An SD-WAN branch is deployed behind a NAT device.

The correct answer is A . Versa SD-WAN data-path troubleshooting documentation shows the VSM local-tunnel-site output and includes a legend in which BN means Behind NAT . In the WAN local link details, the output also displays a field named WAN lcl link behind NAT , with values such as 1 or 0, and link flags including [ BN CT PT SLA-P ] when the WAN link is behind NAT.

This information is important because NAT status affects how SD-WAN tunnel endpoints are discovered and how public and private transport addresses are represented. The same output includes both public and private WAN link addresses, making it useful for troubleshooting sites behind NAT, stale tunnel endpoints, or incorrect public-address learning.

WAN lcl vrf-id identifies the local transport routing instance ID, not NAT status. Tenant ID identifies the tenant context. Neighbour site type identifies whether the remote endpoint is a Controller, hub, or SD-WAN site. None of those fields specifically confirms whether the local WAN transport is behind NAT.