Symmetric Routing JN0-683 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A network administrator is troubleshooting asymmetric traffic flows in an EVPN-VXLAN fabric. The administrator notices that traffic from Host A to Host B takes a different path than traffic from Host B to Host A. The fabric uses symmetric routing. What is the most likely cause of this behavior?

   • AThe MAC address of the destination host is not advertised via the Layer 3 VNI.
   • BThe VTEPs are using asymmetric routing due to a misconfiguration.
   • CThe IRB interfaces for the source and destination subnets are not configured on all VTEPs.
   • DThe Layer 3 VNI is not configured on both VTEPs.
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2. 2application · medium

   A network engineer is configuring a new tenant in an EVPN-VXLAN fabric with symmetric routing. The tenant has two subnets, and the engineer has created a VRF and assigned a Layer 3 VNI. The engineer also needs to configure IRB interfaces. Where should the IRB interfaces be configured?

   • AOn every VTEP in the fabric, regardless of whether they have hosts in the subnets.
   • BOnly on the VTEP that is the designated gateway for the tenant.
   • COnly on VTEPs that have hosts in the respective subnets.
   • DOn the VTEPs that are connected to the core network.
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4. 3foundation · easy

   Why does symmetric routing scale better than asymmetric routing in a large EVPN-VXLAN fabric?

   • AIt eliminates the need for BGP EVPN signaling.
   • BIt uses fewer VNIs because it reuses the Layer 2 VNI for routing.
   • CIt reduces the number of VTEPs required in the fabric.
   • DIt avoids the need for a centralized gateway, distributing routing across all VTEPs.
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5. 4foundation · easy

   What is the role of an Integrated Routing and Bridging (IRB) interface in symmetric routing?

   • AIt encapsulates traffic with the Layer 3 VNI.
   • BIt provides a Layer 3 gateway for a VLAN, enabling routing between subnets.
   • CIt provides a loopback interface for BGP peering.
   • DIt connects the VXLAN tunnel to the physical network.
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6. 5foundation · easy

   In an EVPN-VXLAN fabric, what is the defining characteristic of symmetric routing?

   • ARouting occurs only at the centralized gateway, and VTEPs act as pure Layer 2 switches.
   • BBoth the ingress and egress VTEPs perform Layer 3 routing using the same Layer 3 VNI.
   • COnly the ingress VTEP performs Layer 3 routing, and the egress VTEP forwards the packet as a Layer 2 frame.
   • DThe egress VTEP performs all routing decisions, and the ingress VTEP only encapsulates traffic.
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