Manual
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Москва, Новозаводская ул., 18, стр. 1 
138 
Switch(config)#vlan 10 
Switch(Config-Vlan10)#switchport interface ethernet 1/10 
Switch B:  
Switch(config)#vlan 7;9;10 
Switch(config)#interface ethernet 1/7 
Switch(Config-If-Ethernet1/7)#switchport mode hybrid 
Switch(Config-If-Ethernet1/7)#switchport hybrid native vlan 7 
Switch(Config-If-Ethernet1/7)#switchport  hybrid  allowed  vlan  7;10 
untag 
Switch(Config-If-Ethernet1/7)#exit 
Switch(Config)#interface Ethernet 1/9 
Switch(Config-If-Ethernet1/9)#switchport mode hybrid 
Switch(Config-If-Ethernet1/9)#switchport hybrid native vlan 9 
Switch(Config-If-Ethernet1/9)#switchport  hybrid  allowed  vlan  9;10 
untag 
Switch(Config-If-Ethernet1/9)#exit 
Switch(Config)#interface Ethernet 1/10 
Switch(Config-If-Ethernet1/10)#switchport mode hybrid 
Switch(Config-If-Ethernet1/10)#switchport hybrid native vlan 10 
Switch(Config-If-Ethernet1/10)#switchport  hybrid  allowed  vlan  7;9;10 
untag 
Switch(Config-If-Ethernet1/10)#exit 
18.2 Dot1q-tunnel Configuration 
18.2.1 Introduction to Dot1q-tunnel 
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. 










