sonic-buildimage/dockers/docker-fpm-frr/frr/bgpd/templates/general/instance.conf.j2

!
! template: bgpd/templates/general/instance.conf.j2
!
  neighbor {{ neighbor_addr }} remote-as {{ bgp_session['asn'] }}
  neighbor {{ neighbor_addr }} description {{ bgp_session['name'] }}
{# set the bgp neighbor timers if they have not default values #}
{% if     (bgp_session['keepalive'] is defined and bgp_session['keepalive'] | int != 60)
      or  (bgp_session['holdtime'] is defined  and bgp_session['holdtime']  | int != 180) %}
  neighbor {{ neighbor_addr }} timers {{ bgp_session['keepalive'] | default("60") }} {{ bgp_session['holdtime'] | default("180") }}
{% endif %}
!
{% if 'admin_status' in bgp_session and bgp_session['admin_status'] == 'down' or 'admin_status' not in bgp_session and 'default_bgp_status' in CONFIG_DB__DEVICE_METADATA['localhost'] and CONFIG_DB__DEVICE_METADATA['localhost']['default_bgp_status'] == 'down' %}
  neighbor {{ neighbor_addr }} shutdown
{% endif %}
!
{% if neighbor_addr | ipv4 %}
  address-family ipv4
    neighbor {{ neighbor_addr }} peer-group PEER_V4
!
{% elif neighbor_addr | ipv6 %}
  address-family ipv6
    neighbor {{ neighbor_addr }} peer-group PEER_V6
!
{% endif %}
!
{%   if 'rrclient' in bgp_session and bgp_session['rrclient'] | int != 0 %}
    neighbor {{ neighbor_addr }} route-reflector-client
{%   endif %}
!
{%   if 'nhopself' in bgp_session and bgp_session['nhopself'] | int != 0 %}
    neighbor {{ neighbor_addr }} next-hop-self
{%   endif %}
!
    neighbor {{ neighbor_addr }} activate
  exit-address-family
!
{% if bgp_session["asn"] == bgp_asn and CONFIG_DB__DEVICE_METADATA['localhost']['type'] == "SpineChassisFrontendRouter" %}
  address-family l2vpn evpn
    neighbor {{ neighbor_addr }} activate
    advertise-all-vni
  exit-address-family
{% endif %}
!
! end of template: bgpd/templates/general/instance.conf.j2
!