Exam 300-420 topic 1 question 179 discussion

I am not entirely sure even after this quotes from Cisco docs. But look on the question itself its not about resiliency (recovering quickly and adapting to changes) but about redundancy (mostly backup in place). So if we are not looking for improving resiliency but to achieve redundancy we need another vManager instance in cluster.

If you look it up. It's OMP. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/ha-scaling/ios-xe-17/high-availability-book-xe/m-high-availability-and-scaling.html

I think is B

OMP is Overlay Management Protocol... I think D is not answer

D would be correct if the statement was "Overlay", instead of "Underlay".

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/optimization-ha/vedge/network-optimization-high-availability-book/high-availability.html#concept_fpj_v53_x3b

SD-WAN control plane redundancy can be achieved by using multiple instances of the vManage management system in clusters. Clustering vManage instances provides high availability and redundancy for the control plane, ensuring that if one vManage instance fails, another can take over without service interruption.

Guys the answer is CLEARLY NOT D, you OMP Routes are used in Overlay network not the underlay network, this is basically trying to trick you. The answer is C.

I voting D as I am guessing it seems maybe the writers of this question meant to put "overlay" instead of "underlay" because frankly none of the answers are correct.

...To provide a resilient control plane, the Cisco SD-WAN *Overlay* Management Protocol (OMP) regularly monitors,,, not underlay as stated in this option D. Managing the underlay network with OMP... I'm tilting to A

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/ha-scaling/ios-xe-17/high-availability-book-xe/m-high-availability-and-scaling.html Software mechanisms ensure rapid recovery from a failure. To provide a resilient control plane, the Cisco SD-WAN Overlay Management Protocol (OMP) regularly monitors the status of all Cisco IOS XE SD-WAN devices in the network and automatically adjusts to changes in the topology as devices join and leave the network. For data plane resiliency, the Cisco SD-WAN software implements standard protocol mechanisms, specifically Bidirectional Forwarding Detection (BFD), which runs on the secure IPsec tunnels between routers. - A. BFD used for data plane resilience - D. OMP also monitors devices and adjust the network topology (network devcies are belong to underlay)

Answer:D Software Support of High Availability The Cisco SD-WAN software support for high availability and resiliency in the face of failure is provided both in the control plane, using the standard DTLS protocol and the proprietary Cisco SD-WAN Overlay Management Protocol (OMP), and in the data plane, using the industry-standard protocols BFD, BGP, OSPF, and VRRP.

Also going for "D" based on the link provided by Hope66. "To provide a resilient control plane, the Cisco SD-WAN Overlay Management Protocol (OMP) regularly monitors..." --> Control plane "For data plane resiliency, the Cisco SD-WAN software implements standard protocol mechanisms, specifically Bidirectional Forwarding Detection (BFD)..." --> Data plane

I think D : https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/optimization-ha/vedge/network-optimization-high-availability-book/high-availability.html