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External Networks are assigned to a single enterprise and they may have public or private IP addresses. IP addresses on these networks can be used in more than one virtual datacenter. External networks can be assigned to an enterprise's datacenters or virtual datacenters as a default network, thus streamlining the configuration of access to networks outside the virtual datacenter.

Create VLANs for External Networks

External networks can use public or private IP addresses and they can be shared across one or more virtual datacenters. External networks are created from the External networks tab.

To create external networks, you must enter the network details and a VLAN tag.

Click the add button  at the top of the NETWORKS list and complete the form. 

Tag Availability Info

The Check button will check if the VLAN tag is available for all the racks of the datacenter. An external VLAN can be used on any rack and should be tagged in the same way on all racks. Tags in use by other VLANs will display a yellow warning signal but they may be used; only invalid tags will be rejected, with a red signal.

External IPv4 Networks

Abiquo does not pre-create IP addressses for IPv4 networks.

Configure Static Routes Using DHCP for External Networks

Abiquo allows you to configure Static Routes in the Abiquo DHCP Server when you create or edit a VLAN. Static Routes allow you to configure a path to a second network apart from the default route. For example, you can use them to allow access to both the corporate network and the Internet. Virtual machines will obtain their static routes from the DHCP server when they are deployed and started up. Changes to static routes will be received by the virtual machines when they reconnect to the DCHP server; for example, after they are restarted.

To add a Static Route, click the Manage button. The Static Routes dialog box will open. For each static route, enter its details. For example, to add a static route to the network/netmask via the gateway/next hop, you would enter the details in the table below.

Abiquo will add the static routes to the DHCP server leases as option 249 for the Microsoft Classless Static Route Option and option 121 for the Classless Static Route Option in RFC3442.

For information on how to set up the DHCP server and clients (CentOS or Windows), see DHCP RFC3442 Classless Static Route Configuration.

To delete a static route, click the delete button ("X") beside the static route details.

External IPv6 Networks

Abiquo does not pre-create IP addressses for IPv6 networks.

Add IP Addresses

To add IPv6 addresses to your network, click the Add an IPv6 address link in the top right-hand corner of the Networks page.

The IP addresses you create will be automatically made available to users of the enterprise that owns the network. If you do not wish to make all the IP addresses available, click the Available IPs link.


Make IP Addresses Available

The Available IP addresses popup enables you to select the IP addresses that will be available for users to assign in their virtual datacenters. Abiquo recommends that after creating a network, you should make unavailable IP addresses such as the IPv4 gateway network address.

To edit the available IP addresses, select the network, then click the Available IPs link in the top right-hand corner of the Public IPs page. The Edit network popup will open at the Available IPs page.

The Edit network popup has two columns for Not Available and Available IP addresses.

By default, all IPs will be available for users to add to their virtual datacenters. Leave the IPs you wish to offer to users in the right column. 

To move an IP, drag and drop it or select it and click a single arrow button. To move all IPs to the other column, use the double arrow buttons to move IPs in the direction indicated by the arrows.

External IPs in use will not be shown

You cannot change an external IP address that is in use on a virtual machine to make it Not Available

Make an External VLAN the Default

To make the external VLAN the default for an enterprise's datacenter, go to Users view and edit the enterprise. Select the Datacenters tab and edit an allowed datacenter. You can also assign an external network as the default for a virtual datacenter. Open the virtual datacenter at the network tab. Select the virtual datacenter's external network and click the edit button. On this edit screen, you can only make the network the default.

Edit Network Information

To edit the Network Information for an external VLAN, select it in the VLAN list on the external page. Then click the edit button  above NETWORKS list and select 'Edit' from the menu. 

Delete External VLANs

To delete an external VLAN, select it in the VLAN list on the External tab. Check that there are no virtual machines using IP addresses from this network, then click the delete button .

Restrictions on deleting VLANs

You cannot delete an external VLAN if any of its IP addresses are in use on virtual machines.

View the IP List

On the right side of the screen, in the EXTERNAL IPs pane, you will see details of the IPs of the selected VLAN. Click in the header of a column to sort by that column, use the Search button to filter the results by any field and navigate through the pages with the page scroll. The VLAN type is shown in the bottom right section of the VLAN details when you click on the VLAN name.

How to put an IP on a denylist

Occasionally a user may misuse a Public IP. If this happens, the DNS providers can block this IP. Abiquo also allows you to mark an IP to quarantine it. This prevents another enterprise from reserving this IP and attaching it to another VM. Just select the problem IP and mark the quarantine checkbox. Then click Yes to confirm. The following screenshot shows all external networks with the IP addresses sorted by the Quarantine column.