JN0-683 · Question #5
You are setting up an EVPN-VXLAN architecture for your new data center. Its initial deployment will be less than 50 switches; however, it could scale up to 250 switches over time supporting 1024…
The correct answer is A. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance. C. Symmetric routing supports higher scaling numbers. Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance: Symmetric routing requires an additional VLAN (and corresponding VNI) with an IRB interface for every Layer 3 VRF instance, supporting inter-VLAN routing at every VTEP. Symmetric routing…
Question
You are setting up an EVPN-VXLAN architecture for your new data center. Its initial deployment will be less than 50 switches; however, it could scale up to 250 switches over time supporting 1024 VLANs. You are still deciding whether to use symmetric or asymmetric routing. In this scenario, which two statements are correct? (Choose two.)
Options
- ASymmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance.
- BAsymmetric routing is easier lo monitor because of the transit VNI.
- CSymmetric routing supports higher scaling numbers.
- DAsymmetric routing routes traffic on the egress switch.
How the community answered
(14 responses)- A71% (10)
- B7% (1)
- D21% (3)
Explanation
Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance: Symmetric routing requires an additional VLAN (and corresponding VNI) with an IRB interface for every Layer 3 VRF instance, supporting inter-VLAN routing at every VTEP. Symmetric routing supports higher scaling numbers: Symmetric routing is preferred for environments with high scaling needs (such as 1024 VLANs and up to 250 switches) because it avoids the scalability limitations seen in asymmetric routing, which requires all VLANs and VNIs to be configured on every switch, leading to configuration complexity and overhead.
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