Adding rule for for MTU validations

plugins/action/common/prepare_plugins/prep_003_list_defaults.py

@@ -206,10 +206,10 @@ def prepare(self):
         if fabric_type in ['VXLAN_EVPN', 'External', 'eBGP_VXLAN']:
             fn = self.data_model['vxlan']['fabric']['name']
             if not bool(self.data_model['vxlan'].get('underlay')):
-                msg = "((vxlan.underlay)) data is empty! Check your host_vars model data for fabric {fn}."
+                msg = f"((vxlan.underlay)) data is empty! Check your host_vars model data for fabric {fn}."
                 display.warning(msg=msg, formatted=True)
             if not bool(self.data_model['vxlan'].get('global')):
-                msg = "((vxlan.global)) data is empty! Check your host_vars model data for fabric {fn}."
+                msg = f"((vxlan.global)) data is empty! Check your host_vars model data for fabric {fn}."
                 display.warning(msg=msg, formatted=True)
 
         self.kwargs['results']['model_extended'] = self.data_model

plugins/action/common/prepare_plugins/prep_107_topology_interfaces_mtu.py

@@ -0,0 +1,165 @@
+# Copyright (c) 2025 Cisco Systems, Inc. and its affiliates
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# SPDX-License-Identifier: MIT
+
+
+# Convert schema values of L2 MTU interfaces to the required format ('default' or 'jumbo')
+
+from ansible_collections.cisco.nac_dc_vxlan.plugins.plugin_utils.helper_functions import data_model_key_check
+from ansible_collections.cisco.nac_dc_vxlan.plugins.plugin_utils.helper_functions import normalize_interface_name
+
+
+class PreparePlugin:
+    def __init__(self, **kwargs):
+        self.kwargs = kwargs
+        self.keys = []
+
+    def get_parent_interface_name_mtu(self, sub_interface_name, switch_interfaces, default_routed_int_mtu, default_port_channel_mtu):
+        parent_interface_name = normalize_interface_name(sub_interface_name).split('.')[0]
+        parent_interface_mtu = 0
+        for interface in switch_interfaces:
+            if parent_interface_name == normalize_interface_name(interface.get('name')):
+                if interface.get('mtu'):
+                    parent_interface_mtu = interface.get('mtu')
+                    break
+        if not parent_interface_mtu:
+            if 'Port-channel' in parent_interface_name:
+                parent_interface_mtu = default_port_channel_mtu
+            else:
+                parent_interface_mtu = default_routed_int_mtu
+        return parent_interface_name, parent_interface_mtu
+
+    # layer2_host_interface_mtu must be an even int or 'default'
+    def standarize_global_l2_mtu(self, mtu):
+        if mtu == 'default':
+            return 1500
+        if mtu % 2 == 0:
+            return mtu
+        self.kwargs['results']['failed'] = True
+        self.kwargs['results']['msg'] = f'vxlan.underlay.general.layer2_host_interface_mtu is not a valid value ({mtu}). MTU cannot be an odd number.'
+        return None
+
+    # Validate that the interfaces mtu is correct, either default, jumbo, 1500 or the value of layer2_host_interface_mtu (sysmtem jumbomtu)
+    def standarize_l2_mtu(self, switch_name, interface, system_mtu):
+        interface_mtu = interface.get('mtu')
+        interface_name = normalize_interface_name(interface.get('name'))
+        if interface_mtu == 1500:
+            return 'default'
+        if interface_mtu == system_mtu:
+            return 'jumbo'
+        if interface_mtu in ('jumbo', 'default'):
+            return interface_mtu
+        self.kwargs['results']['failed'] = True
+        # Adding space if previous errors exist if not initialize str
+        if self.kwargs['results']['msg']:
+            self.kwargs['results']['msg'] += ' '
+        else:
+            self.kwargs['results']['msg'] = ''
+        self.kwargs['results']['msg'] += f'vxlan.topology.switches.{switch_name}.interfaces.{interface_name}.mtu ({interface_mtu}) is not a valid \
+value. MTU must be 1500 or {system_mtu}.'
+        return None
+
+    def prepare(self):
+        model_data = self.kwargs['results']['model_extended']
+        l2_jumbomtu = self.kwargs['default_values']['vxlan']['underlay']['general']['layer2_host_interface_mtu']
+        default_sub_interface_mtu = self.kwargs['default_values']['vxlan']['topology']['switches']['interfaces']['topology_switch_routed_sub_interface']['mtu']
+        default_routed_int_mtu = self.kwargs['default_values']['vxlan']['topology']['switches']['interfaces']['topology_switch_routed_interface']['mtu']
+        default_port_channel_mtu = self.kwargs['default_values']['vxlan']['topology']['switches']['interfaces']['topology_switch_routed_po_interface']['mtu']
+
+        dm_check = data_model_key_check(model_data, ['vxlan', 'underlay', 'general'])
+
+        # Check if vxlan.underlay.general is defined
+        if 'general' in dm_check['keys_data']:
+            if 'layer2_host_interface_mtu' in model_data['vxlan']['underlay']['general']:
+                l2_host_interface_mtu = model_data['vxlan']['underlay']['general']['layer2_host_interface_mtu']
+                l2_host_interface_mtu_standardized = self.standarize_global_l2_mtu(l2_host_interface_mtu)
+                model_data['vxlan']['underlay']['general']['layer2_host_interface_mtu'] = l2_host_interface_mtu_standardized
+                l2_jumbomtu = l2_host_interface_mtu_standardized
+
+            if 'intra_fabric_interface_mtu' in model_data['vxlan']['underlay']['general']:
+                intra_fabric_interface_mtu = model_data['vxlan']['underlay']['general']['intra_fabric_interface_mtu']
+                # intra_fabric_interface_mtu must be an even int
+                if intra_fabric_interface_mtu % 2 != 0:
+                    self.kwargs['results']['failed'] = True
+
+                    # Adding space if previous errors exist if not initialize str
+                    if self.kwargs['results']['msg']:
+                        self.kwargs['results']['msg'] += ' '
+                    else:
+                        self.kwargs['results']['msg'] = ''
+
+                    self.kwargs['results']['msg'] += f'vxlan.underlay.general.intra_fabric_interface_mtu is not a valid value \
+({intra_fabric_interface_mtu}). MTU cannot be an odd number.'
+
+        dm_check = data_model_key_check(model_data, ['vxlan', 'topology', 'switches'])
+
+        # Check if vxlan.topology is defined
+        if 'switches' in dm_check['keys_data']:
+            for switch_index, switch in enumerate(model_data.get('vxlan').get('topology').get('switches')):
+
+                switch_name = switch.get('name')
+
+                # loop through interfaces
+                for interface_index, interface in enumerate(switch.get('interfaces')):
+                    interface_mode = interface.get('mode')
+                    interface_name = normalize_interface_name(interface.get('name'))
+
+                    # L2 interfaces
+                    if interface_mode in ['access', 'trunk', 'dot1q']:
+                        if interface.get('mtu'):
+                            interface_mtu = self.standarize_l2_mtu(switch_name, interface, l2_jumbomtu)
+                            model_data['vxlan']['topology']['switches'][switch_index]['interfaces'][interface_index]['mtu'] = interface_mtu
+
+                    # L3 interfaces
+                    if interface_mode in ['routed', 'routed_po', 'routed_sub']:
+                        if interface.get('mtu'):
+                            interface_mtu = interface.get('mtu')
+                            # MTU must be an even number
+                            if interface_mtu % 2 != 0:
+                                self.kwargs['results']['failed'] = True
+                                # Adding space if previous errors exist if not initialize str
+                                if self.kwargs['results']['msg']:
+                                    self.kwargs['results']['msg'] += ' '
+                                else:
+                                    self.kwargs['results']['msg'] = ''
+
+                                self.kwargs['results']['msg'] += f'vxlan.topology.switches.{switch_name}.interfaces.{interface_name} is not a valid value \
+({interface_mtu}). MTU cannot be an odd number.'
+
+                    # Sub interfaces
+                    if interface_mode == 'routed_sub':
+                        parent_interface_name, parent_interface_mtu = self.get_parent_interface_name_mtu(interface_name, switch.get('interfaces'),
+                                                                                                         default_routed_int_mtu,
+                                                                                                         default_port_channel_mtu)
+                        sub_interface_mtu = interface.get('mtu') if interface.get('mtu') else default_sub_interface_mtu
+                        if parent_interface_mtu < sub_interface_mtu:
+                            self.kwargs['results']['failed'] = True
+                        # Adding space if previous errors exist if not initialize str
+                            if self.kwargs['results']['msg']:
+                                self.kwargs['results']['msg'] += ' '
+                            else:
+                                self.kwargs['results']['msg'] = ''
+
+                            self.kwargs['results']['msg'] += f'vxlan.topology.switches.{switch_name}.interfaces.\
+{normalize_interface_name(interface_name)}.mtu is not a valid value. {normalize_interface_name(interface_name)} MTU ({sub_interface_mtu}) \
+cannot be greater than {parent_interface_name} MTU ({parent_interface_mtu}).'
+
+        self.kwargs['results']['model_extended'] = model_data
+        return self.kwargs['results']

plugins/plugin_utils/helper_functions.py

@@ -25,6 +25,53 @@
 # For example in prepare_serice_model.py we can do the following:
 #  from ..helper_functions import do_something
 
+import re
+
+
+def normalize_interface_name(interface_name):
+    """
+    Normalize the interface name to the complete syntaxis:
+        Ethernet
+        Port-channel
+        Loopback
+    :Parameters:
+        :Interface Name (str): Name of the interfaces.
+    :Returns:
+        :interface_name (str): Normalized interface name.
+    :Raises:
+        N/A
+    """
+    # Replace 'eth' or 'e' followed by digits with 'Ethernet' followed by the same digits
+    interface_name = re.sub(
+        r"(?i)^(?:e|eth(?:ernet)?)(\d(?:\/\d+){1,2})$",
+        r"Ethernet\1",
+        interface_name,
+        flags=re.IGNORECASE,
+    )
+    # Replace 'Po' followed by digits with 'Port-channel' followed by the same digits
+    interface_name = re.sub(
+        r"(?i)^(po|port-channel)([1-9]|[1-9][0-9]{1,3}|[1-3][0-9]{3}|40([0-8][0-9]|9[0-6]))$",
+        r"Port-channel\2",
+        interface_name,
+        flags=re.IGNORECASE,
+    )
+    # Replace 'eth' or 'e' followed by digits with 'Ethernet' followed by the same digits (for sub interface)
+    interface_name = re.sub(
+        r"(?i)^(?:e|eth(?:ernet)?)(\d(?:\/\d+){1,2}\.\d{1,4})$",
+        r"Ethernet\1",
+        interface_name,
+        flags=re.IGNORECASE,
+    )
+    # Replace 'Lo' or 'Loopback' followed by digits with 'Loopback' followed by the same digits
+    interface_name = re.sub(
+        r"(?i)^(lo|loopback)([0-9]|[1-9][0-9]{1,2}|10[0-1][0-9]|102[0-3])$",
+        r"Loopback\2",
+        interface_name,
+        flags=re.IGNORECASE,
+    )
+    return interface_name
+
+
 def data_model_key_check(tested_object, keys):
     """
     Check if key(s) are found and exist in the data model.

tests/sanity/ignore-2.14.txt

@@ -6,9 +6,10 @@ plugins/action/common/prepare_plugins/prep_003_list_defaults.py action-plugin-do
 plugins/action/common/prepare_plugins/prep_104_topology_switches.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_105_fabric_overlay.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_106_topology_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_107_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_108_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_109_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_107_topology_interfaces_mtu.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_108_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_109_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_110_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_118_topology_edge_connections.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_999_verify.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_service_model.py action-plugin-docs # action plugin has no matching module to provide documentation

tests/sanity/ignore-2.15.txt

@@ -6,9 +6,10 @@ plugins/action/common/prepare_plugins/prep_003_list_defaults.py action-plugin-do
 plugins/action/common/prepare_plugins/prep_104_topology_switches.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_105_fabric_overlay.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_106_topology_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_107_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_108_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_109_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_107_topology_interfaces_mtu.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_108_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_109_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_110_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_118_topology_edge_connections.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_999_verify.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_service_model.py action-plugin-docs # action plugin has no matching module to provide documentation

tests/sanity/ignore-2.16.txt

@@ -6,9 +6,10 @@ plugins/action/common/prepare_plugins/prep_003_list_defaults.py action-plugin-do
 plugins/action/common/prepare_plugins/prep_104_topology_switches.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_105_fabric_overlay.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_106_topology_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_107_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_108_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
-plugins/action/common/prepare_plugins/prep_109_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_107_topology_interfaces_mtu.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_108_topology_vpc_interfaces.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_109_vrf_lites.py action-plugin-docs # action plugin has no matching module to provide documentation
+plugins/action/common/prepare_plugins/prep_110_route_control.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_118_topology_edge_connections.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_plugins/prep_999_verify.py action-plugin-docs # action plugin has no matching module to provide documentation
 plugins/action/common/prepare_service_model.py action-plugin-docs # action plugin has no matching module to provide documentation