1 : Istall BGP v6

yum -y install bird6

2 : Example BIRD IPv6 Configuration

Info get tab BGP :

router id 139.180.217.144;

protocol bgp vultr
{
	local as 4288000276;
	source address 2001:19f0:4400:75d5:5400:04ff:fe36:89c0;
	import none;
	export all;
	graceful restart on;
	multihop 2;
	neighbor 2001:19f0:ffff::1 as 64515;
	password "IkitZ4NsxEW4MC2r";
}
protocol static {
route 2602:fafe:2::/48 via 2001:19f0:c:91d:5400:04ff:fe36:7719;
}
protocol device {
scan time 5;
}

3 : Add IPV6 TO ifcfg-eth0

# Created by cloud-init on instance boot automatically, do not edit.
#
BOOTPROTO=dhcp
DEVICE=eth0
HWADDR=56:00:04:36:89:c0
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_FORCE_ACCEPT_RA=yes
NM_CONTROLLED=no
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6ADDR_SECONDARIES="2602:fafe:2:1::/64"

systemctl restart bird6
systemctl restart network