“802.1Q隧道客户VLAN映射”和“802.1Q隧道提供商VLAN映射”的含义是什么？

Question

802.1Q tunnel customer VLAN mapping和802.1Q tunnel provider VLAN mapping的含义是什么？

Shows 802.1Q (QinQ) tunnel information.
802.1Q tunneling allows layer 2 VPN connectivity between sites by encapsulating 802.1Q trunk traffic inside another 802.1Q trunk.
Command Syntax
Command Modes Syntax Description
show dot1q-tunnel [interface {<interfaceName>| {port-channel <portChannel>}}]
show dot1q-tunnel {customer | provider} vlan mapping [interface {<interfaceName>| {port-channel <portChannel>}}]
show dot1q-tunnel encapsulation [interface {<interfaceName>| {port- channel <portChannel>}}]
Command Default Examples
#show dot1q-tunnel interface xe1
#show dot1q-tunnel interface port-channel 3800 #show dot1q-tunnel customer vlan mapping
118
Privileged Mode
interface
interfaceName
port-channel
portChannel
#
Show 802.1Q tunnel configuration on the specified interface.
Interface to show information for.
Show 802.1Q tunnel configuration on the specified port channel.
Port channel to show 802.1Q tunnel configuration information for.
encapsulation
vlan mapping
customer
provider
interfaceName
This command has no default settings.
ONP – Layer 2 Commands
Displays 802.1Q tunnel stacked VLAN configuration.
Displays 802.1Q tunnel VLAN mapping information.
Displays 802.1Q tunnel customer VLAN mapping information.
Displays 802.1Q tunnel provider VLAN mapping information.
Name of an interface port. For example, xe1.

我不明白这四句话：

Displays 802.1Q tunnel stacked VLAN configuration.
Displays 802.1Q tunnel VLAN mapping information.
Displays 802.1Q tunnel customer VLAN mapping information.
Displays 802.1Q tunnel provider VLAN mapping information.

Answer 1

使用QinQ (802.1ad)双标记，您可以使用内部(客户) VLAN和外部(提供者) VLAN。

关键是提供者可以向每个客户端提供完整的802.1Q标记服务，并且仍然使用外部标记作为自己的VLAN基础设施。

双标记可用于普通帧或(VPN)隧道内。