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FAQ

Is there an upper limit on the routing information that can be set for the subnet on the logical network?

(:Last updated）

There is a limit when setting with the GUI (up to 4 lines).
If you try to set more than 5 lines, the creation/editing of the subnet fails due to an error. (Error message: "Maximum length of static route exceeded")
Reference: Tutorial - Logical Network -  Subnet Details

On the other hand, there is no upper limit when setting with API.

To set routing information of 5 lines or more, please execute it with API.
Reference: API Reference - Subnet

  • ECL2.0
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  • Logical Network
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Related Pages

  • After creating a new tenant, an error occurred when creating a logical network.ECL2.0, Logical Network / Construction, Specification

    In some cases, you may receive an error for certain configuration changes, such as Network creation, directly following the creation of a new Tenant. If this occurs, simply retry the configuration change after 5 minutes.

    Reference：Tutorial - How to Create & Connect Networks

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  • About the issue which subnet becomes error status when subnet of logical network editsECL2.0, Logical Network

    Issue

    If the following conditions are all satisfied on the logical network, the status of the subnet will be an error.
    ① When creating a logical network, disable the subnet address setting function (DHCP function)
    ② Edit the subnet in the state of ① and activate the address setting function (DHCP function)
    ③ Edit the subnet in the state of ② and change options such as DNS server function and NTP server function

    If you edit the resource connected to the subnet with subnet status error, the operation fails.

    Region

    JP1, JP2, JP3, JP4, JP5, DE1, UK1, SG1, US1

    Solution

    · If you want to change the subnet options (DNS server, NTP server, etc.) in the state of ②, please delete and re-create instead of editing the subnet
    · If you change the subnet option in the state of ② and the subnet becomes an error, please inquire with a ticket

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  • When I create a logical network after creating a new tenant, the status becomes an error and creation fails.ECL2.0, Logical Network / Construction, Specification

    In some cases, you may receive an error for certain configuration changes, such as Network creation, directly following the creation of a new Tenant. If this occurs, simply retry the configuration change after 5 minutes.

    Reference: Tutorials - How to Create & Connect Network

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  • About the issue which the DHCP server of the logical network announces an unintended cache (resolver) DNS server addressBaremetal Server, Common Function Gateway, ECL2.0, Logical Network, Virtual Server

    Overview of the Issue

    • The DHCP server of the logical network delivers an IP address (IP address of the DHCP server) that the customer does not intend as the IP address of the cache (resolver) DNS server.
    • If the OS of the virtual server instance or the bare metal server acquires the IP address (DHCP server IP address) that the customer does not intend as the IP address of the cache (resolver) DNS server by DHCP, the global name space name can be resolved.* Enterprise Cloud 2.0 does not offer cache (resolver) DNS server.

    Detail of the issue

    Region

    • JP3, JP4, JP5

    Menu

    • It occurs when both of the logical network and the server (virtual server or bare metal server) satisfy the following conditions.
    • Logical network
      • Case 1. Create from the Logical Network menu and enter the following items in the subnet
        • DHCP enabled: Checking
        • DNS server: You have not entered an IP address in the text box
      • Case 2. Common Functions Common Functions Created from Gateway Menu All logical networks for gateway
    • Server
      • Case 1. Create with virtual server menu, with the following settings
        • Interface: Connected to a logical network that meets the above conditions
        • OS: Obtained the IP address of the cache (resolver) DNS server by DHCP
      • Case 2. Bare metal server
        • Interface: Connected to a logical network that meets the above conditions
        • OS: Obtained the IP address of the cache (resolver) DNS server by DHCP

    Confirmation method

    • The method of checking whether the condition that this event meets is as follows.
    • Logical network
      • Subnet
        • Cloud Computing Control Panel> Network> Logical Network> Please press subnet name from subnet.
          • DHCP Enabled: Please confirm whether it is valid on "Subnet Details" screen
          • DNS Server: It may be applicable when DNS server is "None" on "Subnet Details" screen. In case of "None", it indicates whether the DNS server address has been delivered without entering the IP address in the DNS server, or 0.0.0.0 is entered to stop distributing the DNS server address.
    • Virtual Server
      • Interface
        • Please press the instance name from the cloud computing control panel> server> virtual server> instance and check on the "instance details" screen
      • OS
        • Windows Server 2012 R2 / Windows Server 2016: Network and Sharing Center> Changing adapter settings> "Interface name connected to logical network"> Properties> Internet Protocol Version 4 (TCP / IPv4) Please check on Internet Protocol Version 4 (TCP / IPv4) Properties screen
        • Execute the following command at Red Hat Enterprise Linux / CentOS: Shell and check the output.
          • nmcli connection show <interface name connected to the logical network>
    • Bare metal server
      • Interface
        • Cloud Computing Control Panel> Server> Please press the bare metal server name from the bare metal server and check on the "Bare Metal Server Details" screen.
      • OS
        • Windows Server 2012 R2: Network and Sharing Center> Changing Adapter Settings> "Logical (VLAN) Interface Connected to Logical Network"> Properties> Internet Protocol Version 4 (TCP / IPv4) Please check on the Properties of protocol version 4 (TCP / IPv4) screen
        • Execute the following command at Red Hat Enterprse Linux / CentOS: Shell and check the output
          • nmcli connection show <interface name connected to the logical network>

    Solution

    The solution is as follows.

    1. When it is necessary to acquire the IP address of the cache (resolver) DNS server by DHCP
      • Please perform the following setting in "Edit Subnet".
        • DNS Server: Enter the IP address of the cache (resolver) DNS server in the text box (* 1)
    2. When it is not necessary to acquire the IP address of the cache (resolver) DNS server by DHCP
      • Please perform the following setting in "Edit Subnet".
        • DNS Server: Check the "Disable DNS Server" check box. (* 2)

    * 1 We do not offer cache (resolver) DNS server in Enterprise Cloud 2.0. Therefore, please specify the IP address of your internal DNS server and the IP address of the cache DNS server provided by the customer's selected public DNS service.

    * 2 In the case of API, enter 0.0.0.0 in the DNS server section.

    Schedule

    We plan to change the setting of the logical network of existing customers and stop delivery of an unintended cache (resolver) DNS server address.

    If you need to take action before then, please take measures to deal with delivery / distribution of DNS server addresses referring to the above mentioned actions.

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  • Can I edit the IP Address Pool of the subnet?ECL2.0, Logical Network / Operation, Specification

    No. In order to change the IP Address Pool, it is necessary to delete/re-create the subnet.

    Service Descriptions - Logical Network - Address Management function (Subnet)

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