frr.j2

#!/bin/bash
#
set -e # Exit immediately when any command fails
#

{% set use_evpn = vxlan.flooding|default('') == 'evpn' %}

{% macro create_vxlan_interface(vni,br_name,vrf=None,mtu=1500) %}
if [ ! -e /sys/devices/virtual/net/vxlan{{ vni }} ]; then
  ip link add vxlan{{ vni }} type vxlan \
    id {{ vni }} \
    dstport 4789 \
    local {{ vxlan.vtep }} {{ 'nolearning' if use_evpn else '' }}
fi
#
# Add it to the VLAN bridge (create if needed for l3 vnis); disable STP
if [ ! -e /sys/devices/virtual/net/{{ br_name}} ]; then
  ip link add {{ br_name }} type bridge
  ip link set up dev {{ br_name }}
fi
ip link set dev vxlan{{ vni }} master {{ br_name }}
ip link set {{ br_name }} type bridge stp_state 0

# Do not generate ipv6 link-local address for VXLAN devices
ip link set mtu {{ mtu }} addrgenmode none dev vxlan{{ vni }}
{% if use_evpn %}
# Disable dynamic MAC learning for evpn, see https://docs.frrouting.org/en/latest/evpn.html
bridge link set dev vxlan{{ vni }} learning off
{% endif %}
ip link set up dev vxlan{{ vni }}
{% if vrf %}
ip link set {{ br_name }} master {{ vrf }}
{% endif %}
{% endmacro %}

# Create L3 VNIs with bridges and add to correct vrf table
{% set _mtu = mtu|default(1500) %}
{% if vrfs is defined %}
{%   for vname,vdata in vrfs.items() if 'evpn' in vdata and vdata.evpn.transit_vni is defined %}
{{     create_vxlan_interface(vdata.evpn.transit_vni, "tvni-"+vdata.vrfidx|string,vname,_mtu) }}
{%   endfor %}
{% endif %}

{% if vxlan.vlans is defined %}
{%   for vname in vxlan.vlans if vlans[vname].vni is defined %}
{%     set vlan = vlans[vname] %}
# Create VXLAN L2 interface per vni
{{ create_vxlan_interface(vlan.vni, "vlan" + vlan.id|string,None,vlan.mtu|default(_mtu)) }}
{%     if vlan.vtep_list is defined %}
{%       for remote_vtep in vlan.vtep_list %}
bridge fdb append 00:00:00:00:00:00 dev vxlan{{vlan.vni}} dst {{ remote_vtep }}
{%       endfor %}
{%     endif %}
{%   endfor %}
{% endif %}

exit $?