Merge pull request #5227 from crnithya/pmtud_offload

gateway_mtu should be set on router ports only if node supports it

Author: girishmg

go-controller/pkg/ovn/base_network_controller.go

@@ -386,13 +386,19 @@ func (bnc *BaseNetworkController) syncNodeClusterRouterPort(node *corev1.Node, h
 		gwIfAddr := util.GetNodeGatewayIfAddr(hostSubnet)
 		lrpNetworks = append(lrpNetworks, gwIfAddr.String())
 	}
+
+	var lrpOptions map[string]string
+	enableGatewayMTU := util.ParseNodeGatewayMTUSupport(node)
+	if enableGatewayMTU {
+		lrpOptions = map[string]string{
+			"gateway_mtu": strconv.Itoa(config.Default.MTU),
+		}
+	}
 	logicalRouterPort := nbdb.LogicalRouterPort{
 		Name:     lrpName,
 		MAC:      nodeLRPMAC.String(),
 		Networks: lrpNetworks,
-		Options: map[string]string{
-			"gateway_mtu": strconv.Itoa(config.Default.MTU),
-		},
+		Options:  lrpOptions,
 	}
 	logicalRouter := nbdb.LogicalRouter{Name: logicalRouterName}
 	gatewayChassis := nbdb.GatewayChassis{