5.1.1. Logical Network¶

Creation of each resource in Enterprise Cloud 2.0 requires creation of a Logical Network beforehand for relevant resources."

Note

Since a Logical Network is already automatically and systematically configured and connected with the Common Function Gateways (CFGW), there is no need to change the CFGW.

5.1.1.1. Creation procedure¶

Log in to the Control Panel, then select **Network**", then select "Logical Network"."
After the screen of the logical network is displayed, click "Create Logical Network " to move to the screen for entering items needed for network creation.
The following three items, such as Network", "Subnet", and "Subnet Details", need to be input when your creating a Logical Network as below:"

Create Logical Network¶

Following are the items necessary to set up the Network as below:

Name of the Logical Network	The Name of Network can be set by you.
Plane	For the Logical Network type to be newly created, choose from the following Network types : ‘Data’ or ‘Storage'. NOTE: You should select 'Data' as logical network type except when connecting a Baremetal Server to a Storage Server.
Descriptions on the Logical Network	Describe the details about the purpose of the Logical Network usage for your understanding and management.
Tags of the Logical Network	This tag is utilizing in order for you to search for the specific Logical Network as well as to specify the conditional Logical Network from among the list of your created Logical Networks.
Admin State	Choose either 'UP' or 'Down' for the initial Logical Network condition. NOTE: Down logical Network can not communicate with any Networks.

After your inputting the settings of a Logical Network, you are required to fill in the IP Address information to assign in the Logical Network.

Subnet creation¶

Input the IP Address information to be assigned to your created Logical Network in the above.

Name of the Subnet	The Name of a Subnet is set by Customers.
Network Address	Configure a Network Address to assign to a Logical Network. You can specify it in a CIDR format, also.
Gateway IP Address	Specify any IP Address from the Network Addresses above you have set, if you would like to set another Default Gateway of another NW connect point within the Subnet. If you would like to set as No Gateway", mark to the "Disable Gateway" box."

Detail subnet settings¶

For the subnet on a logical network, make settings including DHCP function (address setting function) on/off and routing information.

With the DHCP function enabled, information is automatically sent to interfaces (NIC) just added to resources, for example when a virtual server is created or when a connection interface is added.

Note

With the DHCP function (address setting function) disabled, an IP address is not automatically set to the OS on the instance. Make OS settings discretely.
When using VRRP, enable DHCP. With DHCP disabled, an ARP request is sent from the network of Service Provider, with source IP address 0.0.0.0. It has been confirmed that in this case, an ARP reply is not made in terms of some appliances.
For details about the DHCP function, refer to '4.1 Logical Network <https://ecl.ntt.com/documents/service-descriptions/logicalnw/logicalnw.html>'_.

Enable DHCP	Checking the checkbox enables the DHCP function (server address setting function).
Allocation Pools	Specify an IP address range issuable to each interface.
DNS Name Servers	Specify a DNS server to be used by the customer. Checking on "Disable DNS server" checkbox --- DNS server address is not advertised. Checking off "Disable DNS server" checkbox --- Designated DNS server address is advertised.
NTP Server	Specify an NTP server to be used by the customer.
Creating an additional Host Route.	If you need the Common Routing settings for the Resource connected to the relevant Logical Network, fill in the Routing information in this section.

Once you have input the required items, click “Create Logical Network”. The created Logical Network will be added to the list of Logical Networks.

Execute the same tasks repeatedly for additional Logical Network numbers as needed.

5.1.1.2. Change procedure¶

Port addition procedure¶

Use the procedure below to add a port to a logical network.

For example, manually registering the IP address in use prevents the IP address from being automatically output.

On the list of logical networks, click one logical network to move to the page shown below.
Click "Create Port " regarding the port item.

Enter information such as a port name on the "Basic Information " tab on the port creation screen.

On the port creation screen, click the "Fixed IP address " tab, and then enter information on the fixed IP address.
If intending not to subject any IP address to auto output, make an entry here.

On the port creation screen, click the "Allowed Address Pair " tab, and then enter information on the allowed address pair.
Last, click "Create Port " to complete the addition of the port.

Procedure for setting an allowed address pair¶

To use a redundancy protocol such as VRRP with a virtual server for example, a virtual IP address and virtual MAC address need to be registered on ports.
Please note that if this setting is not implemented, communication to virtual IP address which is used in redundancy protocol is not possible.
Regarding all ports to be connected with a virtual server on which a redundancy protocol is to be functional, register an identical virtual IP address and virtual MAC address.
For a virtual MAC address, specify an address which conforms to the specifications of the redundancy protocol.
Redundancy scheme to use the same IP address by different MAC addresses will not work.

Once you click one Logical Network at the Logical Network Overview below, you will be able to move to the following page as shown below.

On the port list, click "Edit Port " tab, and then enter information on the virtual IP address and virtual MAC address to be assigned to the port.

Procedure for enabling DHCP (address setting function)¶

Use the procedure below to change DHCP (address setting function) of a logical network from disabled status to enabled status.

Note

With the DHCP function (address setting function) disabled, an IP address is not automatically set to the OS on the instance. Make OS settings discretely.
When using VRRP, enable DHCP. With DHCP disabled, an ARP request is sent from the network of Service Provider, with source IP address 0.0.0.0. It has been confirmed that in this case, an ARP reply is not made in terms of some appliances.
For details about the DHCP function, refer to '4.1 Logical Network <https://ecl.ntt.com/documents/service-descriptions/logicalnw/logicalnw.html>'_.

Log in to the Control Panel, then select **Network**", then select "Logical Network"."
On the list of logical networks, click a logical network whose DHCP is to be enabled. With the page below shown, click "Edit Subnet " regarding action.

On the subnet edit screen, click "Subnet Details ".

Check the checkbox for enabling DHCP, and then click "Edit Subnet " (blue button shown at the bottom).

Now, enabling DHCP is completed.

Note

With this function enabled, one IP address for the address setting logic port (DHCP server port) is used by the service-side. The smallest number among the addresses not used for the "resource address management function (port)", in the IP address assignment pool is assigned automatically.
Even with this function enabled, an arbitrary IP address can be assigned as a fixed one. When connecting with a resource, specify an arbitrary address using the address assignment function of the port.

5.1.1.3. Deletion procedure¶

Log in to the Control Panel, then select **Network**", then select "Logical Network"."
If you would like to delete any Logical Network, you also need to completely remove all of the Subnets, which belong in the Logical Network being deleted.
To delete subnet, all ports connected with the subnet need to be deleted beforehand. For virtual network appliances (Managed Firewall, Managed UTM, load balancer (NetScaler VPX), firewall (Brocade 5600 vRouter), etc.), the ports are managed by Service Provider and thus cannot be checked with the screen of the logical network. Execute disconnection from a logical network, through the respective menu screens of virtual network appliances.

Subnet deletion¶

Once you click one Logical Network at the Logical Network Overview below, you will be able to move to the following page as shown below.

Select a Subnet which you would like to delete, then execute Delete Subnet"."

Delete a Logical Network¶

After completed to **Delete Subnets**", return to the list screen of Logical Networks then click on "Delete Logical Network"."

5.1. How to use Network / SD-Exchange menu

5.1.2. Internet Connectivity