Understanding BGP EVPN and VXLAN Routing

EVPN (Ethernet VPN) with VXLAN is used for data center networking and L3 VPN interconnection.

???? BGP EVPN Route Types & Their Purpose

Type 2: MAC/IP Advertisement Route (Carries MAC + IP)

Type 3: Inclusive Multicast Route (Carries VTEP Multicast Information)

Type 5: IP Prefix Route (Used for Layer 3 VXLAN Routing)

???? What does Type 5 route contain?

✅ Route Distinguisher (RD): Identifies a unique VPN instance.

✅ GW IP Address: Specifies the Gateway IP for L3 VXLAN routing.

✅ IP Prefix Length: Defines the IPv4/IPv6 network mask for routing.

❌ MAC Address is NOT included in Type 5

Why is Option B (MAC Address) Correct?

✅ MAC addresses are carried in EVPN Type 2 routes, NOT in Type 5.

✅ Type 5 routes focus on IP prefixes, not MAC forwarding.

???? Real-World Application:

VXLAN L3 Gateways (EVPN Type 5) allow routers to forward IP traffic across VXLAN tunnels, removing the need for traditional L3 VPNs.

✅ Reference: Huawei HCIE-Datacom Guide – BGP EVPN and VXLAN Routing