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			ReStructuredText
		
	
	
	
	
	
| .. _interfaces-qinq:
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| 
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| QinQ
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| ----
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| 
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| QinQ (802.1ad_) — allows multiple VLAN tags to be inserted into a single frame.
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| 
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| QinQ can be used to tunnel vlans in a vlan.
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| 
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| **vif-s** and **vif-c** stand for the ethertype tags that get set:
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| 
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| The inner tag is the tag which is closest to the payload portion of the frame; it is officially called C-TAG (Customer tag, with ethertype 0x8100).
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| The outer tag is the one closer/closest to the Ethernet header; its name is S-TAG (Service tag, ethertype 0x88a8).
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| 
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| Configuration commands:
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| 
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| .. code-block:: sh
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| 
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|   interfaces
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|       ethernet <eth[0-999]>
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|           address <ipv4>
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|           address <ipv6>
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|           description <txt>
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|           disable
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|           ip
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|               <usual IP options>
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|           ipv6
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|               <usual IPv6 options>
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|           vif-s <[0-4096]>
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|               address <ipv4>
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|               address <ipv6>
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|               description <txt>
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|               disable
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|               ip
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|                   <usual IP options>
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|               ipv6
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|                   <usual IPv6 options>
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|               vif-c <[0-4096]>
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|                   address <ipv4>
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|                   address <ipv6>
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|                   description <txt>
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|                   disable
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|                   ip
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|                       <usual IP options>
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|                   ipv6
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|                       <usual IPv6 options>
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| 
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| 
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| Example:
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| 
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| .. code-block:: sh
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| 
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|   set interfaces ethernet eth0 vif-s 333
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|   set interfaces ethernet eth0 vif-s 333 address 192.0.2.10/32
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|   set interfaces ethernet eth0 vif-s 333 vif-c 777
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|   set interfaces ethernet eth0 vif-s 333 vif-c 777 address 10.10.10.10/24
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| 
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| .. _802.1ad: https://en.wikipedia.org/wiki/IEEE_802.1ad |