300-415 Question #436: Real Exam Question with Answer & Explanation

The correct answer is A: omp no address-family ipv4. Removing the IPv4 address family from OMP stops the device from advertising and receiving IPv4 prefixes via OMP, effectively preventing data traffic forwarding for end users through CSR101.

WAN Edge Router Deployment

Question

Refer to the exhibit. Which command is needed to prevent end users from sending data traffic through CSR101?

Options

Aomp no address-family ipv4
Bomp no overlay-as
Comp no graceful-restart
Domp shutdown

Explanation

Removing the IPv4 address family from OMP stops the device from advertising and receiving IPv4 prefixes via OMP, effectively preventing data traffic forwarding for end users through CSR101.

Common mistakes.

B. 'omp no overlay-as' removes the overlay autonomous system number, which disrupts OMP session establishment entirely rather than selectively blocking data-plane route advertisements.
C. 'omp no graceful-restart' only disables the graceful restart capability during OMP session failures and has no effect on normal data traffic forwarding.
D. 'omp shutdown' tears down all OMP sessions completely, affecting both control and data plane operations rather than selectively preventing user traffic forwarding.

Concept tested. OMP address-family control for data traffic prevention

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/ios-xe-17/routing-book-xe/m-omp.html

Topics

#OMP Configuration#Route Advertisement#Data Plane Control#SD-WAN Edge Router

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