300-415 Question #84: Real Exam Question with Answer & Explanation

The correct answer is B: sdwan interface g0/0 tunnel-interface tloc-extension-gre-to 10.1.1.1. The correct IOS XE SD-WAN CLI syntax for TLOC extension over GRE uses the 'tunnel-interface' keyword with 'tloc-extension-gre-to' followed by the peer router's IP address.

WAN Edge Router Deployment

Question

A network administrator is configuring a tunnel interface on a branch Cisco IOS XE router to run TLOC extensions. Which configuration will extend a TLOC over a GRE tunnel to another router in the branch?

Options

Asdwan interface g0/0 gre-interface tloc-extension-gre-to 10.1.1.1
Bsdwan interface g0/0 tunnel-interface tloc-extension-gre-to 10.1.1.1
Csdwan interface g0/0 extended-interface tloc-extension-gre-from 10.1.1.1
Dsdwan interface g0/0 tloc-interface tloc-extension-gre-from 10.1.1.1

Explanation

The correct IOS XE SD-WAN CLI syntax for TLOC extension over GRE uses the 'tunnel-interface' keyword with 'tloc-extension-gre-to' followed by the peer router's IP address.

Common mistakes.

A. The keyword 'gre-interface' does not exist in the IOS XE SD-WAN CLI; the correct keyword for this context is 'tunnel-interface'.
C. The keyword 'extended-interface' is not valid in SD-WAN CLI, and 'tloc-extension-gre-from' is the syntax used on the TLOC-owning router, not on the router that is extending the TLOC.
D. The keyword 'tloc-interface' does not exist in the IOS XE SD-WAN CLI; only 'tunnel-interface' is the valid keyword for configuring TLOC extension.

Concept tested. IOS XE SD-WAN TLOC extension GRE tunnel CLI syntax

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/system-interface/ios-xe-17/systems-interfaces-book-xe/tloc-extension.html

Topics

#TLOC extensions#GRE tunnel#SD-WAN configuration#Cisco IOS XE

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