diff --git a/src/sonic-config-engine/sonic-cfggen b/src/sonic-config-engine/sonic-cfggen
index aebd4d0544f5..1efa4cced820 100755
--- a/src/sonic-config-engine/sonic-cfggen
+++ b/src/sonic-config-engine/sonic-cfggen
@@ -32,7 +32,7 @@ from functools import partial
 from minigraph import minigraph_encoder, parse_xml, parse_device_desc_xml, parse_asic_sub_role, parse_asic_switch_type
 from portconfig import get_port_config, get_breakout_mode
 from redis_bcc import RedisBytecodeCache
-from sonic_py_common.multi_asic import get_asic_id_from_name, get_asic_device_id
+from sonic_py_common.multi_asic import get_asic_id_from_name, get_asic_device_id, is_multi_asic
 from sonic_py_common import device_info
 from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector, SonicDBConfig, ConfigDBPipeConnector
 
@@ -349,7 +349,10 @@ def main():
         else:
             deep_update(data, parse_xml(minigraph, port_config_file=args.port_config, asic_name=asic_name, hwsku_config_file=args.hwsku_config))
         # check if minigraph parser has speed and lanes in PORT table
-        _must_field_by_yang(data, 'PORT', ['speed', 'lanes'])
+        # speed and lanes will not be present for default namespace for
+        # multi-asic platform.
+        if not is_multi_asic() or asic_name:
+            _must_field_by_yang(data, 'PORT', ['speed', 'lanes'])
 
     if args.device_description is not None:
         deep_update(data, parse_device_desc_xml(args.device_description))