diff --git a/pkg/compute/guestdrivers/virtualization.go b/pkg/compute/guestdrivers/virtualization.go
index 73d9e1f36f..49af53455d 100644
--- a/pkg/compute/guestdrivers/virtualization.go
+++ b/pkg/compute/guestdrivers/virtualization.go
@@ -28,7 +28,6 @@ import (
 	"yunion.io/x/onecloud/pkg/cloudcommon/db/quotas"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
 	"yunion.io/x/onecloud/pkg/compute/models"
-	"yunion.io/x/onecloud/pkg/compute/options"
 	"yunion.io/x/onecloud/pkg/httperrors"
 	"yunion.io/x/onecloud/pkg/mcclient"
 )
@@ -73,11 +72,11 @@ func (self *SVirtualizedGuestDriver) GetNamedNetworkConfiguration(guest *models.
 			Ifname: "",
 		})
 	}
-	reUse := false
-	if len(netConfig.Address) > 0 && !options.Options.EnablePreAllocateIpAddr && !utils.IsInStringArray(host.GetProviderName(), []string{api.CLOUD_PROVIDER_ONECLOUD, api.CLOUD_PROVIDER_VMWARE, api.CLOUD_PROVIDER_CLOUDPODS}) {
-		reUse = true
-	}
-	return net, nicConfs, api.IPAllocationStepdown, reUse, nil
+	// reUse := false
+	// if len(netConfig.Address) > 0 && !options.Options.EnablePreAllocateIpAddr && !utils.IsInStringArray(host.GetProviderName(), []string{api.CLOUD_PROVIDER_ONECLOUD, api.CLOUD_PROVIDER_VMWARE, api.CLOUD_PROVIDER_CLOUDPODS}) {
+	//	reUse = true
+	// }
+	return net, nicConfs, api.IPAllocationStepdown, false, nil
 }
 
 func (self *SVirtualizedGuestDriver) GetRandomNetworkTypes() []string {
diff --git a/pkg/compute/models/guestnetworks.go b/pkg/compute/models/guestnetworks.go
index 38a9e337a4..6529546e7c 100644
--- a/pkg/compute/models/guestnetworks.go
+++ b/pkg/compute/models/guestnetworks.go
@@ -314,17 +314,24 @@ func (manager *SGuestnetworkManager) newGuestNetwork(
 			// if reuse Ip address, no need to check address availability
 			// assign it anyway
 			gn.IpAddr = address
-		} else if provider == api.CLOUD_PROVIDER_ONECLOUD || options.Options.EnablePreAllocateIpAddr {
-			addrTable := network.GetUsedAddresses()
-			recentAddrTable := manager.getRecentlyReleasedIPAddresses(network.Id, network.getAllocTimoutDuration())
-			ipAddr, err := network.GetFreeIP(ctx, userCred, addrTable, recentAddrTable, address, allocDir, reserved)
-			if err != nil {
-				return nil, err
+		} else {
+			// 如果是不具备IPAM能力的平台（主要是OneCloud和VMware，也就是VPC为ONECLOUD的平台 provider == api.CLOUD_PROVIDER_ONECLOUD ），则需要分配IP地址
+			// 如果是其他云平台（具体IPAM能力的平台），则
+			// * 开启options.Options.EnablePreAllocateIpAddr，也就是把IPAM的任务交给平台的，则需要分配IP地址
+			// * IP地址为空并且 !options.Options.EnablePreAllocateIpAddr 时，不需要分配IP，等创建后自动同步过来
+			// * 否则，还是需要先分配了
+			if provider == api.CLOUD_PROVIDER_ONECLOUD || options.Options.EnablePreAllocateIpAddr || (!options.Options.EnablePreAllocateIpAddr && len(address) > 0) {
+				addrTable := network.GetUsedAddresses()
+				recentAddrTable := manager.getRecentlyReleasedIPAddresses(network.Id, network.getAllocTimoutDuration())
+				ipAddr, err := network.GetFreeIP(ctx, userCred, addrTable, recentAddrTable, address, allocDir, reserved)
+				if err != nil {
+					return nil, err
+				}
+				if len(address) > 0 && ipAddr != address && requiredDesignatedIp {
+					return nil, fmt.Errorf("candidate ip %s is occupied!", address)
+				}
+				gn.IpAddr = ipAddr
 			}
-			if len(address) > 0 && ipAddr != address && requiredDesignatedIp {
-				return nil, fmt.Errorf("candidate ip %s is occupied!", address)
-			}
-			gn.IpAddr = ipAddr
 		}
 
 		if vpc.Id != api.DEFAULT_VPC_ID && provider == api.CLOUD_PROVIDER_ONECLOUD {
diff --git a/pkg/compute/models/guests.go b/pkg/compute/models/guests.go
index a0ca424ec1..245ce8efd4 100644
--- a/pkg/compute/models/guests.go
+++ b/pkg/compute/models/guests.go
@@ -3663,8 +3663,8 @@ func (self *SGuest) SyncVMNics(
 			TryReserved:         true,
 			AllocDir:            api.IPAllocationDefault,
 			RequireDesignatedIP: true,
-			UseDesignatedIP:     false,
-			NicConfs:            []SNicConfig{nicConf},
+			// UseDesignatedIP:     true,
+			NicConfs: []SNicConfig{nicConf},
 		})
 		if err != nil {
 			result.AddError(err)
diff --git a/pkg/compute/options/options.go b/pkg/compute/options/options.go
index cf6610e560..1a86cbcfe1 100644
--- a/pkg/compute/options/options.go
+++ b/pkg/compute/options/options.go
@@ -125,6 +125,7 @@ type ComputeOptions struct {
 	// cloud image sync
 	CloudImagesSyncIntervalHours int `default:"3" help:"Interval to sync public cloud image, defualt is 3 hour"`
 
+	// 由云管(Cloudpods)负责分配IP地址，默认为false。默认是由对应具备IPAM能力的云平台自主分配IP地址
 	EnablePreAllocateIpAddr bool `help:"Enable private and public cloud private ip pre allocate, default false" default:"false"`
 
 	// 创建虚拟机失败后, 自动使用其他相同配置套餐