IP Fabric Architecture JN0-683 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A network engineer is troubleshooting an EVPN-VXLAN fabric where tenants on different leaves cannot communicate. The underlay is up and all VTEPs can ping each other's loopback addresses. However, MAC addresses are not being learned across the fabric. What is the most likely cause?

   • AThe spine switches are not configured with VXLAN encapsulation.
   • BThe EVPN address family is not configured or not activated on the BGP sessions between the VTEPs.
   • CThe tenant VLANs are not configured on the spine switches.
   • DThe VXLAN VNI is not mapped to the correct VLAN on the leaf switches.
   Reveal Solution Discussion Select an answer first
2. 17foundation · medium

   How does an overlay network interact with the underlay in an IP fabric?

   • AThe overlay replaces the underlay routing protocol with its own.
   • BThe overlay encapsulates tenant traffic and sends it across the underlay between leaf switches.
   • CThe overlay requires the underlay to be a Layer 2 network.
   • DThe overlay and underlay use the same routing table on each switch.
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A company is designing a new data center fabric to support a mix of east-west traffic between application tiers and north-south traffic from clients. The network team wants to ensure that the latency between any two servers remains consistent regardless of which leaf switches they connect to. Which topology characteristic is essential to meet this requirement?

   • AEvery spine switch connects to every other spine switch in a full mesh.
   • BEvery leaf switch connects to every spine switch, and servers connect only to leaf switches.
   • CLeaf switches are interconnected in a ring topology to provide redundant paths.
   • DSpine switches are placed in a hub-and-spoke design with leaves as spokes.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A network engineer is configuring an IP fabric with OSPF as the underlay. The fabric has 10 leaf switches and 4 spine switches. The engineer wants to ensure that the OSPF design is optimal for the fabric and does not require complex area planning. What is the recommended OSPF configuration for this underlay?

   • AConfigure all switches in a single OSPF area (area 0).
   • BConfigure OSPF only on the spines and use static routes on the leaves.
   • CConfigure each leaf in a separate OSPF area and the spines in area 0.
   • DConfigure OSPF with a different area per spine to isolate failures.
   Reveal Solution Discussion Select an answer first
6. 20foundation · medium

   What is the primary function of the underlay network in an IP fabric?

   • AIt isolates tenant traffic using VLANs and VRFs.
   • BIt provides a separate routing table for each tenant.
   • CIt provides the physical and logical IP connectivity between switches, forming the fabric's transport.
   • DIt provides Layer 2 connectivity between virtual machines across the data center.
   Reveal Solution Discussion Select an answer first