JNCIP-DC: Juniper Networks Certified Professional – Data Center — Question 5

You are implementing an EVPN-VXLAN edge-routed bridging design using Layer 3 gateway operations.
In this scenario, which statement is correct?

Answer options

• A. Each distribution switch has unique IP addresses for IRB interfaces; routing protocols run on IRB interfaces.
• B. Distribution switches share the same anycast IP addresses for IRB interfaces; routing occurs at the distribution layer.
• C. Only core switches have IRB interfaces; all Layer 3 routing happens in the core.
• D. IRB interfaces are disabled; all routing happens through external routers only.

Correct answer: B

Explanation

Option B is correct because in an EVPN-VXLAN architecture, distribution switches typically use anycast IP addresses for IRB interfaces to facilitate efficient routing at that layer. Option A is incorrect as it suggests unique IPs, which is not how anycast is implemented, while Option C wrongly states that only core switches have IRB interfaces, ignoring the distribution layer's role. Option D is also incorrect since IRB interfaces are necessary for local routing within the EVPN-VXLAN framework.