BGP EVPN Control Plane

In network routing, the control plane is the part of the router architecture that is concerned with drawing the network topology, or the information in a routing table that defines what to do with incoming packets.

Supported EVPN route types


Type	Description
1	Ethernet Auto Discovery (AD) route
2	MAC/IP advertisement route
3	Inclusive Multicast Route
4	Ethernet Segment Route
5	IPv4/IPv6 Prefix Route
7	IGMP Join Synch Route
8	IGMP Leave Synch Route

Supported BGP features

The following features are supported for the BGP EVPN address-family:

iBGP and eBGP peering
IPv4 and IPv6 peer types
Peer groups with EVPN neighbors
Ability to negotiate only EVPN address-family for IPv4 or IPv6 peers
iBGP route reflector server
Keeping next-hop unchanged for EBGP peers
Ability to retain all EVPN routes without importing them
Coexistence of all IPv4 and IPv6 BGP features for neighbors negotiating EVPN address-family
EVPN spine, leaf, and border leaf functions

Supported data plane encapsulation

VxLAN data plane encapsulation is supported.

The BGP encapsulation extended-community attribute is carried with each route in the BGP control plane to signify the encapsulation to be used to reach the prefix. An EVPN route without an encapsulation extended-community attribute uses VxLAN encapsulation by default.

Supported service-interface model

The VLAN-based service-interface model described in RFC 7432 is supported. Each VLAN is mapped to a unique VNI label. Within the data center, each VNI maps to a unique EVI. This mapping is referred to as the "single subnet per EVI" option in "draft-ietf-bess-evpn-overlay." No VLAN translation service is supported. In the data center, VNI-to-VLAN mapping is local to each leaf, and the inner VxLAN frames may not carry an Ethernet tag. The administrator is responsible for keeping this mapping consistent in the data center.