Architectures (CRB and ERB) JN0-683 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A data center operator is designing a new EVPN-VXLAN fabric for a multi-tenant environment. The design team wants to minimize the number of devices that need to hold tenant-specific routing information and prefers to keep the underlay and overlay configuration as simple as possible. They also expect most traffic to be between servers in the same rack. Which architecture should they choose?

   • AEdge-Routed Bridging (ERB) with the gateway on the leaf
   • BA design with no gateway, using only Layer 2 switching
   • CCentrally-Routed Bridging (CRB) with the gateway on the spine
   • DA hybrid design with gateways on both leaf and spine
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A company is designing an EVPN-VXLAN fabric and expects a significant amount of north-south traffic (traffic to and from the internet) as well as east-west traffic. They want to ensure that the north-south traffic is handled efficiently. Which architecture should they choose?

   • AERB, because it provides a distributed gateway that can handle north-south traffic locally
   • BCRB, because it uses anycast gateways that distribute north-south traffic
   • CERB, because it centralizes north-south traffic on the spine
   • DCRB, because it provides a centralized point for north-south traffic
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which architecture generally requires more MAC address entries on the spine switches?

   • AERB
   • BCRB
   • CBoth are equal
   • DNeither requires MAC learning
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A network team is troubleshooting a performance issue in an EVPN-VXLAN fabric. They notice that all inter-subnet traffic between two servers on different leaves is taking a suboptimal path, going through the spine even though the leaves are directly connected. The team suspects the architecture is ERB. What is the most likely cause?

   • AThe spine is performing routing because the leaves are not configured with a gateway.
   • BThe VXLAN tunnels are not established between the leaves.
   • CThe underlay routing is misconfigured, causing the leaf to send traffic to the spine.
   • DThe anycast gateway is not configured correctly on the leaves.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A network engineer is designing an EVPN-VXLAN fabric and wants to ensure that traffic between two servers in the same subnet but on different leaves is forwarded efficiently. Which architecture should they choose?

   • ANeither, because the traffic must go to the spine for forwarding
   • BCRB, because it routes the traffic at the spine
   • CBoth, because the traffic is bridged at the leaf and forwarded via VXLAN
   • DERB, because it routes the traffic at the leaf
   Reveal Solution Discussion Select an answer first