300-415 · Question #304
What are the two impacts of losing vManage connectivity to fabric in the Cisco SD-WAN network? (Choose two.)
The correct answer is A. Policy ceases propagation stops. D. Statistics collection stops. Losing vManage connectivity to the SD-WAN fabric impacts the ability to push new policy configurations and halts the collection of network performance statistics.
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Options
- APolicy ceases propagation stops.
- BCreation of templates is impossible.
- CBFD peering between WAN Edge devices are established.
- DStatistics collection stops.
- EIPsec tunnels tear down for WAN Edge devices.
How the community answered
(23 responses)- A96% (22)
- E4% (1)
Why each option
Losing vManage connectivity to the SD-WAN fabric impacts the ability to push new policy configurations and halts the collection of network performance statistics.
vManage is the central point for creating and deploying all policies to the vSmart controllers. If vManage loses connectivity to the fabric, it cannot push any new or updated policy configurations, thereby stopping policy propagation.
Template creation is a function of the vManage user interface itself; an administrator can still create templates even if vManage loses connectivity to the fabric, although deployment would be impossible.
BFD peering and IPsec tunnel establishment are handled by the vSmart controller (control plane) and WAN Edge devices (data plane); once established, they typically continue to function independently of vManage's connectivity to the fabric.
The vManage controller is responsible for collecting, storing, and presenting all real-time and historical network statistics, events, and alarms from WAN Edge devices and other controllers. Loss of connectivity prevents vManage from receiving this telemetry data, causing statistics collection to cease.
IPsec tunnels are managed by vSmart and WAN Edge devices, and they typically remain operational as long as the vSmart controller is reachable and functioning, even if vManage loses connectivity to the fabric.
Concept tested: Impact of vManage connectivity loss in SD-WAN
Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-deploy-overview.html
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