Describe the Operation of Symmetric IRB SONIC-DEPLOY Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   How does symmetric IRB handle ARP requests for the gateway IP address?

   • AA central controller responds to the ARP request
   • BThe local VTEP responds with the anycast gateway MAC address
   • CThe ARP request is dropped because the gateway is not a real host
   • DThe ARP request is flooded to all VTEPs in the fabric
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the impact of symmetric IRB on MAC learning for routed traffic?

   • AMAC learning is performed by a central controller
   • BThe egress VTEP learns the source MAC of the host from the inner frame
   • COnly the ingress VTEP learns MAC addresses
   • DMAC learning is disabled for all traffic in symmetric IRB
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A packet arrives at the ingress VTEP in a symmetric IRB fabric. The destination host is in a different subnet and attached to a remote VTEP. What is the sequence of actions performed by the ingress VTEP?

   • AEncapsulate the packet with the destination VNI and forward it to the egress VTEP.
   • BRoute the packet, then encapsulate it with the Layer 3 VNI and forward to the egress VTEP.
   • CBridge the packet on the source VNI, then route and encapsulate with the Layer 3 VNI.
   • DSend the packet to the egress VTEP without any routing lookup.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A network engineer is comparing symmetric IRB and asymmetric IRB for a VXLAN fabric. The fabric has many subnets and VTEPs. Which advantage does symmetric IRB offer over asymmetric IRB?

   • AIt eliminates the need for a VRF on each VTEP.
   • BIt requires fewer VNIs because the Layer 3 VNI is shared across all tenants.
   • CIt allows the ingress VTEP to route and the egress VTEP to bridge, avoiding the need for every VTEP to have all Layer 2 VNIs.
   • DIt provides faster forwarding because the egress VTEP also performs a routing lookup.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A network team is implementing symmetric IRB in a VXLAN fabric. They want to ensure that traffic between two subnets is routed optimally and that the gateway MAC is consistent across all VTEPs. What is a key requirement for this design?

   • AThe gateway MAC must be different on the ingress and egress VTEPs.
   • BAll VTEPs must share the same anycast gateway MAC address.
   • CThe gateway MAC must be the same as the host MAC address.
   • DEach VTEP must have a unique anycast gateway MAC address.
   Reveal Solution Discussion Select an answer first