What Is a Key Element in vBond Orchestrator Redundancy?
Short answer
C A fully qualified domain name (FQDN) is the key element because vBond orchestrator redundancy requires DNS resolution to multiple vBond IPs.
Question
Key Takeaways
Tests the design element that enables vBond orchestrator redundancy; the trap is mistaking an optional load balancer or STUN server for the required FQDN that resolves to multiple vBonds.
Cisco SD-WAN vBond orchestrator redundancy relies on a fully qualified domain name (FQDN) so all devices can resolve multiple vBond IP addresses. This page establishes FQDN as the correct answer and explains why load balancers, DHCP, and STUN are not the key element.
Common mistake: Choosing a load balancer with health probes (A) because load balancers appear in some high-availability designs, but the key element that makes vBond redundancy work is the FQDN used for DNS resolution.
Expert Analysis
Why the Answer Is Correct
Cisco SD-WAN vBond orchestrator redundancy uses a fully qualified domain name (FQDN) as the key element because every vEdge router and controller is configured with that FQDN to reach the vBond. When multiple vBond orchestrators are deployed, DNS resolves the FQDN to multiple IP addresses, or a load balancer can present a single FQDN for the virtual IP. In either design, the FQDN is the stable name that devices use, making it the essential piece of the redundancy topology. The official Cisco high-availability documentation confirms that the vBond FQDN enables the resolution to redundant vBond instances. Thus C is correct.
Why the Other Options Are Wrong
Option A (load-balancer with health probes) is a possible implementation for vBond redundancy, but it is not the key element; it is an optional component that still relies on an FQDN. Option B (DHCP server) is unrelated, as DHCP assigns IP addresses and does not provide vBond redundancy. Option D (STUN server) is used for NAT traversal so vEdge devices can discover their public IP and port, not for redundancy. None of these are required for vBond orchestrator redundancy in the way the FQDN is.
Community Comment Notes
Stacey pointed to the Cisco high-availability and scaling guide, which supports FQDN as the redundancy mechanism. Stanleymahamadi commented "C correct answer after review", and Gycu simply wrote "C correct answer", reflecting the strong consensus for C. One later comment from Stanleymahamadi claimed "Correct answer A", but that likely confuses an optional load-balancer design with the fundamental FQDN requirement. The overwhelming vote count for C and the official reference align with the technical analysis.
Official Reference
This link opens the official vendor documentation in a new tab.
Exam Strategy
For 300-415 vBond redundancy questions, identify the element that is mandatory for all devices to reach any vBond instance; that is the FQDN. Load balancers and DNS are supporting mechanisms, not the key element itself.
Frequently Asked Questions
Why is a load balancer with health probes not the key element for vBond redundancy?
Does the vBond orchestrator use STUN for redundancy?
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 4 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 4
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Stacey 👍 1 Answered Chttps://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/optimization-ha/ios-xe-16/network-optimization-high-availability-book-xe/high-availability-and-scaling-xe-sdwan.html
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Stanleymahamadi 👍 2C correct answer after review
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Gycu 👍 1 Answered CC correct answer
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Stanleymahamadi 👍 1Correct answer A
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