Describe the Operation of Symmetric IRB SONIC-DEPLOY Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A network engineer is troubleshooting inter-subnet traffic in a symmetric IRB fabric. The traffic between two subnets is failing. The engineer checks the VTEPs and finds that the Layer 3 VNI is not associated with the correct VRF on one VTEP. What is the likely impact?

   • AThe gateway MAC address will change.
   • BTraffic within the same subnet will fail.
   • CInter-subnet traffic will be dropped because the routing lookup fails.
   • DARP requests will not be answered.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   Which statement best describes the behavior of symmetric IRB in VXLAN?

   • AOnly the ingress VTEP performs routing, and the egress VTEP only bridges
   • BBoth ingress and egress VTEPs perform routing for inter-subnet traffic
   • CThe egress VTEP performs routing and the ingress VTEP performs bridging
   • DRouting is performed only by a central controller, not by VTEPs
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   How does symmetric IRB differ from asymmetric IRB in terms of gateway behavior?

   • ASymmetric IRB uses the same gateway MAC and IP on all VTEPs, while asymmetric IRB may use different gateway addresses per VTEP
   • BSymmetric IRB uses a centralized gateway, while asymmetric IRB uses distributed gateways
   • CSymmetric IRB uses a different gateway for each VNI, while asymmetric IRB uses one gateway for all VNIs
   • DSymmetric IRB does not require a gateway, while asymmetric IRB does
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A packet is sent from Host A (VNI 100) to Host B (VNI 200) in a symmetric IRB fabric. The ingress VTEP receives the packet and performs a routing lookup. What does the ingress VTEP do next?

   • AIt encapsulates the packet with the Layer 3 VNI and forwards it to the egress VTEP.
   • BIt sends the packet to the egress VTEP without any encapsulation.
   • CIt bridges the packet on VNI 100 and sends it to the egress VTEP.
   • DIt drops the packet because the destination is in a different subnet.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A network architect is designing a VXLAN fabric with symmetric IRB. The design uses a Layer 3 VNI associated with a VRF. What is the purpose of the Layer 3 VNI in this design?

   • AIt carries inter-subnet traffic between VTEPs after the ingress VTEP performs the routing decision.
   • BIt provides a separate Layer 2 broadcast domain for each tenant.
   • CIt is used only for traffic between hosts in the same subnet.
   • DIt carries VXLAN control-plane messages between VTEPs.
   Reveal Solution Discussion Select an answer first