3.1. Logical Network

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


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.

3.1.1. Configuring a Logical Network: A Procedure

Log in to the Control Panel, then select “Network”, then select “Logical Network”.
Once the “Logical Network” GUI appears, select “Create Logical Network”. Complete as shown below:
The following three items, such as “Network”, “Subnet”, and “Subnet Details”, need to be input when your creating a Logical Network as below: 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.


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 (“Subnet”) to assign in the Logical Network. Subnet

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. Subnet Details

Configure the routing information settings and depending if a DHCP server exists, to the Subnet upon the Logical Network, depending on those already set in above procedure of “Subnet”.
The information you have configured in this part will be automatically delivered to the Interface (i.e. “NIC”) adding a new connected Interface and / or configuring an Interface in the appropriate resource.


  • If you set the DHCP Function(Address setting function) “inactivated”, OS’s connecting to the Instance can’t recognize the IP Address which you have configured when you created it. In such case, you need to set IP address on OS by yourself.

  • When using VRRP, please make DHCP function of the Logical Network to be connected “valid”. When the DHCP function is “invalid” , the ARP request is executed at the source address of on ECL2.0 Network. In this case, it is confirmed that Load Balancer, Managed Firewall/UTM, etc. provided by NTTCom do not reply ARP and interruption of transmission may occur at the time of VRRP switching.

  • Please refer to Service Description: Logical Network for the detail of DHCP function.


Allocation Pools

You need to specify a range of the specific IP Address, which each IP Address is assignable to a relevant Interface.

DNS Name Servers

If you have already prepared a DNS Server then you need to specify an IP Address of the DNS Server.

NTP Server IP Addresses

If you have already prepared a NTP Server, you are required to specify its IP Address.

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. Delete a 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.

Delete Subnet

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 Logical Network

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