Add evpn ethernet-segment support for LAG interface

models/enterprise_sonic/lag_interfaces/deleted_example_01.txt

@@ -1,28 +1,40 @@
 # Using deleted
-
+#
 # Before state:
 # -------------
-# interface PortChannel10
-# !
+#
 # interface Eth1/10
 #  channel-group 10
 #  mtu 9100
 #  speed 100000
 #  no shutdown
-
-- name: Deletes LAG attributes of given interface (Note: This will  not delete the port-channel itself).
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-lacp
+#   df-preference 2222
+#
+- name: Deletes all LAGs and LAG attributes of all interfaces.
   sonic_lag_interfaces:
     config:
       - name: PortChannel10
         members:
           interfaces:
+            - member: Eth1/10
+        ethernet_segment:
+          esi_type: auto_lacp
     state: deleted
-
+#
 # After state:
-# ------------
-# interface PortChannel10
-# !
+# -------------
+#
 # interface Eth1/10
 #  mtu 9100
 #  speed 100000
 #  no shutdown
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#

models/enterprise_sonic/lag_interfaces/deleted_example_02.txt

@@ -2,10 +2,6 @@
 
 # Before state:
 # -------------
-# interface PortChannel 10
-# !
-# interface PortChannel 12
-# !
 # interface Eth1/10
 #  channel-group 10
 #  mtu 9100
@@ -17,6 +13,15 @@
 #  mtu 9100
 #  speed 100000
 #  no shutdown
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-lacp
+#  df-preference 2222
+# !
+# interface PortChannel 12
+#
 
 - name: Deletes all LAGs and LAG attributes of all interfaces.
   sonic_lag_interfaces:

models/enterprise_sonic/lag_interfaces/merged_example_01.txt

@@ -8,10 +8,7 @@
 #  speed 100000
 #  no shutdown
 # !
-# interface Eth1/15
-#  channel-group 12
-#  mtu 9100
-#  speed 100000
+# interface PortChannel10
 #  no shutdown
 
 - name: Merges provided configuration with device configuration.
@@ -21,6 +18,13 @@
         members:
           interfaces:
             - member: Eth1/10
+        ethernet_segment:
+          esi_type: auto_lacp
+          df_preference: 2222
+      - name: PortChannel12
+        members:
+          interfaces:
+            - member: Eth1/15
     state: merged
 
 # After state:
@@ -37,3 +41,12 @@
 #  mtu 9100
 #  speed 100000
 #  no shutdown
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-lacp
+#  df-preference 2222
+# !
+# interface PortChannel12
+#  no shutdown

models/enterprise_sonic/lag_interfaces/overridden_example_01.txt

@@ -4,9 +4,16 @@
 # -------------
 #
 # interface Eth1/5
-#   channel-group 10
-# interface Eth1/7
-#   channel-group 2
+#  channel-group 10
+# !
+# interface Eth1/6
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-system-mac
+#   df-preference 2222
+#
 
 - name: Override device configuration of all LAG attributes of given interfaces on device with provided configuration.
   sonic_lag_interfaces:
@@ -15,13 +22,21 @@
 	members:
           interfaces:
 	    - member: Eth1/6
+        ethernet_segment:
+          esi_type: auto_lacp
+          df_preference: 3333
     state: overridden
 
 # After state:
 # ------------
-# interface Eth1/7
-    no channel-group
 # interface Eth1/5
-    no channel-group
+#  no channel-group
+# !
 # interface Eth1/6
-#   channel-group 20
+#  channel-group 20
+# !
+# interface PortChannel20
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-lacp
+#  df-preference 3333

models/enterprise_sonic/lag_interfaces/replaced_example_01.txt

@@ -5,24 +5,58 @@
 #
 # interface Eth1/5
 #   channel-group 10
-# interface Eth1/6
-#   channel-group 20
+# !
+# interface Eth1/7
+#   no channel-group
+#   mtu 9100
+#   speed 100000
+#   no shutdown
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-lacp
+#   df-preference 2222
 
 - name: Replace device configuration of specified LAG attributes of given interfaces with provided configuration.
   sonic_lag_interfaces:
     config:
+      - name: PortChannel20
+        members:
+          interfaces:
+            - member: Eth1/6
+        ethernet_segment:
+          esi_type: auto_system_mac
+          df_preference: 6666
       - name: PortChannel10
 	members:
           interfaces:
 	    - member: Eth1/7
+        ethernet_segment:
+          esi_type: auto_system-mac
+          df_preference: 3333
     state: replaced
 
 # After state:
 # ------------
 #
-# interface Eth1/7
-#   channel-group 10
+# interface Eth1/5
+# !
 # interface Eth1/6
 #   channel-group 20
-# interface Eth1/5
-#   no channel-group
+# !
+# interface Eth1/7
+#   channel-group 10
+# !
+# interface PortChannel10
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-system-mac
+#  df-preference 3333
+# !
+# interface PortChannel20
+#  no shutdown
+#  !
+#  evpn ethernet-segment auto-system-mac
+#  df-preference 6666
+#

models/enterprise_sonic/lag_interfaces/sonic_lag_interfaces.yaml

@@ -52,6 +52,34 @@ DOCUMENTATION: |
           choices:
             - static
             - lacp
+        ethernet_segment:
+          description:
+            - Specifies Ethernet segment.
+          version_added: 2.5.0
+          type: dict
+          suboptions:
+            esi_type:
+              description:
+                - Specifies type of Ethernet Segment Identifier.
+                - esi_type and esi can not be deleted separately.
+                - If both esi and df_preference are not present,
+                - deleted state will delete whole ethernet segment.
+              required: True
+              type: str
+              choices:
+                - auto_lacp
+                - auto_system_mac
+                - ethernet_segment_id
+            esi:
+              description:
+                - Specifies value of Ethernet Segment Identifier.
+                - Only "AUTO" is supported for auto_lacp and auto_system_mac.
+              type: str
+            df_preference:
+              description:
+                - The preference for Designated Forwarder election method.
+                - The range of df_preference value is from 1 to 65535.
+              type: int
 
     state:
       description: