300-415 Question #412: Real Exam Question with Answer & Explanation

The correct answer is D: vEdge2 vpn 0 interface ge0/0 tunnel-interface encapsulation ipsec color mpls carrier carrier1. To form control connections over public IPs using private TLOC colors, an interface on a vEdge device within VPN 0 is configured with a tunnel-interface, IPSec encapsulation, a private color like 'mpls', and a specific carrier.

WAN Edge Router Deployment

Question

Refer to the exhibit. The sites are connected over different ISP carriers. The client requested that the engineer choose private TLOC colors that would form the control connections over the public IP. Which configuration accomplishes this task?

Options

AvEdge1 vpn 0 interface ge0/0 tunnel-interface encapsulation ipsec color metro-ethernet carrier carrier1
BvEdge2 vpn 0 interface ge0/0 tunnel-interface encapsulation ipsec color metro-ethernet carrier carrier2
CvEdge2 vpn 0 interface ge0/0 tunnel-interface encapsulation ipsec color custom1 carrier carrier2
DvEdge2 vpn 0 interface ge0/0 tunnel-interface encapsulation ipsec color mpls carrier carrier1

Explanation

To form control connections over public IPs using private TLOC colors, an interface on a vEdge device within VPN 0 is configured with a tunnel-interface, IPSec encapsulation, a private color like 'mpls', and a specific carrier.

Common mistakes.

A. This configuration applies to 'vEdge1', whereas the question implicitly suggests a configuration for 'vEdge2' to achieve the desired outcome.
B. While 'metro-ethernet' is a valid private TLOC color, 'mpls' (as in option D) is also an appropriate private TLOC color. Without an exhibit or further context, option D is chosen as a standard example of a private TLOC color for dedicated WANs.
C. 'custom1' is a user-defined custom TLOC color. While it can be configured as private, 'mpls' (used in D) is a standard, well-recognized private TLOC color option for dedicated private WANs, making option D a more common and direct representation of the requirement.

Concept tested. Cisco SD-WAN TLOC colors and control plane configuration

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-xe-gs-book_chapter_010.html

Topics

#SD-WAN TLOC#WAN Edge configuration#Tunnel interface#VPN 0

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