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D-SNC-DY-00 · Question #37

Refer to the exhibit. What can be determined from this show command?

The correct answer is D. Interface loopback 33 has been configured with 4.4.4.4 as an IP address. Option D is correct because the show command output (likely show nve interface or a similar VxLAN command) displays the source interface for the local VTEP as Loopback 33 and its associated IP address as 4.4.4.4. In VxLAN, the local VTEP always uses a loopback interface as its…

SONiC Management and Troubleshooting

Question

Refer to the exhibit. What can be determined from this show command?

Exhibits

D-SNC-DY-00 question #37 exhibit 1
D-SNC-DY-00 question #37 exhibit 2

Options

  • AVTEP1 only accepts traffic from a 4.4.4.4 source address.
  • BVxLAN QoS has been enabled on the remote VTEP.
  • CVPN has been enabled on the local device.
  • DInterface loopback 33 has been configured with 4.4.4.4 as an IP address.

How the community answered

(40 responses)
  • A
    8% (3)
  • B
    5% (2)
  • C
    3% (1)
  • D
    85% (34)

Explanation

Option D is correct because the show command output (likely show nve interface or a similar VxLAN command) displays the source interface for the local VTEP as Loopback 33 and its associated IP address as 4.4.4.4. In VxLAN, the local VTEP always uses a loopback interface as its tunnel source, so the IP shown belongs directly to that loopback.

Why the distractors are wrong:

  • A is wrong because 4.4.4.4 is the local source address of this device, not a traffic filter or ACL restricting inbound sources from remote VTEPs.
  • B is wrong because QoS settings appear in QoS-specific show commands, not in a VxLAN/NVE interface status output - and an IP address tells us nothing about QoS.
  • C is wrong because VxLAN is an overlay encapsulation technology, not a VPN service; VPN enablement would appear in a completely different show command context.

Memory tip: Think of the loopback as the VTEP's "home address" - whatever IP is assigned to that loopback is the VTEP IP. If a show command displays a source interface (e.g., Loopback 33) alongside an IP (e.g., 4.4.4.4), the IP lives on that interface - no filtering, no QoS, no VPN implied.

Topics

#VXLAN#VTEP#loopback interface#show command output

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