Hi friend!
To support EVPN, five types of EVPN NLRIs are added to the BGP EVPN address family. (Network Layer Reachability Information, network layer reachability information) , that is, EVPN route:
Ethernet auto-discovery route (RT-1): advertises ES information on a site multi-homing network to implement features such as the split horizon, aliasing, and active/standby backup.
MAC/IP Advertisement Route(RT-2): advertises MAC/IP address information.
Inclusive Multicast Ethernet Tag Route (RT-3): advertises VTEPs and their VXLANs to which they belong, implementing automatic VTEP discovery, VXLAN tunnel establishment, and VXLAN broadcast table creation.
Ethernet segment route (RT-4): advertises information about the ES and its connected VTEPs, so as to discover other members of the VTEP redundancy group connected to the same ES, and to elect a designated forwarder (DF) among the redundancy groups.
IP Prefix Advertisement Route(RT-5): advertises imported external routes in the form of IP prefixes.
Please refer to the video https://support.huawei.com/enterprise/en/doc/EDOC1000184916?idPath=24030814|21432787|7923148|22896249|19896202
Hope to help you!