network/roles/exit/templates/frr.conf.j2

{% set lo_address = interfaces | selectattr('name', '==', 'lo')
    | map(attribute='ip_addresses') | first
    | selectattr('role') | selectattr('role.value', '==', 'loopback')
    | map(attribute='address') %}
{% set my_index = inventory_hostname.split('-')[1]|int %}
{% set bridge = interfaces | selectattr('type') | selectattr('type.value', '==', 'bridge') | first %}
{% set bridge_vlans = vlans | selectattr('vid', 'in', bridge.tagged_vlans | map(attribute='vid')) -%}
{% set inside_vlans = bridge_vlans | selectattr('role.slug', '==', 'inside') -%}

frr defaults datacenter
log syslog informational
service integrated-vtysh-config

# Route to the outside world.
vrf outside
  ip route 0.0.0.0/0 {{ (interfaces | selectattr('name', '==', iface_uplink) | first).custom_fields.gateway.address | ipaddr('address') }} {{ iface_uplink }}
  ipv6 route ::/0 fe80::2 {{ iface_uplink }}

# Route installation into kernel fails (rarely) without this option.
# It is not documented anywhere and appears to be a Cumulus extension.
zebra nexthop proto only

router-id {{ lo_address | ipv4 | first | ipaddr('address') }}

# Default VRF.
router bgp {{ asn.asn }}
  bgp bestpath as-path multipath-relax

  neighbor fabric peer-group
  neighbor fabric remote-as external
  neighbor fabric capability extended-nexthop

  neighbor peerlink.4094 interface remote-as external
  neighbor peerlink.4094 capability extended-nexthop
  neighbor peerlink.4094 bfd 3 150 150

{% for iface in ifaces_fabric %}
  neighbor {{ iface }} interface peer-group fabric
  neighbor {{ iface }} bfd 3 150 150
{% endfor %}

  address-family ipv4 unicast
    redistribute connected route-map loopback

    neighbor fabric soft-reconfiguration inbound
    neighbor fabric route-map fabric->default in
    neighbor fabric route-map default->fabric out

    import vrf outside
    import vrf route-map default-import
  exit-address-family

  address-family ipv6 unicast
    redistribute connected route-map loopback

    neighbor fabric activate
    neighbor fabric soft-reconfiguration inbound
    neighbor fabric route-map fabric->default in
    neighbor fabric route-map default->fabric out

    import vrf outside
    import vrf route-map default-import
  exit-address-family

  address-family l2vpn evpn
    advertise-all-vni
    advertise-default-gw
    neighbor fabric activate
    neighbor peerlink.4094 activate
  exit-address-family


# Outside VRF. Direct route to the world, everything else goes to the firewall.
router bgp {{ asn.asn }} vrf outside
  bgp bestpath as-path multipath-relax

  neighbor peerlink.4 interface remote-as external
  neighbor peerlink.4 capability extended-nexthop
  neighbor peerlink.4 bfd 3 150 150

  neighbor firewall peer-group
  neighbor firewall remote-as external
  neighbor firewall capability extended-nexthop

{% for iface in ifaces_firewall %}
  neighbor {{ iface }}.4 interface peer-group firewall
  neighbor {{ iface }}.4 bfd 3 150 150
{% endfor %}

  address-family ipv4 unicast
    neighbor peerlink.4 soft-reconfiguration inbound
    neighbor peerlink.4 route-map peer.4->me in
    neighbor peerlink.4 route-map me->peer.4 out

    neighbor firewall allowas-in 1
    neighbor firewall default-originate
    neighbor firewall soft-reconfiguration inbound
    neighbor firewall route-map outside->firewall out
{% for iface in ifaces_firewall %}
    neighbor {{ iface }}.4 route-map firewall-{{ loop.index }}->outside in
{% endfor %}

    redistribute static
    redistribute connected route-map loopback-outside
    import vrf default
    import vrf route-map outside-import
  exit-address-family

  address-family ipv6 unicast
    neighbor peerlink.4 activate
    neighbor peerlink.4 allowas-in origin
    neighbor peerlink.4 soft-reconfiguration inbound
    neighbor peerlink.4 route-map peer.4->me in
    neighbor peerlink.4 route-map me->peer.4 out

    neighbor firewall activate
    neighbor firewall allowas-in 1
    neighbor firewall default-originate
    neighbor firewall soft-reconfiguration inbound
    neighbor firewall route-map outside->firewall out
{% for iface in ifaces_firewall %}
    neighbor {{ iface }}.4 route-map firewall-{{ loop.index }}->outside in
{% endfor %}

    redistribute static
    redistribute connected route-map loopback-outside
    import vrf default
    import vrf route-map outside-import
  exit-address-family


# Inside VRF. Default route via firewall. Direct routes to servers and offices.
router bgp {{ asn.asn }} vrf inside
  bgp bestpath as-path multipath-relax

  neighbor peerlink.2 interface remote-as external
  neighbor peerlink.2 capability extended-nexthop
  neighbor peerlink.2 bfd 3 150 150

  neighbor firewall peer-group
  neighbor firewall remote-as external
  neighbor firewall capability extended-nexthop

{% for iface in ifaces_firewall %}
  neighbor {{ iface }}.2 interface peer-group firewall
  neighbor {{ iface }}.2 bfd 3 150 150
{% endfor %}

  address-family ipv4 unicast
    neighbor peerlink.2 soft-reconfiguration inbound
    neighbor peerlink.2 route-map peer.2->me in
    neighbor peerlink.2 route-map me->peer.2 out

    neighbor firewall allowas-in 1
    neighbor firewall soft-reconfiguration inbound
    neighbor firewall route-map inside->firewall out
{% for iface in ifaces_firewall %}
    neighbor {{ iface }}.2 route-map firewall-{{ loop.index }}->inside in
{% endfor %}

    redistribute connected route-map loopback-inside
{% for vlan in inside_vlans %}
    import vrf {{ vlan.name }}
{% endfor %}
    import vrf default
    import vrf route-map inside-import
  exit-address-family

  address-family ipv6 unicast
    neighbor peerlink.2 activate
    neighbor peerlink.2 soft-reconfiguration inbound
    neighbor peerlink.2 route-map peer.2->me in
    neighbor peerlink.2 route-map me->peer.2 out

    neighbor firewall activate
    neighbor firewall allowas-in 1
    neighbor firewall soft-reconfiguration inbound
    neighbor firewall route-map inside->firewall out
{% for iface in ifaces_firewall %}
    neighbor {{ iface }}.2 route-map firewall-{{ loop.index }}->inside in
{% endfor %}

    redistribute connected route-map loopback-inside
{% for vlan in inside_vlans %}
    import vrf {{ vlan.name }}
{% endfor %}
    import vrf default
    import vrf route-map inside-import
  exit-address-family


{% for vlan in inside_vlans %}
# VRF for L2 network {{ vlan.name }}. Imports gateway from inside VRF.
router bgp {{ asn.asn }} vrf {{ vlan.name }}
  bgp bestpath as-path multipath-relax

  address-family ipv4 unicast
    redistribute connected
    import vrf inside
    import vrf route-map office-import
  exit-address-family

  address-family ipv6 unicast
    redistribute connected
    import vrf inside
    import vrf route-map office-import
  exit-address-family

{% endfor %}

# Prefix lists.
ip prefix-list default permit 0.0.0.0/0
ipv6 prefix-list default permit ::/0

ip prefix-list fabric permit 10.34.0.0/24 ge 32
ipv6 prefix-list fabric permit 2001:1470:fffd:3400::/64 ge 128

{% for vlan in inside_vlans %}
{% set prefixes = query('netbox.netbox.nb_lookup', 'prefixes', api_filter='vlan_id='~vlan.id, raw_data=true)
        | sort(attribute='family.value') %}
{% for prefix in prefixes %}
{% if prefix.family.value == 4 %}
ip prefix-list office permit {{ prefix.prefix }} ge 24
{% else %}
ipv6 prefix-list office permit {{ prefix.prefix }} ge 64
{% endif %}
{% endfor %}
{% endfor %}

{% if wg_net is defined %}
ip prefix-list vpn permit {{ wg_net | ipaddr('subnet') }}
{% endif %}
{% if wg_net6 is defined %}
ipv6 prefix-list vpn permit {{ wg_net6 | ipaddr('subnet') }}
{% endif %}

ip prefix-list nat permit {{ wg_ip | ipaddr('host') }}
{% for network in nat %}
ip prefix-list nat permit {{ network }}
{% endfor %}

{% for prefix in query('netbox.netbox.nb_lookup', 'prefixes', raw_data=true, api_filter='role=bgp') | selectattr('tenant') %}
{% if prefix.family.value == 4 %}
ip prefix-list dc permit {{ prefix.prefix }} ge 32
{% else %}
ipv6 prefix-list dc permit {{ prefix.prefix }} ge 64
{% endif %}
{% endfor %}

# Route maps for redistributing own IPs from various VRFs.
route-map loopback permit 1
  match interface lo
route-map loopback-inside permit 1
  match interface inside
route-map loopback-outside permit 1
  match interface outside

# Route maps for importing between VRFs.
route-map default-import permit 10
  match ip address prefix-list default
route-map default-import permit 11
  match ipv6 address prefix-list default
route-map default-import permit 21
  match ipv6 address prefix-list office
route-map default-import permit 30
  match ip address prefix-list nat
route-map default-import permit 31
  match ipv6 address prefix-list vpn

route-map outside-import permit 10
  match ip address prefix-list dc
route-map outside-import permit 11
  match ipv6 address prefix-list dc

route-map office-import permit 10
  match ip address prefix-list default
route-map office-import permit 11
  match ipv6 address prefix-list default

route-map inside-import permit 20
  match ip address prefix-list office
route-map inside-import permit 21
  match ipv6 address prefix-list office

# Route maps for advertised and received routes.
# Inside ↔ fabric.
route-map default->fabric permit 10
  match ip address prefix-list default
route-map default->fabric permit 11
  match ipv6 address prefix-list default
route-map default->fabric permit 20
  match ip address prefix-list fabric

route-map fabric->default permit 10
  match ip address prefix-list fabric
route-map fabric->default permit 20
  match ip address prefix-list dc
route-map fabric->default permit 21
  match ipv6 address prefix-list dc

# Inside ↔ firewall.
route-map inside->firewall permit 1
  match interface lo
route-map inside->firewall permit 20
  match ip address prefix-list office
route-map inside->firewall permit 21
  match ipv6 address prefix-list office

route-map firewall->inside permit 1
  match ip address prefix-list fabric
route-map firewall->inside permit 2
  match ipv6 address prefix-list fabric
route-map firewall->inside permit 10
  match ip address prefix-list default
route-map firewall->inside permit 11
  match ipv6 address prefix-list default

# Outside ↔ firewall.
route-map outside->firewall permit 10
  match ip address prefix-list default
route-map outside->firewall permit 11
  match ipv6 address prefix-list default

route-map firewall->outside permit 1
  match ip address prefix-list fabric
route-map firewall->outside permit 2
  match ipv6 address prefix-list fabric
route-map firewall->outside permit 21
  match ipv6 address prefix-list office
route-map firewall->outside permit 30
  match ip address prefix-list nat
route-map firewall->outside permit 31
  match ipv6 address prefix-list vpn

# Tag routes from each firewall. Set weight for primary to 200 and secondary to 100.
{% for firewall in ifaces_firewall %}
route-map firewall-{{ loop.index }}->inside permit 1
  set tag {{ loop.index }}
  set weight {{ 100 * loop.index }}
  call firewall->inside
route-map firewall-{{ loop.index }}->outside permit 1
  set tag {{ loop.index }}
  set weight {{ 100 * loop.index }}
  call firewall->outside
{% endfor %}

# Backup routes over peer link are announced to the peer with BGP
# metrics 190 and 90. These values are copied to weights by receiving
# peer, to be used alongside local routes with weights 200 and 100.
# These are the route maps for peerlink in the inside VRF.
{% for firewall in ifaces_firewall %}
{% set metric = 100 * loop.index - 10 %}
route-map me->peer.2 permit {{ loop.index }}
  match tag {{ loop.index }}
  on-match goto 100
  set metric {{ metric }}
route-map peer.2->me permit {{ loop.index }}
  match metric {{ metric }}
  on-match goto 100
  set weight {{ metric }}
{% endfor %}

# Advertised backup routes for paths that go through the firewall
# (default route).
route-map me->peer.2 permit 110
  match ip address prefix-list default
route-map me->peer.2 permit 111
  match ipv6 address prefix-list default

# Received backup routes (same as above).
route-map peer.2->me permit 110
  match ip address prefix-list default
route-map peer.2->me permit 111
  match ipv6 address prefix-list default

# These are the route maps for peerlink in the outside VRF.
{% for firewall in ifaces_firewall %}
{% set metric = 100 * loop.index - 10 %}
route-map me->peer.4 permit {{ loop.index }}
  match tag {{ loop.index }}
  on-match goto 100
  set metric {{ metric }}
route-map peer.4->me permit {{ loop.index }}
  match metric {{ metric }}
  on-match goto 100
  set weight {{ metric }}
{% endfor %}

# Backup routes for uplink and paths that go through the firewall
# (default route and NAT/IPv6 addresses for office networks).
route-map me->peer.4 permit 110
  match ip address prefix-list default
route-map me->peer.4 permit 111
  match ipv6 address prefix-list default
route-map me->peer.4 permit 120
  match ip address prefix-list nat
route-map me->peer.4 permit 121
  match ipv6 address prefix-list vpn
route-map me->peer.4 permit 131
  match ipv6 address prefix-list office

# Received backup routes (same as above).
route-map peer.4->me permit 110
  match ip address prefix-list default
route-map peer.4->me permit 111
  match ipv6 address prefix-list default
route-map peer.4->me permit 120
  match ip address prefix-list nat
route-map peer.4->me permit 121
  match ipv6 address prefix-list vpn
route-map peer.4->me permit 131
  match ipv6 address prefix-list office