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300-415 · Question #374

300-415 Question #374: Real Exam Question with Answer & Explanation

The correct answer is D: system system-ip 10.0.0.102 site-id 10 admin-tech-on-failure organization-name abc vbond 100.0.0.9 ! ip route 0.0.0.0 0.0.0.0 100.0.0.6 ! interface GigabitEthernet1 description MPLS Network *** no shutdown ip address 100.0.0.5 255.255.255.252 ! interface Tunnel1 no shutdown ip unnumbered GigabitEthernet1 tunnel source GigabitEthernet1 tunnel mode sdwan ! sdwan interface GigabitEthernet1 tunnel-interface encapsulation ipsec color mpls no allow-service all. SD-WAN underlay connectivity for a WAN Edge device requires basic system parameters, interface configuration, a default route, and specifically, the sdwan interface configuration with tunnel-interface and color to establish control and data plane tunnels.

WAN Edge Router Deployment

Question

Refer to the exhibit. An engineer must use the existing configurations of the Spoke1 site and build a new one for the Spoke2 site Which configuration establishes the SD-WAN underlay connectivity?

Options

  • Asystem system-ip 10.0.0.102 site-id 10 admin-tech-on-failure organization-name abc vbond 100.0.0.9 ! ip route 0.0.0.0 0.0.0.0 100.0.0.6 ! interface GigabitEthernet1 description MPLS Network *** no shutdown ip address 100.0.0.5 255.255.255.252
  • Bhostname cEdge2 ! interface GigabitEthernet1 description MPLS Network *** ip address 100.0.0.5 255.255.255.252 ! interface GigabitEthernet3 description Out Of Band Network *** ip address 100.0.0.3 255.255.255.0 ! ip route 0.0.0.0 0.0.0.0 100.0.0.6
  • Chostname cEdge2 ! interface GigabitEthernet1 description MPLS Network *** ip address 100.0.0.5 255.255.255.252 ! interface GigabitEthernet3 description Out Of Band Network *** ip address 100.0.0.3 255.255.255.0 ! ip route 0.0.0.0 0.0.0.0 100.0.0.6
  • Dsystem system-ip 10.0.0.102 site-id 10 admin-tech-on-failure organization-name abc vbond 100.0.0.9 ! ip route 0.0.0.0 0.0.0.0 100.0.0.6 ! interface GigabitEthernet1 description MPLS Network *** no shutdown ip address 100.0.0.5 255.255.255.252 ! interface Tunnel1 no shutdown ip unnumbered GigabitEthernet1 tunnel source GigabitEthernet1 tunnel mode sdwan ! sdwan interface GigabitEthernet1 tunnel-interface encapsulation ipsec color mpls no allow-service all

Explanation

SD-WAN underlay connectivity for a WAN Edge device requires basic system parameters, interface configuration, a default route, and specifically, the sdwan interface configuration with tunnel-interface and color to establish control and data plane tunnels.

Common mistakes.

  • A. This configuration is missing the sdwan specific interface configuration (tunnel-interface and color) and the tunnel mode sdwan which are essential for forming the SD-WAN overlay tunnels.
  • B. This configuration lacks the system block with SD-WAN specific parameters (system-ip, site-id, vbond) and the sdwan interface configuration, which are foundational for an SD-WAN device.
  • C. This configuration is missing the system block and the sdwan interface configuration necessary for an SD-WAN WAN Edge device, similar to option B.

Concept tested. SD-WAN WAN Edge underlay configuration

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/m-sdwan-basic-configuration.html

Topics

#WAN Edge Configuration#SD-WAN Underlay#Tunnel Interface#vBond Connectivity

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