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Configuring a network

Creating a network


You use the Create Network wizard on the Networks Network View page to create a new network on the HCP system. In order to use the wizard, a system administrator needs to have enabled Virtual network management. For more information on Virtual network management, see About the Advanced Setting panel

When you create a new network with the wizard:

The network is enabled by default, but it is initially empty. To make the new network usable, you need to modify the initial network configuration to assign IP addresses to one or more nodes.

For instructions on configuring node IP addresses for a new network, see Assigning IP addresses to nodes for a network.

The network is configured to use the default downstream DNS configuration settings: hidden master is disabled, notify is disabled, and the refresh rate is set to three hours.

For more information about the effects of each setting and for a list of considerations for modifying each setting, see Downstream DNS configuration settings for networks.

For instructions on modifying the default downstream DNS configuration settings after creating a new network, see Changing the default downstream DNS configuration settings for a network.

To create a new network, on the Networks Network View page:

1.Click on Create Network above the network list to open the Create Network wizard.

2.On the Settings page in the wizard:

oIn the Network Name field, type a unique name for the network. User-defined network names:

Must be from one through 63 characters long.

Can contain only characters that are valid in DNS hostnames. In English, valid hostnames can contain only alphanumeric characters and hyphens (-).

Cannot start or end with a hyphen.

Cannot contain white space.

Are not case sensitive.

Additionally, the following words are reserved and cannot be used as network names: none, [hcp_system], and [hcp_backend].

oOptionally, in the Description field, type a description of the network. This text can be up to 1,024 characters long and can contain any valid UTF-8 characters, including white space.

oTake one of these actions:

To create an untagged network, select Make untagged network. This option is hidden if an untagged network already exists.

To create a tagged network, in the VLAN ID field, type a VLAN ID for the network. Valid values are integers in the range one through 4,094.

The VLAN ID field is grayed while Make untagged network is selected.

oIn the MTU field, select 1500 or 9000.

If an untagged network exists, the MTU that you select cannot be larger than the MTU for the untagged network. If you’re creating an untagged network and an existing network has an MTU of 9,000, the network you’re creating must have an MTU of 9,000. For information on untagged networks, see Tagged and untagged networks.

oIn the Domain field, select a domain for the network. The dropdown list does not include domains that have only a CSR and no SSL server certificates.

3.Click on Next.

4.On the IP Configuration page in the Create Network wizard, take one of these actions:

oIf HCP is configured to support only one type of IP address, the wizard automatically selects the supported IP mode for the new network and displays the fields that you need to use to specify IPv4 or IPv6 configuration settings for the network.

If the wizard displays the IPv4 Configuration section or the IPv6 Configuration section, go to step 5.

oIf HCP is configured to support both IPv4 and IPv6 addresses, and the [hcp_system] network is configured to use both IPv4 and IPv6 addresses, you can configure the network to use either or both types of IP addresses.

If the wizard displays the IP Mode section, and does not display any warning messages, select one or both options to set the IP mode for the network:

To configure the network to use only IPv4 addresses, select only IPv4. When you select this option, the wizard displays the IPv4 Configuration section.

To configure the network to use only IPv6 addresses, select only IPv6. When you select this option, the wizard displays the IPv6 Configuration section.

To configure the network to use both IPv4 and IPv6 addresses, select both options.

oIf HCP is configured to support both IPv4 and IPv6 addresses, but the [hcp_system] network is configured to use only one type of IP address, you need to configure the new network to use only the type of IP address that the [hcp_system] network uses.

If the wizard displays the IP Mode section, but it also displays a warning message to inform you that the [hcp_system] network is configured to use only one type of IP address, select only the option that corresponds to that type of IP address.

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Note: If the wizard displays this warning message, only the supported IP Mode option is selectable. However, you still need to select this option before you can continue specifying configuration settings for the new network.

5.Take either or both of these actions:

oIf the HCP system supports only IPv4 addresses or if you selected IPv4 in step 4 above, in the IPv4 Configuration section:

In the Gateway field, type the IP address of the gateway that you want to use for the IPv4 subnet.

In the Subnet Mask field, type the subnet mask that you want to use for the IPv4 subnet.

oIf the HCP system supports only IPv6 addresses or if you selected IPv6 in step 4 above, in the IPv6 Configuration section:

Under IPv6 Address Settings:

In the Gateway field, type the IP address of the gateway that you want to use for the primary IPv6 subnet.

In the Prefix Length field, type the IPv6 address prefix length that you want to use for the primary IPv6 subnet.

Optionally, to configure a secondary IPv6 subnet for the network, under Secondary IPv6 Address Settings:

In the Gateway field, type the IP address of the gateway that you want to use for the secondary IPv6 subnet.

In the Prefix Length field, type the IPv6 address prefix length that you want to use for the secondary IPv6 subnet.

6.Click on Next.

7.On the Review page in the Create Network wizard, review the network configuration settings that you entered.

8.Take one of these actions:

oIf the configuration settings that you entered are incorrect:

a.Use the Previous and Next buttons to navigate through the wizard and modify your entries on each page, as necessary.

b.When you have corrected all the configuration errors, use the Next button to navigate to the Review page.

c.Click on Finish to exit the wizard and create an empty network with the specified configuration.

oIf the configuration settings that you entered are correct, click on Finish to exit the wizard and create an empty network with the specified configuration settings.

When you exit the wizard, the Network View panel displays the IP Configuration panel for the new network, showing the IPv4 and IPv6 subnet configuration information that you entered in the Create Network wizard.

You can use the IP Configuration panel to assign IP addresses to one or more nodes for the new network.

For instructions on using the IP Configuration panel to configure node IP addresses for a new network, see Using the Network View page to configure node IP addresses for a network.

Optionally, from the IP Configuration panel, you can click on the applicable tab to display the Settings panel, and then use the Settings panel to change the default downstream DNS settings for the network.

For instructions on using the Settings panel to view and change the downstream DNS settings for a network, see Changing the default downstream DNS configuration settings for a network.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Assigning IP addresses to nodes for a network


You can use either the Networks Network View page or the Networks Node View page to assign IP addresses to one or more nodes for each network defined on the HCP system:

Use the Networks Network View page to configure node IP addresses for a specific network.

Use the Networks Node View page to assign IP addresses to each node for one or more networks.

The next two sections provide instructions for assigning IP addresses to nodes for a network using the Networks Network View page and using the Networks Node View page, respectively.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Using the Network View page to configure node IP addresses for a network


To use the Networks Network View page to configure node IP addresses for a network:

1.On the Networks Network View page, in the network list, click on the name of the network that you want to configure.

2.In the panel that opens, click on the IP Configuration tab.

3.On the IP Configuration panel, in the node IP addresses table at the bottom of the page, specify the IPv4 and IPv6 addresses that you want to assign to each node included in the network:

oTo assign an IPv4 address to a node, in the row for that node, in the text field in the IPv4 Address column, type the IP address that you want to assign to the node on the IPv4 subnet.

oTo assign a primary IPv6 address to a node, in the row for that node, in the text field in the IPv6 Address column, type the IP address that you want to assign to the node on the primary IPv6 subnet.

oTo automatically generate a primary IPv6 address for each node in the HCP system, click on Calculate Primary.

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Notes: 

If any node already has a primary IPv6 address for the network, the generated primary IPv6 address overwrites the existing address.

You can use the Calculate Primary button to generate primary IPv6 addresses only if the primary IPv6 address prefix length is 64 or greater.

oTo assign a secondary IPv6 address to a node, in the row for that node, in the text field in the IPv6 Address column, type the IP address that you want to assign to the node on the secondary IPv6 subnet.

oTo automatically generate a secondary IPv6 address for each node in the HCP system, click on Calculate Secondary.

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Notes: 

If any node already has a secondary IPv6 address for the network, the generated secondary IPv6 address overwrites the existing address.

You can use the Calculate Secondary button to generate secondary IPv6 addresses only if the secondary IPv6 address prefix length is 64 or greater.

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Note: Fields and buttons used to assign IPv4 and IPv6 addresses to nodes appear only when the applicable IP Mode options are selected on the IP Configuration panel. The IPv4 Address column in the node list table appears only when IPv4 is selected. The IPv6 Address and Secondary IP Address columns in the node list table and the Calculate Primary and Calculate Secondary buttons under the node list table appear only when IPv6 is selected.

4.Click on Update Settings.

A warning message appears asking you to confirm the changes you’ve made to the IP configuration settings for the network.

5.In the field in the message window, type YES. This is case sensitive.

6.Click on Update Settings.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Using the Node View page to assign network IP addresses to a node


To use the Networks Node View page to assign IP addresses to a node for one or more networks:

1.On the Networks Node View page, in the node list, click on the number of the node to which you want to assign network IP addresses.

2.On the panel that opens, in the Network Settings table, specify the IP addresses that you want to assign to the node for each network in which you want to include that node:

oTo assign an IPv4 address to a node for a network, in the row for that network, in the IP field, type the IP address that you want to assign to the node on the IPv4 subnet defined for the network.

oTo assign a primary IPv6 address to a node for a network, in the row for that network, in the Primary IP field, type the IP address that you want to assign to the node on the primary IPv6 subnet defined for the network.

oTo automatically generate a primary IPv6 address for the node for each network that is configured to use a primary IPv6 subnet:

a.At the top of the panel, click on Calculate IPv6 Addresses.

b.In the Calculate IPv6 Addresses section, click on Calculate Primary.

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Notes: 

If any node already has a primary IPv6 address for the network, the generated primary IPv6 address overwrites the existing address.

You can use the Calculate Primary button to generate primary IPv6 addresses only if the primary IPv6 address prefix length is 64 or greater.

oTo assign a secondary IPv6 address to a node for a network, in the row for that network, in the Secondary IP field, type the IP address that you want to assign to the node on the secondary IPv6 subnet defined for the network.

oTo automatically generate a secondary IPv6 address for the node for each network that is configured to use a secondary IPv6 subnet:

a.At the top of the panel, click on Calculate IPv6 Addresses.

b.In the Calculate IPv6 Addresses section, click on Calculate Secondary.

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Notes: 

If any node already has a secondary IPv6 address for the network, the generated secondary IPv6 address overwrites the existing address.

You can use the Calculate Secondary button to generate secondary IPv6 addresses only if the secondary IPv6 address prefix length is 64 or greater.

3.At the bottom of the page, click on Update Settings.

A warning message appears asking you to confirm the changes you’ve made to the networks for which you’ve assigned IP addresses to the node.

4.In the field in the message window, type YES. This is case sensitive.

5.Click on Update Settings.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Changing the default downstream DNS configuration settings for a network


When you create a new network with the Create Network wizard, the network is configured to use these default downstream DNS configuration options:

Hidden master is disabled

Notify is disabled

The refresh rate is three hours

Once you have created a new network, at any time, you can use the Networks Network View page to change these default settings.

For more information about the effects of each setting and for a list of considerations for modifying each setting, see Downstream DNS configuration settings for networks.

To change the default downstream DNS configuration settings for a network:

1.On the Networks Network View page, click on the name of the network for which you want to change the default downstream DNS configuration settings.

2.Take one of these actions:

oIf the Settings panel opens, go to step 4.

oIf the IP Configuration panel opens, click on the Settings tab at the top of the panel to display the Settings panel.

3.On the Settings panel, click on Downstream DNS Configuration to view the downstream DNS configuration settings.

4.In the Downstream DNS Configuration section:

oTo enable hidden master, select Enable hidden master.

oTo enable notify, select Enable notify.

oIf you are enabling hidden master or notify, in the Downstream DNS Servers field, type a comma-separated list of between one and ten downstream DNS server IP addresses. Spaces are not allowed.

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Note: If a secondary IPv6 subnet is defined for the network, then each IPv6 address that you specify in the downstream DNS server list must either be on the secondary IPv6 subnet or be routable from the primary IPv6 gateway that’s defined for the network.

oTo change the refresh rate, in the Refresh Rate field, type the new refresh rate. For valid values for the refresh rate, see Downstream DNS configuration settings for networks.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Changing the advanced downstream DNS configuration settings for a network


If advanced downstream DNS configuration mode is enabled and you have the service role, you can use the Networks Network View page to directly access the UNIX IP address management for any forward facing network you created, including [hcp_system].

Changes made in advanced downstream DNS configuration mode need to be manually applied to all nodes added to the system. HCP generates a system log message that alerts you if you need to add new nodes to the zone file. If your changes are compatible with new system versions, all modifications carry over through future system upgrades.

To change the advanced downstream DNS configuration settings for a network:

1.On the Networks Network View page, click on the network for which you want to change the advanced downstream DNS configuration settings.

2.In the Zone Entry field make all of your necessary changes. For more information on the Zone Entry field see, Configuring DNS for HCP.

3.In the Forward Zone field, make all of the your necessary changes. For more information on the Forward Zone field, see Configuring DNS for HCP.

4.Perform one of the following actions:

oIf you want to discard your changes, click on Reset Zone Entry and File. This resets the network to its default downstream DNS configuration settings. For more information on the downstream DNS configuration default settings, see Changing the default downstream DNS configuration settings for a network.

oIf you want to keep your changes, click on Update Settings.

Once you click on Update, HCP performs a syntax validation check and administers your changes to the HCP system. Before they can take effect however, a system reboot is required.

During the reboot, if the HCP system finds any issues with your DNS configuration, it reverts all forward facing networks to their default downstream DNS configuration value. If this occurs, advanced downstream DNS configuration mode remains enabled but your changes are not saved.

Once your HCP system reboots, it’s recommended that you test your DNS access to HCP. If you do not want to keep your changes, click on Reset Zone Entry and File in the Advanced DNS Downstream Configuration panel.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Creating a network alias


To create a network alias, on the Networks Network View page:

1.Click on Create Network Alias above the network list to open the Create Network Alias wizard.

2.On the Settings page in the wizard:

oIn the Network Name field, type a unique name for the network alias. Alias names follow the same rules as network names. For these rules, see Creating a network.

oIn the Aliased Network field, select the network for which you’re creating the alias.

3.Click on Next.

4.On the Review page in the Create Network Alias wizard, review the network alias configuration settings that you entered.

5.Take one of these actions:

oIf the configuration settings that you entered are incorrect:

a.Click on Previous to return to the Settings page of the wizard and modify your entries as necessary.

b.When you have corrected all the configuration errors, click on Next to return to the Review page.

c.Click on Finish to exit the wizard and create the specified alias for the specified network.

oIf the configuration settings that you entered are correct, click on Finish to exit the wizard and create the specified alias for the specified network.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Restarting a network


If a tagged network is enabled but traffic on it is not reaching the HCP system, the cause may be that the network interface cannot be found. In this case, both the Overview and Networks pages in the HCP System Management Console display an alert about the condition.

To resolve this issue, you can restart the network. Restarting a network causes HCP to recreate the network interface that corresponds to the network VLAN ID.

You should not restart a network for which the network interface is functioning properly. Restarting a working network temporarily stops communications on that network from reaching HCP.

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Note: Before restarting a network, ensure that the physical network is functioning properly.

To restart a network:

1.On the Networks Network View page, in the network list, click on the name of the network that you want to restart.

2.At the bottom of the panel that opens, click on Restart Network.

A warning message appears asking you to confirm the action.

3.In the field in the message window, type YES. This is case sensitive.

4.Click on Update Settings.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.

Deleting a network or network alias


You can delete a user-defined network or network alias only if it’s not currently selected for use for any purpose. Additionally, you cannot delete a network that is currently the target of a network alias.

You cannot delete the [hcp_system] or [hcp_backend] network.

To delete a network or network alias:

1.On the Networks Network View page, in the network list, click on the delete control ( DeleteControlOrangeWhiteBG.png ) for the network or network alias that you want to delete.

2.In response to the confirming message, take one of these actions:

oIf you’re sure you want to delete the network or network alias, click on Delete.

oIf you decide not to delete the network or network alias, click on Cancel.

© 2015, 2019 Hitachi Vantara Corporation. All rights reserved.