Exam JN0-649 All QuestionsBrowse all questions from this exam
Question 19

Click the Exhibit button.

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.)

    Correct Answer: A, C

    In designing a network that uses a metro Ethernet service provider with Q-in-Q tagging, it is important to consider that VXLAN can be implemented on your network across this service provider network because VXLAN is a Layer 2 overlay scheme over a Layer 3 network. Also, L2PT (Layer 2 Protocol Tunneling) is required on the service provider network to support the spanning tree protocol because it can tunnel Layer 2 protocols between campuses, ensuring network stability and preventing loops.

Discussion
somanyquestionsOptions: AC

A. VXLAN could be implemented on your network across this service provider network. could be a valid option. B. Each campus switch shown must have a C-Tag 300 configured. no, since the provider is using S-Tag 300 and QinQ, you can use C-Tag 300 but also other, it's not a must. C. L2PT is required on the SP network to support the spanning tree protocol. yes, is needed! D. Each campus switch shown must have S-Tag 300 configured. no, the S-Tag is taken care of the providers QinQ

mohdemaOptions: CD

https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/ref/statement/layer2-protocol-tunneling-edit-vlans-l2pt-ex-series.html

hbstyleboy

What is this B.S ? The link doesn't even justify your answers at all. Don't troll plz. Administer should ban MF like u

sangkiOptions: BD

i think bc s-tag is handled by SP.

oz1iOptions: AC

AC is correct.

rfg8366Options: CD

Is fair to say, that considering that this is not an EVPN related question, CD do seem to be correct

YunasOptions: AB

A can be correct as we have layer 3 access to the all Camnpus's switche loopback ip address.

JoeSunOptions: BC

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.