sonic-buildimage/dockers/docker-fpm-frr/bgpd.conf.default.j2

!
{% if DEVICE_METADATA['localhost'].has_key('bgp_asn') %}
{% block bgp_init %}
!
! bgp multiple-instance
!
route-map FROM_BGP_SPEAKER_V4 permit 10
!
route-map TO_BGP_SPEAKER_V4 deny 10
!
{# generate loopback prefix-lists #}
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if prefix | ipv4 and name == 'Loopback0' %}
ip prefix-list PL_LoopbackV4 permit {{ prefix | ip }}/32
{% elif prefix | ipv6 and name == 'Loopback0' %}
ipv6 prefix-list PL_LoopbackV6 permit {{ prefix | replace('/128', '/64') | ip_network }}/64
{% endif %}
{% endfor %}
!
{# generate default peer route-maps #}
!
route-map TO_BGP_PEER_V4 permit 100
!
route-map TO_BGP_PEER_V6 permit 100
!
{% if DEVICE_METADATA['localhost']['type'] == 'InternalFrontend' %}
route-map HIDE_INTERNAL permit 10
  set community local-AS
!
{% endif %}
{% if DEVICE_METADATA['localhost']['type'] == 'InternalBackend' %}
route-map OVERRIDE_ORIGINATOR_ID permit 10
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if prefix | ipv4 and name == 'Loopback0' %}
  set originator-id {{ prefix | ip }}
{% endif %}
{% endfor %}
!
{% endif %}
{% if BGP_MONITORS is defined and BGP_MONITORS|length > 0 %}
route-map FROM_BGPMON deny 10
!
route-map TO_BGPMON permit 10
!
{% endif %}
!
route-map ISOLATE permit 10
  set as-path prepend {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
!
route-map set-next-hop-global-v6 permit 10
  set ipv6 next-hop prefer-global
!
router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
{% if DEVICE_METADATA['localhost']['type'] == 'InternalFrontend' %}
  redistribute connected route-map HIDE_INTERNAL
{% endif %}
  bgp log-neighbor-changes
  bgp bestpath as-path multipath-relax
  no bgp default ipv4-unicast
  bgp graceful-restart restart-time 240
  bgp graceful-restart
{% if DEVICE_METADATA['localhost']['type'] == 'ToRRouter' %}
  bgp graceful-restart preserve-fw-state
{% endif %}
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if prefix | ipv4 and name == 'Loopback0' %}
  bgp router-id {{ prefix | ip }}
{% endif %}
{% endfor %}
{# advertise loopback #}
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if prefix | ipv4 and name == 'Loopback0' %}
  network {{ prefix | ip }}/32
{% elif prefix | ipv6 and name == 'Loopback0' %}
  address-family ipv6
    network {{ prefix | ip }}/64
  exit-address-family
{% endif %}
{% endfor %}
{% endblock bgp_init %}
{% endif %}
{% block vlan_advertisement %}
{% for (name, prefix) in VLAN_INTERFACE|pfx_filter %}
{% if prefix | ipv4 %}
  network {{ prefix }}
{% elif prefix | ipv6 %}
  address-family ipv6
   network {{ prefix }}
  exit-address-family
{% endif %}
{% endfor %}
{% endblock vlan_advertisement %}
{% block maximum_paths %}
  address-family ipv4
    maximum-paths 64
  exit-address-family
  address-family ipv6
    maximum-paths 64
  exit-address-family
{% endblock maximum_paths %}
{% block peers_peer_group %}
  neighbor PEER_V4 peer-group
  neighbor PEER_V6 peer-group
  address-family ipv4
{% if DEVICE_METADATA['localhost']['type'] == 'ToRRouter' %}
    neighbor PEER_V4 allowas-in 1
{% endif %}
    neighbor PEER_V4 soft-reconfiguration inbound
    neighbor PEER_V4 route-map TO_BGP_PEER_V4 out
  exit-address-family
  address-family ipv6
{% if DEVICE_METADATA['localhost']['type'] == 'ToRRouter' %}
    neighbor PEER_V6 allowas-in 1
{% endif %}
    neighbor PEER_V6 soft-reconfiguration inbound
    neighbor PEER_V6 route-map TO_BGP_PEER_V6 out
  exit-address-family
{% endblock peers_peer_group %}
{% block bgp_peers_with_range %}
{% if BGP_PEER_RANGE %}
{% for bgp_peer in BGP_PEER_RANGE.values() %}
  neighbor {{ bgp_peer['name'] }} peer-group
  neighbor {{ bgp_peer['name'] }} passive
{% if bgp_peer['peer_asn'] is defined %}
  neighbor {{ bgp_peer['name'] }} remote-as {{ bgp_peer['peer_asn'] }}
{% else %}
  neighbor {{ bgp_peer['name'] }} remote-as {{ constants.deployment_id_asn_map[DEVICE_METADATA['localhost']['deployment_id']] }}
{% endif %}
  neighbor {{ bgp_peer['name'] }} ebgp-multihop 255
  neighbor {{ bgp_peer['name'] }} soft-reconfiguration inbound
{% if bgp_peer['src_address'] is defined %}
  neighbor {{ bgp_peer['name'] }} update-source {{ bgp_peer['src_address'] | ip }}
{% else %}
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if name == 'Loopback1' %}
  neighbor {{ bgp_peer['name'] }} update-source {{ prefix | ip }}
{% endif %}
{% endfor %}
{% endif %}
  neighbor {{ bgp_peer['name'] }} route-map FROM_BGP_SPEAKER_V4 in
  neighbor {{ bgp_peer['name'] }} route-map TO_BGP_SPEAKER_V4 out
{% for ip_range in bgp_peer['ip_range'] %}
  bgp listen range {{ip_range}} peer-group {{ bgp_peer['name'] }}
{% endfor %}
  address-family ipv4
    neighbor {{ bgp_peer['name'] }} activate
  exit-address-family
  address-family ipv6
    neighbor {{ bgp_peer['name'] }} activate
  exit-address-family
{% endfor %}
{% endif %}
{% endblock bgp_peers_with_range %}
{% block bgp_monitors %}
{% if BGP_MONITORS is defined and BGP_MONITORS|length > 0 %}
  neighbor BGPMON peer-group
{% for (name, prefix) in LOOPBACK_INTERFACE|pfx_filter %}
{% if prefix | ipv4 and name == 'Loopback0' %}
  neighbor BGPMON update-source {{ prefix | ip }}
{% endif %}
{% endfor %}
  neighbor BGPMON route-map FROM_BGPMON in
  neighbor BGPMON route-map TO_BGPMON out
  neighbor BGPMON send-community
  neighbor BGPMON maximum-prefix 1
{% for neighbor_addr, bgp_session in BGP_MONITORS.items() %}
  neighbor {{ neighbor_addr }} remote-as {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
  neighbor {{ neighbor_addr }} peer-group BGPMON
  neighbor {{ neighbor_addr }} description {{ bgp_session['name'] }}
  neighbor {{ neighbor_addr }} activate
{% if DEVICE_METADATA['localhost']['type'] == 'InternalBackend' %}
  neighbor {{ neighbor_addr }} route-map OVERRIDE_ORIGINATOR_ID in
{% endif %}
  address-family ipv6
    neighbor {{ neighbor_addr }} activate
  exit-address-family
{% endfor %}
{% endif %}
{% endblock bgp_monitors %}
!