Describe the Operation of Symmetric IRB SONIC-DEPLOY Practice Questions (Page 5)

Questions 21–23

1. 21application · medium

   A network engineer is troubleshooting inter-subnet traffic in a VXLAN fabric using symmetric IRB. Host A (in VNI 100) sends a packet to Host B (in VNI 200). The ingress VTEP receives the packet, performs a routing lookup, and forwards the packet over the VXLAN tunnel. Which action does the egress VTEP perform when it receives the encapsulated packet?

   • AIt bridges the packet on VNI 200 to Host B based on the destination MAC address.
   • BIt performs a routing lookup and forwards the packet to Host B via the Layer 3 VNI.
   • CIt sends an ARP request to Host B to resolve the destination MAC before forwarding.
   • DIt decapsulates the packet and sends it directly to Host B without any Layer 2 lookup.
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   An organization is deploying symmetric IRB in a VXLAN fabric. The design requires that the anycast gateway MAC address be identical on all VTEPs. What is the primary benefit of this consistent MAC address?

   • AIt allows the ingress VTEP to skip the routing lookup.
   • BIt reduces the number of VNIs required in the fabric.
   • CIt enables hosts to use the same gateway IP and MAC regardless of which VTEP they are attached to.
   • DIt eliminates the need for a Layer 3 VNI.
   Reveal Solution Discussion Select an answer first
3. 23application · medium

   A network engineer is explaining symmetric IRB to a colleague. Which statement accurately describes the purpose of symmetric IRB in a VXLAN fabric?

   • AIt provides inter-subnet routing with consistent MAC/IP behavior on both ingress and egress VTEPs.
   • BIt uses a different gateway MAC on each VTEP to improve security.
   • CIt requires the egress VTEP to perform a routing lookup for every packet.
   • DIt eliminates the need for VXLAN tunneling by using native routing.
   Reveal Solution Discussion Select an answer first