interface GigabitEthernet1/0/0
port link-type trunk
port trunk allow-pass vlan 10
#
return
5.12.10 Example for Connecting a Sub-interface Enabled with
VLAN Stacking to a VLL Network
Networking Requirements
As shown in Figure 5-10, CE1 and CE2 are connected to PE1 and PE2 respectively through
VLANs.
A Martini VLL is set up between CE1 and CE2.
Switch1 is connected to CE1 and PE1.
Switch2 is connected to CE2 and PE2.
Switch1 forwards the packets sent from CE1 without changing the VLAN tags of the packets.
Selective QinQ is configured on the interface connected to CE2 so that Switch2 adds the VLAN
tag specified by the carrier to the packets sent from CE2.
The packets sent by Switch1 to PE1 contain only one VLAN tag, and the packets sent by
Switch2 to PE2 contain two VLAN tags. Therefore, you need to configure VLAN stacking on
the sub-interface of PE1 connected to Switch1 and connect the sub-interface to the VLL. Then
CE1 and CE2 can communicate with each other.
When a switch is connected to multiple CEs, the switch can add different VLAN tags to the
packets from different CEs, that is, packets with different VLAN tags. This saves VLAN IDs
on the public network.
Figure 5-10 Networking diagram for configuring a Martini VLL
GE1/0/0
GE1/0/0
CE1
CE2
PE1
PE2
P
Loopback1
1.1.1.9/32
Loopback1
2.2.2.9/32
Loopback1
3.3.3.9/32
GE2/0/0
GE1/0/0
GE2/0/0
GE1/0/0
GE2/0/0
GE1/0/0
GE2/0/0
GE1/0/0
GE2/0/0
GE1/0/0
Switch2
Switch1
Switch
Interface VLANIF interface IP address
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 5 QinQ Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
259
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