IP Fabric Architecture JN0-683 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A network architect is designing an IP fabric and must ensure that the fabric can be expanded from 16 leaf switches to 64 leaf switches without changing the core design. The underlay will use eBGP. What is the primary design consideration to support this growth?

   • AUse a single ASN for all switches to simplify BGP configuration.
   • BConfigure all leaves in a single OSPF area to reduce BGP overhead.
   • CEnsure each leaf has a unique ASN and each spine has a unique ASN.
   • DUse a route reflector on each spine to handle iBGP sessions.
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A network architect is designing an IP fabric with 32 leaf switches and 8 spine switches. They want to ensure that the fabric can handle a spine switch failure without causing any traffic loss. The underlay uses eBGP. What is the most important design consideration to ensure fast convergence during a spine failure?

   • AEnsure that each leaf has BGP sessions to all spines and that BGP timers are tuned for fast failure detection.
   • BUse a single BGP session between each leaf and a route reflector to reduce the number of sessions.
   • CUse OSPF instead of eBGP to simplify the configuration and speed up convergence.
   • DConfigure static routes on the leaves pointing to the spine IP addresses.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A data center operator is implementing EVPN-VXLAN to provide Layer 2 and Layer 3 services across an IP fabric. The design must support inter-subnet routing (e.g., VLAN 10 to VLAN 20) without requiring the traffic to hairpin through an external router. Where should the routing be performed to meet this requirement?

   • AOn the leaf switches using distributed anycast gateway.
   • BOn the spine switches using centralized routing.
   • COn the servers themselves using policy-based routing.
   • DOn a dedicated firewall appliance connected to the fabric.
   Reveal Solution Discussion Select an answer first
5. 4foundation · medium

   What is a primary reason the spine-and-leaf topology provides predictable latency in an IP fabric?

   • AThe topology uses a single spine switch to centralize all forwarding decisions.
   • BSpine switches use cut-through switching to eliminate all queuing delay.
   • CLeaf switches are directly connected to each other to reduce hop count.
   • DAll traffic between any two leaf switches traverses the same number of hops.
   Reveal Solution Discussion Select an answer first
6. 5foundation · medium

   What is a common configuration consideration when using BGP in an IP fabric?

   • AUsing a full mesh of BGP sessions between all switches.
   • BDisabling ECMP to ensure BGP convergence.
   • CUsing the same autonomous system number (ASN) for all switches in the fabric.
   • DConfiguring BGP to carry tenant MAC addresses.
   Reveal Solution Discussion Select an answer first