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JN0-649 · Question #149

You want to provide Layer 2 connectivity between campus sites using Ethernet switches through a metro Ethernet service provider who is using Q-in-Q tagging on their network. Referring to the…

The correct answer is B. Each campus switch shown must have a C-Tag 300 configured. C. L2PT is required on the SP network to support the spanning tree protocol. VXLAN , L2PT and S-Tag(service VLAN) are handled by ISP. C-Tag (customer VLAN) is handled by customer. In fact, in customer view, 2 campus switches are direct connected to each others so that they have to configure same vlan info whatever it is trunk or access port.

Ethernet Switching Features

Question

You want to provide Layer 2 connectivity between campus sites using Ethernet switches through a metro Ethernet service provider who is using Q-in-Q tagging on their network. Referring to the exhibit, what are two design considerations in this environment? (Choose two.)

Exhibit

JN0-649 question #149 exhibit

Options

  • AVXLAN could be implemented on your network across this service provider network.
  • BEach campus switch shown must have a C-Tag 300 configured.
  • CL2PT is required on the SP network to support the spanning tree protocol.
  • DEach campus switch shown must have S-Tag 300 configured.

How the community answered

(30 responses)
  • A
    10% (3)
  • B
    83% (25)
  • D
    7% (2)

Explanation

VXLAN , L2PT and S-Tag(service VLAN) are handled by ISP. C-Tag (customer VLAN) is handled by customer. In fact, in customer view, 2 campus switches are direct connected to each others so that they have to configure same vlan info whatever it is trunk or access port.

Topics

#Q-in-Q tagging#L2PT#C-Tag#metro Ethernet

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