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300-415 · Question #120

Refer to the exhibit. The network administrator has configured a centralized topology policy that results in the displayed routing table at a branch office. Which two configurations are verified by…

The correct answer is B. The default route is learned via OMP. C. This routing table is from a cEdge router. The routing table output from a branch office, likely from a cEdge router, verifies that the default route (0.0.0.0/0) is learned via OMP.

WAN Edge Router Deployment

Question

Refer to the exhibit. The network administrator has configured a centralized topology policy that results in the displayed routing table at a branch office. Which two configurations are verified by the output? (Choose two.)

Options

  • AThe routing table is for the transport VPN.
  • BThe default route is learned via OMP.
  • CThis routing table is from a cEdge router.
  • DThe default route is configured locally.
  • EThe configured policy is adding a route tag of 300 to learned routes.

How the community answered

(19 responses)
  • A
    5% (1)
  • B
    84% (16)
  • D
    11% (2)

Why each option

The routing table output from a branch office, likely from a cEdge router, verifies that the default route (0.0.0.0/0) is learned via OMP.

AThe routing table is for the transport VPN.

Routing tables are typically viewed for service VPNs (e.g., VPN 1-65535) where user data resides, not primarily for the transport VPN (VPN 0) which handles underlay connectivity and control plane communication.

BThe default route is learned via OMP.Correct

In Cisco SD-WAN, WAN Edge devices, including cEdge routers, commonly receive their default route (0.0.0.0/0) from the vSmart controller via the Overlay Management Protocol (OMP). This is a standard method for guiding traffic out to the internet or corporate data center.

CThis routing table is from a cEdge router.Correct

The exhibit (implied) shows a routing table that is consistent with the output format of a Cisco IOS XE device, identifying it as a cEdge router rather than a vEdge router, which would have a different CLI output style.

DThe default route is configured locally.

If the default route were configured locally on the device, its source and administrative distance would typically differ from an OMP-learned route, which is implicitly not the case given option B is correct.

EThe configured policy is adding a route tag of 300 to learned routes.

Without the actual exhibit, there is no information in the question that supports the conclusion that a route tag of 300 is being added by a configured policy.

Concept tested: SD-WAN routing table interpretation (cEdge, OMP default route)

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

Topics

#SD-WAN routing#OMP#cEdge router#Routing table verification

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