diff --git a/scripts/db_migrator.py b/scripts/db_migrator.py
index f50eb9cab0..91a915e53d 100755
--- a/scripts/db_migrator.py
+++ b/scripts/db_migrator.py
@@ -822,6 +822,21 @@ def migrate_flex_counter_delay_status_removal(self):
             self.configDB.set_entry('FLEX_COUNTER_TABLE', obj, flex_counter)
 
 
+    def migrate_frr_separate_config_mode (self):
+        """
+        Modify docker_routing_config_mode field.
+        """
+        log.log_notice('Migrate FRR Config mode configuration')
+        metadata = self.configDB.get_entry('DEVICE_METADATA', 'localhost')
+        if 'docker_routing_config_mode' not in metadata:
+            metadata['docker_routing_config_mode'] = "unified"
+            self.configDB.set_entry('DEVICE_METADATA', 'localhost', metadata)
+        else:
+            if metadata['docker_routing_config_mode'] == "separated" :
+                metadata['docker_routing_config_mode'] = "unified"
+                self.configDB.set_entry('DEVICE_METADATA', 'localhost', metadata)
+
+
     def migrate_sflow_table(self):
         """
         Migrate "SFLOW_TABLE" and "SFLOW_SESSION_TABLE" to update default sample_direction
@@ -1357,6 +1372,8 @@ def common_migration_ops(self):
         self.migrate_tacplus()
         self.migrate_aaa()
 
+        self.migrate_frr_separate_config_mode()
+
     def migrate(self):
         version = self.get_version()
         log.log_info('Upgrading from version ' + version)