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

Questions 6–10

1. 6foundation · easy

   Which statement correctly contrasts the routing behavior of Asymmetric IRB and Symmetric IRB?

   • AIn Asymmetric IRB, routing is done at the egress VTEP; in Symmetric IRB, routing is done at the ingress VTEP.
   • BIn Asymmetric IRB, only the ingress VTEP routes; in Symmetric IRB, both the ingress and egress VTEPs route.
   • CIn Asymmetric IRB, both VTEPs route; in Symmetric IRB, only the ingress VTEP routes.
   • DIn Asymmetric IRB, routing is done by a centralized router; in Symmetric IRB, routing is done by the VTEPs.
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2. 7expert · hard

   In an Asymmetric IRB deployment, Host A (VLAN 10) sends traffic to Host B (VLAN 20). The ingress VTEP has the MAC address of Host B in its forwarding table, but the ARP cache for Host B's IP address has expired. What happens when the ingress VTEP receives the packet?

   • AThe ingress VTEP drops the packet because the ARP cache is expired and cannot be refreshed.
   • BThe ingress VTEP sends an ARP request for Host B's IP address and waits for a response before forwarding the packet.
   • CThe ingress VTEP uses the EVPN control plane to obtain the MAC address of Host B without sending an ARP request.
   • DThe ingress VTEP forwards the packet using the MAC address from its forwarding table, ignoring the ARP cache.
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4. 8application · medium

   A network engineer is configuring Asymmetric IRB on a VTEP. The VTEP has VLAN 10 mapped to VNI 10010 and VLAN 20 mapped to VNI 10020. Host A (VLAN 10) sends traffic to Host B (VLAN 20) on a remote VTEP. What VNI will the ingress VTEP use for the encapsulated packet?

   • AVNI 10010, because it is the source VLAN's VNI.
   • BA new VNI that is created for routed traffic.
   • CNo VNI is used because the traffic is routed.
   • DVNI 10020, because it is the destination VLAN's VNI.
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5. 9foundation · easy

   In Asymmetric IRB, what is the role of the egress VTEP for inter-subnet traffic?

   • AIt performs L2 forwarding only, delivering the frame to the destination host.
   • BIt performs both L2 bridging and L3 routing.
   • CIt performs L3 routing to the destination subnet.
   • DIt drops the packet if the destination is not in its local VLAN.
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6. 10foundation · easy

   What is the role of ARP in Asymmetric IRB for inter-subnet communication?

   • AThe ingress VTEP resolves the destination host's MAC address using ARP before routing the packet.
   • BThe source host sends an ARP request to the destination host directly.
   • CARP is not used in Asymmetric IRB because EVPN handles all address resolution.
   • DThe egress VTEP resolves the destination host's MAC address using ARP.
   Reveal Solution Discussion Select an answer first