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154 lines
3.8 KiB
Plaintext
154 lines
3.8 KiB
Plaintext
.. include:: /_include/need_improvement.txt
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IEEE 802.1ad_ was an Ethernet networking standard informally known as QinQ as
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an amendment to IEEE standard 802.1q VLAN interfaces as described above.
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802.1ad was incorporated into the base 802.1q_ standard in 2011. The technique
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is also known as provider bridging, Stacked VLANs, or simply QinQ or Q-in-Q.
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"Q-in-Q" can for supported devices apply to C-tag stacking on C-tag (Ethernet
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Type = 0x8100).
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The original 802.1q_ specification allows a single Virtual Local Area Network
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(VLAN) header to be inserted into an Ethernet frame. QinQ allows multiple
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VLAN tags to be inserted into a single frame, an essential capability for
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implementing Metro Ethernet network topologies. Just as QinQ extends 802.1Q,
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QinQ itself is extended by other Metro Ethernet protocols.
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In a multiple VLAN header context, out of convenience the term "VLAN tag" or
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just "tag" for short is often used in place of "802.1q_ VLAN header". QinQ
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allows multiple VLAN tags in an Ethernet frame; together these tags constitute
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a tag stack. When used in the context of an Ethernet frame, a QinQ frame is a
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frame that has 2 VLAN 802.1q_ headers (double-tagged).
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In VyOS the terms ``vif-s`` and ``vif-c`` stand for the ethertype tags that
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are used.
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The inner tag is the tag which is closest to the payload portion of the frame.
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It is officially called C-TAG (customer tag, with ethertype 0x8100). The outer
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tag is the one closer/closest to the Ethernet header, its name is S-TAG
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(service tag with Ethernet Type = 0x88a8).
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.. cmdinclude:: /_include/interface-address-with-dhcp.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-description.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-disable.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-disable-link-detect.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-mac.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-mtu.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-ip.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-ipv6.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-vrf.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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**DHCP(v6)**
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.. cmdinclude:: /_include/interface-dhcp-options.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-dhcpv6-options.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. cmdinclude:: /_include/interface-dhcpv6-prefix-delegation.txt
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:var0: {{ var0 }}
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:var1: {{ var1 }}
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:var2: vif-s
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:var3: <vlan-id>
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:var4: 1000
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:var5: vif-c
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:var6: <vlan-id>
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:var7: 20
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.. include:: /_include/common-references.txt
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