sonic-buildimage/files/image_config/interfaces/interfaces.j2

#
{% block banner %}
# =============== Managed by SONiC Config Engine DO NOT EDIT! ===============
# generated from /usr/share/sonic/templates/interfaces.j2 using sonic-cfggen
# file: /etc/network/interfaces
#
{% endblock banner %}
{% block loopback %}
# The loopback network interface
auto lo
iface lo inet loopback
# Use command 'ip addr list dev lo' to check all addresses
{% for minigraph_lo_interface in minigraph_lo_interfaces %}
iface lo {{ 'inet' if minigraph_lo_interface['addr'] | ipv4 else 'inet6' }} static
    address {{ minigraph_lo_interface['addr'] }}
    netmask {{ minigraph_lo_interface['mask'] }}
#
{% endfor %}
{% endblock loopback %}
{% block mgmt_interface %}
# The management network interface
auto eth0
{% if minigraph_mgmt_interface['addr'] %}
iface eth0 inet static
    address {{ minigraph_mgmt_interface['addr'] }}
    netmask {{ minigraph_mgmt_interface['mask'] }}
    ########## management network policy routing rules
    # management port up rules
    up ip route add default via {{ minigraph_mgmt_interface['gwaddr'] }} dev eth0 table default
    up ip rule add from {{ minigraph_mgmt_interface['addr'] }}/32 table default
{% for prefix in forced_mgmt_routes %}
    up ip rule add to {{ prefix }} table default
{% endfor %}
    # management port down rules
    down ip route delete default via {{ minigraph_mgmt_interface['gwaddr'] }} dev eth0 table default
    down ip rule delete from {{ minigraph_mgmt_interface['addr'] }}/32 table default
{% for prefix in forced_mgmt_routes %}
    down ip rule delete to {{ prefix }} table default
{% endfor %}
{# TODO: COPP policy type rules #}
{% else %}
iface eth0 inet dhcp
{% endif %}
#
{% endblock mgmt_interface %}
{% block front_panel_interfaces %}
# The switch front panel interfaces
{% for interface in minigraph_interfaces %}
allow-hotplug {{ interface['attachto'] }}
iface {{ interface['attachto'] }} {{ 'inet' if interface['addr'] | ipv4 else 'inet6' }} static
    mtu 9216
    address {{ interface['addr'] }}
    netmask {{ interface['mask'] }}
#
{% endfor %}
{% if minigraph_vlans.keys() | length %}
# "|| true" is added to suppress the error when interface is already a member of VLAN
{% endif %}
{% for vlan in minigraph_vlans.keys()|sort %}
{% for member in minigraph_vlans[vlan]['members'] %}
allow-hotplug {{ member }}
iface {{ member }} inet manual
    pre-up ifconfig {{ member }} up mtu 9216
    post-up brctl addif {{ vlan }} {{ member }} || true
    post-down ifconfig {{ member }} down
#
{% endfor %}
{% endfor %}
{% if minigraph_portchannels.keys() | length %}
# "|| true" is added to suppress the error when interface is already a member of LAG
# "ip link show | grep -q master" is added to ensure interface is enslaved
{% endif %}
{% for pc in minigraph_portchannels.keys()|sort %}
{% for member in minigraph_portchannels[pc]['members'] %}
allow-hotplug {{ member }}
iface {{ member }} inet manual
    pre-up teamdctl {{ pc }} port add {{ member }} || true
    post-up ip link show {{ member }} | grep -q master && ifconfig {{ member }} up
    post-down ifconfig {{ member }} down
#
{% endfor %}
{% endfor %}
{% endblock front_panel_interfaces %}
{% if minigraph_vlans.keys() | length %}
{% block vlan_interfaces %}
# Vlan interfaces
{% for vlan_interface in minigraph_vlan_interfaces %}
auto {{ vlan_interface['attachto'] }}
iface {{ vlan_interface['attachto'] }} {{ 'inet' if vlan_interface['addr'] | ipv4 else 'inet6' }} static
    bridge_ports none
    address {{ vlan_interface['addr'] }}
    netmask {{ vlan_interface['mask'] }}
{% endfor %}
#
{% endblock vlan_interfaces %}
{% endif %}
{% if minigraph_portchannels.keys() | length %}
{% block pc_interfaces %}
# Portchannel interfaces
{% for pc_interface in minigraph_portchannel_interfaces %}
allow-hotplug {{ pc_interface['attachto'] }}
iface {{ pc_interface['attachto'] }} {{ 'inet' if pc_interface['addr'] | ipv4 else 'inet6' }} static
    mtu 9216
    address {{ pc_interface['addr'] }}
    netmask {{ pc_interface['mask'] }}
#
{% endfor %}
{% endblock pc_interfaces %}
{% endif %}