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Nokia 4A0-D03 Exam - Topic 5 Question 6 Discussion

Posted by Gladys on Jul 21, 2026 at 01:24 PM

Consider the exhibit.

dcgw10 is a Nokia 7750SR and is used as the integrated gateway.

Which of the following is NOT configured in VPLS 100 on dcgw10?

Suggested Answer: B

Comprehensive and Detailed 150 to 250 words of Explanation From [SR Linux EVPN and Data Center Interconnect/Course Guide/topics]:

For Layer 2 data center interconnect using an integrated gateway, VPLS 100 on the Nokia 7750 SR represents the WAN-side Layer 2 VPN service. The VPLS requires an EVI because EVPN uses the EVI to identify the L2 service instance in the control plane. It also requires BGP EVPN signaling with the appropriate route targets so the local and remote service instances can import the correct EVPN routes. Because the service is transported across the WAN, the BGP/EVPN instance must be associated with the MPLS transport tunnels toward the remote gateway, dcgw20. A VXLAN instance with a VNI is not configured in the 7750 SR VPLS 100 for this integrated WAN gateway service. The VXLAN/VNI mapping is used inside the SR Linux data center fabric where MAC-VRF services are transported over VXLAN. On the WAN side, the VPLS service is carried using MPLS/EVPN mechanisms, not a VXLAN VNI configured directly under the VPLS. Reference: integrated gateway DCI, L2 EVPN/VPLS interworking, EVI and route-target operation.


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15 comments · newest first
VA
Val 26 days ago
Exactly! It could be a common setup.
DO
Dorthy 1 month ago
True, but maybe it’s not unique in this case.
ZO
Zona 1 month ago
Good point! But isn't the BGP instance usually required?
VA
Val 1 month ago
I disagree, I think C is NOT configured. BGP instances can vary.
DO
Dorthy 2 months ago
I feel like A is the answer. The EVI is essential, right?
ZO
Zona 2 months ago
This question is tricky! I think it's about understanding VPLS configurations.
ZA
Zachary 2 months ago
Agreed, BGP instances are crucial for VPLS setups!
RE
Renay 2 months ago
I think A is the right answer here.
DO
Dorothy 2 months ago
Wait, are we sure about D? Seems odd to bind BGP like that.
EL
Elenora 2 months ago
Definitely not C, that’s a key part of VPLS!
XO
Xochitl 3 months ago
VPLS 100 is all about the EVI and VXLAN.
CA
Carin 3 months ago
I definitely remember that the EVI is essential for VPLS, but I'm a bit confused about the VXLAN instance requirement.
CE
Ceola 3 months ago
I feel like option C might be the answer since not every VPLS setup needs two unique route targets, but I could be wrong.
CO
Corazon 3 months ago
I think the question is similar to one we practiced about VXLANs and VPLS, but I can't recall if the BGP instance is mandatory.
RE
Reena 3 months ago
I remember studying VPLS configurations, but I'm not sure if BGP instances are always required.
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