Describe the Operation of Symmetric IRB SONIC-DEPLOY Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A host in a symmetric IRB fabric sends a packet to a destination in a different subnet. The host's ARP cache contains the gateway MAC address. What is the source MAC address in the inner Ethernet header of the VXLAN packet sent by the ingress VTEP?

   • AThe MAC address of the ingress VTEP.
   • BThe MAC address of the host.
   • CThe anycast gateway MAC address.
   • DThe MAC address of the egress VTEP.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   In symmetric IRB, what is the significance of using the same MAC and IP address for the gateway on both VTEPs?

   • AIt allows the gateway to be moved to a central router
   • BIt ensures that hosts see a consistent gateway, avoiding asymmetric routing behavior
   • CIt prevents MAC learning on the VTEPs
   • DIt eliminates the need for VXLAN encapsulation
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   In a symmetric IRB VXLAN fabric, a host in VNI 100 sends an IPv6 Neighbor Solicitation (NS) for the gateway address. How does the VTEP handle this request?

   • AThe VTEP sends an NS to the remote VTEP to resolve the gateway MAC.
   • BThe VTEP drops the NS because IPv6 is not supported in VXLAN.
   • CThe VTEP responds with a Neighbor Advertisement (NA) containing the gateway MAC address.
   • DThe VTEP forwards the NS to all VTEPs in the fabric.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   In symmetric IRB, what is the role of the ingress VTEP when a host sends inter-subnet traffic?

   • AIt sends the packet to a central router for routing decisions
   • BIt bridges the frame to the destination host without any routing
   • CIt only decapsulates VXLAN and forwards the original frame
   • DIt performs a Layer 3 lookup and routes the packet to the destination subnet, then encapsulates it in VXLAN
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   In a symmetric IRB fabric, a host in VNI 100 sends an ARP request for the gateway IP. The VTEP responds with the gateway MAC. What is the impact on MAC learning in the fabric?

   • AThe VTEP does not learn the host's MAC because it is not a data packet.
   • BThe VTEP learns the host's MAC address and does not flood the ARP request.
   • CThe VTEP floods the ARP reply to all VTEPs, causing MAC learning on all VTEPs.
   • DThe VTEP sends the ARP request to the remote VTEP to learn the host's MAC.
   Reveal Solution Discussion Select an answer first