From 2f7f5425d89abe2af2d11dabb2b774a62cf3aa05 Mon Sep 17 00:00:00 2001
From: Jeremy Stretch <jstretch@digitalocean.com>
Date: Tue, 30 Jan 2018 16:20:50 -0500
Subject: [PATCH] Fixes #1848: Allow null value for interface encapsulation
 mode

---
 netbox/dcim/forms.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index d13e45766..2f5f66750 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -1778,7 +1778,7 @@ class InterfaceCreateForm(ComponentForm, ChainedFieldsMixin):
     mac_address = MACAddressFormField(required=False, label='MAC Address')
     mgmt_only = forms.BooleanField(required=False, label='OOB Management')
     description = forms.CharField(max_length=100, required=False)
-    mode = forms.ChoiceField(choices=IFACE_MODE_CHOICES)
+    mode = forms.ChoiceField(choices=add_blank_choice(IFACE_MODE_CHOICES), required=False)
     site = forms.ModelChoiceField(
         queryset=Site.objects.all(),
         required=False,