EVPN-VXLAN 3

Question 1

What is an L2 VNI used for?

Answer 1

Mapping a VLAN to a VXLAN segment for Layer 2 bridging.

Question 2

What is an L3 VNI used for?

Answer 2

L3 VNI enables inter-subnet routing across the VXLAN fabric using EVPN Type-5 routes.

Question 3

What is an anycast gateway in EVPN-VXLAN?

Answer 3

A shared gateway IP/MAC across all leaf switches, enabling local L3 forwarding.

Question 4

How does EVPN reduce flooding in VXLAN fabrics?

Answer 4

It uses MP-BGP to distribute MAC and IP learning, avoiding traditional Layer 2 flooding.

Question 5

Why Use Distributed Anycast Gateway in VXLAN/EVPN?

Answer 5

Distributed Anycast Gateway:

• Hosts are connected to multiple leaf switches.
• Leaf switches advertise the same gateway IP and MAC (anycast gateway).
• Leaf switch performs local routing.