300-415 Question #387: Real Exam Question with Answer & Explanation

Question

Options

• Aa control policy with the tloc-action backup command on the hub
• Ba control policy with the tloc-action backup command on the spokes
• Ctraffic engineering service on the spokes
• Dtraffic engineering service on the hub
• Ethe tloc-list command on the interface of the spokes

Explanation

To configure dynamic tunnels between two spoke sites connected to a single Cisco SD-WAN hub, a control policy with the 'tloc-action backup' command must be applied on the hub.

Common mistakes.

• B. Applying 'tloc-action backup' on spokes is not the correct mechanism for enabling dynamic spoke-to-spoke tunnels; this action is relevant to the hub's role in advertising TLOCs.
• C. Traffic engineering service on the spokes is not the primary feature for enabling dynamic spoke-to-spoke tunnels, although it can influence how traffic uses those tunnels once established.
• D. Traffic engineering service on the hub is not the primary feature for enabling dynamic spoke-to-spoke tunnels.
• E. The 'tloc-list' command is used to group TLOCs, often for policy application, but it is not the specific command that enables the dynamic spoke-to-spoke tunnel feature itself.

Concept tested. Cisco SD-WAN spoke-to-spoke direct tunnel enablement

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-20-4/sdwan-policies/m_control_policies.html#topic_e41_wsw_bkb

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