Fixes #14706: Relax one-to-one mapping of tunnel termination to IP address

netbox/vpn/migrations/0003_ipaddress_multiple_tunnel_terminations.py

@@ -0,0 +1,20 @@
+# Generated by Django 4.2.8 on 2024-01-05 19:31
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ipam', '0069_gfk_indexes'),
+        ('vpn', '0002_move_l2vpn'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='tunneltermination',
+            name='outside_ip',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='tunnel_terminations', to='ipam.ipaddress'),
+        ),
+    ]

netbox/vpn/models/tunnels.py

@@ -129,10 +129,10 @@ class TunnelTermination(CustomFieldsMixin, CustomLinksMixin, TagsMixin, ChangeLo
         ct_field='termination_type',
         fk_field='termination_id'
     )
-    outside_ip = models.OneToOneField(
+    outside_ip = models.ForeignKey(
         to='ipam.IPAddress',
         on_delete=models.PROTECT,
-        related_name='tunnel_termination',
+        related_name='tunnel_terminations',
         blank=True,
         null=True
     )