ANS-C01 · Question #34
A company has deployed a software-defined WAN (SD-WAN) solution to interconnect all of its offices. The company is migrating workloads to AWS and needs to extend its SD-WAN solution to support…
The correct answer is C. Configure the AS_PATH prepend attribute on the secondary SD-WAN virtual appliance for BGP. AS_PATH prepending is a standard BGP way of influencing return traffic for advertised prefixes and SDWAN supports this.
Question
A company has deployed a software-defined WAN (SD-WAN) solution to interconnect all of its offices. The company is migrating workloads to AWS and needs to extend its SD-WAN solution to support connectivity to these workloads. A network engineer plans to deploy AWS Transit Gateway Connect and two SD-WAN virtual appliances to provide this connectivity. According to company policies, only a single SD-WAN virtual appliance can handle traffic from AWS workloads at a given time. How should the network engineer configure routing to meet these requirements?
Options
- AAdd a static default route in the transit gateway route table to point to the secondary SD-WAN
- BConfigure the BGP community tag 7224:7300 on the primary SD-WAN virtual appliance for BGP
- CConfigure the AS_PATH prepend attribute on the secondary SD-WAN virtual appliance for BGP
- DDisable equal-cost multi-path (ECMP) routing on the transit gateway for Transit Gateway
How the community answered
(68 responses)- A7% (5)
- B12% (8)
- C57% (39)
- D24% (16)
Explanation
AS_PATH prepending is a standard BGP way of influencing return traffic for advertised prefixes and SDWAN supports this.
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