# IPs
172.31.0.170 - debian1 - 2003:ca:1f4a:9e2a:5054:ff:fe32:c303
172.31.0.171 - debian2 - 2003:ca:1f4a:9e2a:5054:ff:fe32:c3e9
172.31.0.128 - debian3 - 2003:ca:1f4a:9e2a:5054:ff:fe32:c302

# Route Reflector

ai frr

vim /etc/frr/daemons
# enable bgpd

/etc/init.d/frr restart

vtysh
conf t
router bgp 65000
  bgp router-id 172.31.0.170
  bgp cluster-id 172.31.0.170
  bgp log-neighbor-changes
  no bgp default ipv4-unicast
  neighbor fabric peer-group
  neighbor fabric remote-as 65000
  neighbor fabric capability extended-nexthop
  neighbor fabric update-source 2003:ca:1f4a:9e2a:5054:ff:fe32:c303
  bgp listen range 2003:ca:1f4a:9e2a::/64 peer-group fabric
  address-family l2vpn evpn
   neighbor fabric activate
   neighbor fabric route-reflector-client
  exit-address-family

# VTEP one

ai frr bridge-utils

vim /etc/frr/daemons
# enable bgpd

/etc/init.d/frr restart

for vni in 100 200; do
        ip link add vni${vni} type vxlan id ${vni} dstport 4789 local 2003:ca:1f4a:9e2a:5054:ff:fe32:c3e9 nolearning
        ip link set vni${vni} addrgenmode none
        ip link set vni${vni} addr 0E:00:00:00:00:01
        brctl addbr br${vni}
        ip link set br${vni} addrgenmode none
        ip link set br${vni} addr 0E:00:00:00:00:02
        brctl addif br${vni} vni${vni}
        brctl stp br${vni} off
        ip link set up dev br${vni}
        ip link set up dev vni${vni}
done

vtysh
conf t
router bgp 65000
  bgp router-id 172.31.0.171
  no bgp default ipv4-unicast
  neighbor fabric peer-group
  neighbor fabric remote-as 65000
  neighbor fabric capability extended-nexthop
  neighbor 2003:ca:1f4a:9e2a:5054:ff:fe32:c303 peer-group fabric
  address-family l2vpn evpn
   neighbor fabric activate
   advertise-all-vni
   advertise-svi-ip
  exit-address-family

# VTEP two

ai frr bridge-utils

vim /etc/frr/daemons
# enable bgpd

/etc/init.d/frr restart

for vni in 100 200; do
        ip link add vni${vni} type vxlan id ${vni} dstport 4789 local 2003:ca:1f4a:9e2a:5054:ff:fe32:c302 nolearning
        ip link set vni${vni} addrgenmode none
        ip link set vni${vni} addr 0E:00:00:00:00:03
        brctl addbr br${vni}
        ip link set br${vni} addrgenmode none
        ip link set br${vni} addr 0E:00:00:00:00:04
        brctl addif br${vni} vni${vni}
        brctl stp br${vni} off
        ip link set up dev br${vni}
        ip link set up dev vni${vni}
done

vtysh
conf t
router bgp 65000
  bgp router-id 172.31.0.128
  no bgp default ipv4-unicast
  neighbor fabric peer-group
  neighbor fabric remote-as 65000
  neighbor fabric capability extended-nexthop
  neighbor 2003:ca:1f4a:9e2a:5054:ff:fe32:c303 peer-group fabric
  address-family l2vpn evpn
   neighbor fabric activate
   advertise-all-vni
   advertise-svi-ip
  exit-address-family

# Debugging
show bgp l2vpn evpn route
show evpn mac vni 100
show interface vni100

# References
https://docs.frrouting.org/en/latest/evpn.html