From c9bb03ea364487542f0c0cf663ab0d67fdf23f5e Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Thu, 5 Oct 2023 12:44:39 +0200
Subject: [PATCH] Read default gateway for a subnet from a custom field in
 netbox

---
 templates/interfaces.j2 | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/templates/interfaces.j2 b/templates/interfaces.j2
index d86e240..3185a09 100644
--- a/templates/interfaces.j2
+++ b/templates/interfaces.j2
@@ -11,12 +11,14 @@ iface {{ iface.name }}
     vrf mgmt
 {% for ip in iface.ip_addresses %}
     address {{ ip.address }}
-{% set gw = query('netbox.netbox.nb_lookup', 'ip-addresses', api_filter=('tag=gateway parent=' + ip.address))|first %}
-{% if gw is defined %}
-    gateway {{ gw.value.address | ipaddr('address') }}
+{% set subnet = ip.address | ipaddr('subnet') %}
+{% set prefix = query('netbox.netbox.nb_lookup', 'prefixes', api_filter=('prefix='+subnet))|first %}
+{% set gateway = prefix.value.custom_fields.gateway.address %}
+{% if gateway is defined %}
+    gateway {{ gateway | ipaddr('address') }}
 {% endif %}
 {% endfor %}
 
 {% endfor %}
 
-source /etc/network/interfaces.d/*
\ No newline at end of file
+source /etc/network/interfaces.d/*