diff --git a/roles/exit/templates/frr.conf.j2 b/roles/exit/templates/frr.conf.j2
index 059a5ff..39c35e1 100644
--- a/roles/exit/templates/frr.conf.j2
+++ b/roles/exit/templates/frr.conf.j2
@@ -11,8 +11,16 @@ 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 }}
+{# Add default routes for IPv4 and IPv6. Both are over link-local addresses. #}
+{% set uplink = interfaces | selectattr('name', '==', iface_uplink) | first %}
+{% for address in uplink.ip_addresses %}
+{% set gateway = address.address | ipmath(1) %}
+{% if address.family.value == 4 %}
+  ip route 0.0.0.0/0 {{ gateway }} {{ iface_uplink }}
+{% else %}
+  ipv6 route ::/0 {{ gateway }} {{ iface_uplink }}
+{% endif %}
+{% endfor %}
 
 # Route installation into kernel fails (rarely) without this option.
 # It is not documented anywhere and appears to be a Cumulus extension.