QuestionQ26

SD-WAN setup

Refer to the exhibits.

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The SD-WAN zone and member configurations for two branch devices are displayed. The two branch devices belong to the same hub-and-spoke topology and connect to the same hub. They are configured to permit Auto Discovery VPN (ADVPN), and the hub configuration permits the initial communication between the two spokes.

When traffic flow requires it, between which interfaces can the devices establish shortcuts?

  • A Any interface in the overlay zones
  • B Interface connected to HUB only.
  • C Between T2 on Branch-A and TA on Branch-B
  • D Between T3 on Branch-A and TC on Branch-B
Explanation

ADVPN 2.0 uses each SD-WAN member’s transport-group value to distinguish transport types and does not attempt a shortcut between members in different transport groups. T2 and TA both use transport group 1, so they can form an ADVPN shortcut. T3 and TC use transport groups 2 and 3 respectively, so they cannot form a shortcut with one another.

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