diff --git a/filter_plugins/netbox.py b/filter_plugins/netbox.py
index 0932c41..02ad61a 100644
--- a/filter_plugins/netbox.py
+++ b/filter_plugins/netbox.py
@@ -14,19 +14,36 @@ class FilterModule(object):
             'iface_vlans': self.iface_vlans
         }
 
-    def compact_numlist(self, nums, sort=True, delimiter=',', range_delimiter='-'):
-        '''Transform [1,2,3,5,7,8,9] into "1-3,5,7-9"'''
+    def compact_numlist(self, nums, sort=True, delimiter=',', range_delimiter='-', max_per_line=None):
+        '''Transform [1,2,3,5,7,8,9] into "1-3,5,7-9".
+
+        If max_per_line is given, return a list of such strings where each string contains at most max_per_line+1 numbers.
+        This emulates how VLAN ranges are displayed by FS switches so we can make ansible check mode work correctly.
+        '''
         if sort:
             nums = sorted(nums)
         i = 0
-        spans = []
+        lines = []
+        line = []
+        nums_in_line = 0
         while i < len(nums):
             j = i + 1
             while j < len(nums) and nums[j]-nums[i] == j-i:
                 j += 1
-            spans += [f'{nums[i]}{range_delimiter}{nums[j-1]}' if j > i+1 else f'{nums[i]}']
+            if j > i+1:
+                line += [f'{nums[i]}{range_delimiter}{nums[j-1]}']
+                nums_in_line += 2
+            else:
+                line += [f'{nums[i]}']
+                nums_in_line += 1
+            if max_per_line and nums_in_line >= max_per_line:
+                lines += [delimiter.join(line)]
+                line = []
+                nums_in_line = 0
             i = j
-        return delimiter.join(spans)
+        if line:
+            lines += [delimiter.join(line)]
+        return lines if max_per_line else lines[0]
 
     def device_address(self, device):
         '''Return loopback IP addresses for an L3 attached device'''
diff --git a/roles/access/templates/config-fs.j2 b/roles/access/templates/config-fs.j2
index 6715715..b127495 100644
--- a/roles/access/templates/config-fs.j2
+++ b/roles/access/templates/config-fs.j2
@@ -6,7 +6,9 @@ no enable service telnet-server
 no enable service web-server http
 no enable service web-server https
 
-vlan range {{ vlans | map(attribute='vid') | union([1]) | compact_numlist }}
+{% for vlan_range in vlans | map(attribute='vid') | union([1]) | compact_numlist(max_per_line=19) %}
+vlan range {{ vlan_range }}
+{% endfor %}
 
 {% for iface in interfaces %}
 interface {{ iface.name }}
@@ -37,6 +39,9 @@ interface {{ iface.name }}
 {%- elif iface.mode and iface.mode.value == 'tagged' %}
  switchport mode trunk
  switchport trunk allowed vlan only {{ (iface.tagged_vlans or vlans) | map(attribute='vid') | compact_numlist }}
+{%- elif iface.mode and iface.mode.value == 'tagged-all' %}
+ switchport mode uplink
+ switchport trunk allowed vlan only 2-4094
 {% endif %}
 
 {% endif %}