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

Questions 1–5

1. 1application · medium

   A network engineer is explaining Asymmetric IRB to a colleague. Which statement accurately describes the role of Asymmetric IRB in a VXLAN EVPN deployment?

   • AIt uses a dedicated L3 VNI for all routed traffic, simplifying the configuration on each VTEP.
   • BIt requires both the ingress and egress VTEPs to perform L3 routing for inter-subnet traffic.
   • CIt allows the ingress VTEP to perform both L2 bridging and L3 routing, while the egress VTEP only performs L2 forwarding.
   • DIt eliminates the need for SVIs on the VTEPs by using the EVPN control plane for routing decisions.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A network architect is comparing Asymmetric IRB and Symmetric IRB for a VXLAN EVPN deployment. The architect notes that Asymmetric IRB uses the destination VNI for routed traffic, while Symmetric IRB uses a dedicated L3 VNI. What is a key advantage of using a dedicated L3 VNI in Symmetric IRB?

   • AIt simplifies the EVPN control plane by reducing the number of routes advertised.
   • BIt reduces the number of VNIs required for inter-subnet routing.
   • CIt allows the egress VTEP to perform routing, balancing the load.
   • DIt eliminates the need for SVIs on the VTEPs.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   In Asymmetric IRB, how does the ingress VTEP learn the MAC address of a remote host?

   • AThrough a centralized MAC database that is manually configured.
   • BThrough the EVPN control plane, which advertises MAC addresses with their VTEP and VNI information.
   • CBy flooding all traffic to every VTEP until the destination responds.
   • DBy sending an ARP request to the destination host directly.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   What is a key difference between Asymmetric IRB and Symmetric IRB in terms of VNI usage?

   • AAsymmetric IRB uses the source VNI for encapsulation, while Symmetric IRB uses the destination VNI.
   • BBoth use the same VNI for all traffic, with no difference.
   • CAsymmetric IRB uses a single VNI for all traffic, while Symmetric IRB uses two VNIs.
   • DAsymmetric IRB uses two different VNIs (source and destination) for inter-subnet traffic, while Symmetric IRB uses a single VNI for both directions.
   Reveal Solution Discussion Select an answer first
6. 5expert · hard

   A network architect is designing a VXLAN EVPN fabric with multiple tenants. The design must minimize the number of VNIs required and simplify the configuration on VTEPs. The architect is considering Asymmetric IRB vs Symmetric IRB. Which factor most strongly favors Symmetric IRB?

   • ASymmetric IRB eliminates the need for EVPN route exchange for MAC addresses.
   • BSymmetric IRB uses a single L3 VNI per tenant, reducing the number of VNIs needed for inter-subnet routing.
   • CSymmetric IRB requires all VTEPs to have all VLANs configured, which simplifies troubleshooting.
   • DSymmetric IRB allows the ingress VTEP to perform routing without needing an SVI for the destination VLAN.
   Reveal Solution Discussion Select an answer first