ZStack Cloud 4.8.0>Tutorials>Private Cloud>VM Multi-Gateway Configuration Tutorial>Enable Multi-Gateway

Enable Multi-Gateway

You can enable multi-gateway for a VM instance in the following scenarios:

Create a VM instance with multi-gateway enabled: When creating a new VM instance, you can enable multi-gateway for it. For more information, see Create a VM Instance with Multi-Gateway Enabled.
Enable multi-gateway for an existing VM instance: For an existing VM instance, you can configure it to support multi-gateway. For more information, see Enable Multi-Gateway for an Existing VM Instance.

Create a VM Instance with Multi-Gateway Enabled

To create a VM instance with multi-gateway enabled, follow these steps:

Log in to the Cloud using zstack-cli.
Suppose that the account name is admin, run the following zstack-cli commands to log in to the Cloud:
```
[root@10-0-5-87 ~]# zstack-cli admin >>>LogInByAccount accountName=admin password=password
```
- accountName: The account name.
- password: The account password.
Create a VM instance with multi-gateway enabled.
Run the following command to create a VM instance with muti-gateway enabled:
```
admin >>>CreateVmInstance name=VM instanceOfferingUuid=212a84a3c5324d8b880def26bbbcf31f imageUuid=43865d648c8155538f5d76292634da05 l3NetworkUuids='fd4eca3d6d5d4d30afea94a1be6d48da,3b60d16ead2f4a07a7869258315a3511' defaultL3NetworkUuid='fd4eca3d6d5d4d30afea94a1be6d48da' systemTags='vmMultipleGateway::true'
```
- name: The VM instance name.
- instanceOfferingUuid: The instance offering UUID for the new VM instance.
- imageUuid: The image UUID for the new VM instance.
- l3NetworkUuids: The L3 network UUID list for the new VM instance.
- defaultL3NetworkUuid: The L3 network UUID for the default VM NIC.
- systemTags: The SystemTag that configures the multi-gateway status. Use systemTags='vmMultipleGateway::true'.
The above example only lists the required parameters for creating a VM instance. For more information, refer to CreateVmInstance in API Reference.
Verify the multi-gateway status.

Launch the console of the VM instance and log in. Run the route -n command to check the gateway configuration.

Figure 1. Check the Gateway Configuration

Enable Multi-Gateway for an Existing VM Instance

To enable multi-gateway for an existing VM instance, follow these steps:

Check the multi-gateway configuration of a VM instance.

Enter the details page of a VM instance, and then choose Configuration Info > NIC. On the NIC page, check and ensure that the VM instance has more than one NIC and is disabled with multi-gateway.
Log in to the Cloud using zstack-cli.
Suppose that the account name is admin, run the following zstack-cli commands to log in to the Cloud:
```
[root@10-0-5-87 ~]# zstack-cli admin >>>LogInByAccount accountName=admin password=password
```
- accountName: The account name.
- password: The account password.
Enable multi-gateway.
Run the following command to enable multi-gateway for the VM instance:
```
admin >>>CreateSystemTag resourceType=VmInstanceVO tag='vmMultipleGateway::true' resourceUuid=32127778d053473f97498dbef8189fb2
```
- resourceType: The resource type of the VM instance. Use resourceType=VmInstanceVO.
- tag: The system tag. Use tag='vmMultipleGateway::true'.
- resourceUuid: The VM instance UUID.
Note: The above configuration only takes effect after you restart the VM instance.
Verify the multi-gateway status.

After the VM instance restarts, launch the console of the VM instance and log in. Run the route -n command to check the gateway configuration.

Figure 1. Check the Gateway Configuration

Next Chapter:Disable Multi-Gateway

Enable Multi-Gateway

Create a VM Instance with Multi-Gateway Enabled

Enable Multi-Gateway for an Existing VM Instance

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