Dot1Q-Tunnel Configuration; Dot1Q-Tunnel Introduction - Digitalchina Networks DCS-3950 series Manual

DCS-3950 series Ethernet switch manual
The configuration steps are listed below:
Switch A:
Switch(Config)#vlan 2
Switch(Config-Vlan2)#switchport interface ethernet 0/0/2-8
Switch(Config-Vlan2)#exit
Switch(Config)#vlan 100
Switch(Config-Vlan100)#switchport interface ethernet 0/0/9-15
Switch(Config-Vlan100)#exit
Switch(Config)#vlan 200
Switch(Config-Vlan200)#switchport interface ethernet 0/0/16-22
Switch(Config-Vlan200)#exit
Switch(Config)#interface ethernet 0/0/23
Switch(Config-Ethernet0/0/23)#switchport mode trunk
Switch(Config-Ethernet0/0/23)#exit
Switch(Config)#
Switch B:
Switch(Config)#vlan 2
Switch(Config-Vlan2)#switchport interface ethernet 0/0/2-8
Switch(Config-Vlan2)#exit
Switch(Config)#vlan 100
Switch(Config-Vlan100)#switchport interface ethernet 0/0/9-15
Switch(Config-Vlan100)#exit
Switch(Config)#vlan 200
Switch(Config-Vlan200)#switchport interface ethernet 0/0/16-22
Switch(Config-Vlan200)#exit
Switch(Config)#interface ethernet 0/0/23
Switch(Config-Ethernet0/0/23)#switchport mode trunk
Switch(Config-Ethernet0/0/23)#exit

9.3 Dot1q-tunnel Configuration

9.3.1 Dot1q-tunnel Introduction

Dot1q-tunnel is also called QinQ (802.1Q-in-802.1Q), which is an expansion of
802.1Q. Its dominating idea is encapsulating the customer VLAN tag (CVLAN tag) to the
service provider VLAN tag (SPVLAN tag). Carrying the two VLAN tags the packet is
transmitted through the backbone network of the ISP internet, so to provide a simple
layer-2 tunnel for the users. It is simple and easy to manage, applicable only by static
configuration, and especially adaptive to small office network or small scale metropolitan
area network using layer-3 switch as backbone equipment.
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