IP Fabric Architectures (Spine/Leaf) JN0-281 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A network engineer is configuring a spine-leaf fabric with four spine switches. The goal is to ensure that traffic from a server connected to leaf-1 to a server connected to leaf-2 is distributed across all four spines. Which configuration is necessary to achieve this?

   • AConfigure a static route on leaf-1 pointing to leaf-2 with a next-hop of the spine with the lowest IP address.
   • BConfigure the leaf switches to use VXLAN with a single VTEP address for all spines.
   • CConfigure the underlay routing protocol so that leaf-1 has four equal-cost routes to leaf-2, one via each spine.
   • DEnable Spanning Tree Protocol on all spine and leaf switches to ensure only one path is active at a time.
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2. 22expert · hard

   A service provider is deploying a multi-tenant spine-leaf fabric. They need to support thousands of tenants, each with their own VLANs and IP subnets. The design uses VXLAN for overlay networking. The network team is concerned about the scalability of the underlay BGP sessions. Which approach is most effective to reduce the number of BGP sessions in the underlay?

   • AUse static routes on the leaf switches to reach all other leaves, avoiding the need for a dynamic routing protocol.
   • BConfigure all leaf switches to peer with each other in a full mesh, eliminating the need for spines in the underlay.
   • CUse OSPF instead of BGP for the underlay, as OSPF does not require any peering sessions.
   • DConfigure the spine switches as BGP route reflectors, and have all leaf switches peer with the spines.
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4. 23foundation · easy

   Which statement correctly describes the basic spine-leaf architecture?

   • AIt is a flat design where all switches are interconnected in a full mesh with each other.
   • BIt consists of a single layer of switches that all interconnect to provide redundancy.
   • CIt uses a hierarchical core, aggregation, and access layer where each layer provides a different function.
   • DIt is a two-tier design where every leaf switch connects to every spine switch, forming a full mesh between the layers.
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5. 24foundation · easy

   In a spine-leaf fabric, which devices are directly connected to leaf switches?

   • AOnly spine switches.
   • BOther leaves and the core switches.
   • CServers and spine switches.
   • DOnly other leaf switches.
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6. 25foundation · easy

   How does spine-leaf architecture provide high availability?

   • ABy providing multiple paths between any two leaves, so a failure of a spine or link does not isolate traffic.
   • BBy using a single spine switch that is highly reliable.
   • CBy using redundant power supplies in each switch.
   • DBy using a centralized controller that can reroute traffic.
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